(19)
(11)EP 2 777 600 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
13.04.2016 Bulletin 2016/15

(21)Application number: 13003176.8

(22)Date of filing:  21.06.2013
(51)International Patent Classification (IPC): 
A61C 7/36(2006.01)

(54)

Telescopic orthodontic appliance

Teleskopische orthodontische Einrichtung

Appareil orthodontique télescopique


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 11.03.2013 US 201361776301 P
11.03.2013 US 201361776309 P
11.03.2013 US 201361776322 P
20.06.2013 US 201313923036

(43)Date of publication of application:
17.09.2014 Bulletin 2014/38

(60)Divisional application:
16000220.0

(73)Proprietor: American Orthodontics Corporation
Sheboygan, WI 53081-1048 (US)

(72)Inventors:
  • Faust, Scott E.
    Kiel, WI 53042 (US)
  • Nimmer, Eric W.
    Plymouth, WI 53073 (US)
  • Vogel, Lee J.
    Kiel, WI 53042 (US)
  • Hayes, Andrew M.
    Chesterfield, MO 53081 (US)

(74)Representative: Von Rohr Patentanwälte Partnerschaft mbB 
Rüttenscheider Straße 62
45130 Essen
45130 Essen (DE)


(56)References cited: : 
WO-A1-2013/096090
US-A- 5 829 975
DE-U1- 29 818 960
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present disclosure relates to the field of orthodontics. More specifically, the present disclosed relates to a telescoping orthodontic appliance employable for maxillary/mandibular bite correction.

    [0002] The present invention specifically relates to an orthodontic appliance according to claim 1.

    [0003] Orthodontic treatment involves the movement of malpositioned teeth to desired positions. During typical treatment, orthodontic brackets are connected to anterior, cuspid, molar, and bicuspid teeth, and an archwire is placed in a slot of each bracket. The archwire guides movement of the brackets and the corresponding teeth to desired positions to correct occlusion. Traditionally, the ends of an archwire have been anchored by appliances known as buccal tubes that are secured to molar teeth (e.g., utilizing bands). More recently, archwire ends are increasingly being secured utilizing buccal tubes bonded directly to molar teeth (e.g., free from use of buccal tubes welded to bands).

    [0004] Various types of spring devices and elastomeric devices may also be used in orthodontic treatment. The resilient forces of such devices in tension or compression may be used to secure an orthodontic appliance and an interconnected tooth or teeth and correspondingly facilitate movement relative to other orthodontic appliances and an interconnected tooth or teeth. For example, elastomeric rings may be employed as ligatures to secure an archwire in a slot of a bracket. As another example, elongated elastomeric devices (e.g., a chain of interconnected elastomeric ligatures) may be stretched between selected brackets in order to move certain teeth relative to other teeth. Yet other spring devices may be specifically designed to separate adjacent teeth or to rotate a tooth about its longitudinal axis.

    [0005] The orthodontic treatment of some patients includes correction of the alignment of the maxillary dental arch and the mandibular dental arch. For example, certain patients have a condition referred to as a Class II malocclusion where the lower dental arch is located an excessive distance rearward of the upper dental arch when the jaws are closed. Other patients may have an opposite condition referred to as a Class III malocclusion wherein the lower dental arch is located forward of the upper dental arch when the jaws are closed.

    [0006] Orthodontic treatment of Class II and Class III malocclusions typically entails movement of the maxillary dental arch (e.g., teeth comprising the maxillary arch) and/or movement of the mandibular dental arch (e.g., teeth comprising the mandibular arch). For such purposes, an activation force is often applied to teeth of each dental arch by applying a force to brackets, archwire or attachments connected to the brackets or archwires. These orthodontic appliances promote malocclusion treatment by restraining jaw movement which results in the biological response by the jaw and facial muscles that progressively corrects the malocclusion.

    [0007] Additional forces can be added to the orthodontic appliance to apply a further corrective force that accelerate treatment and provide a biasing force as the patient reaches ends of the range of motion for the orthodontic appliance, adding to patient comfort. However, current solutions in orthodontic appliances suffer from problems with breakage and disengagement between the components of the orthodontic appliance particularly if the patient opens their mouth beyond the functional range of the appliance or if appliance components are disengaged due to an external force. Solutions to these problems reduce patient comfort by extending the appliance beyond lengths needed to carry out treatment.

    [0008] Orthodontic appliances generally extend between two or more teeth in the patient's dentition to apply the corrective forces. The orthodontic appliance can be secured on or about a tooth using a variety of techniques. Each of these techniques create significant drawbacks when an orthodontist desires to add an orthodontic appliance to the treatment of a patient once the patient has already been treated with braces (e.g., an archwire and brackets and/or buccal tubes). At a minimum, the addition of the orthodontic appliance requires complete or partial removal of the archwire such as to connect the orthodontic appliance to the archwire In other cases, the existing bracket or buccal tube must be removed and replaced in order to add a specialized bracket or buccal tube or to add a molar band on the patient's tooth before replacing the buccal tube. All of this work takes orthodontist and patient time, increases treatment cost, and is discomforting to the patient. Furthermore, if an orthodontic appliance is to be removed, replaced, or repaired, often similar steps are required at the expense of time, money, and patient comfort.

    [0009] The prior art forming the starting point of the invention comes from US 5,829,975 A. This orthodontic appliance comprises a telescopic assembly comprising at least an end tube with a hollow interior and a telescopic member telescopically disposed within the end tube; a distal connector secured to the end tube at a generally distal end of the telescopic assembly; a mesial connector secured to a generally mesial end of the telescopic assembly; an end cap that engages the distal end of the end tube; a spring secured at a distal end to the end cap and the spring extends away from the end cap coaxially within the end tube, the spring configured to impart a biasing force against the end cap and the telescopic member.

    [0010] The object of the present invention is to improve the above mentioned prior art orthodontic appliance.

    [0011] The object is met with the orthodontic appliance and has the features of the characterizing part of claim 1 along with the features of the introductory part of claim 1.

    [0012] The orthodontic appliance according to the invention also includes a telescopic assembly comprising at least an end tube with a hollow interior and first telescopic member telescopically disposed within the end tube. A distal connector is secured to the end tube at a generally distal end of the telescopic assembly. A mesial connector is secured to a generally mesial end of the telescopic assembly,

    [0013] A cover having a generally tubular shape is configured to removably engage and at least partially surround at least a portion of the end tube. The distal connector radially extends through a cutout in the cover. An end cap is secured to a distal end of the cover. The end cap removably engages a distal end of the end tube. A spring is secured at a distal end to the end cap and the spring extends away from the end cap coaxially within the cover and the end tube. The spring is configured to impart a biasing force against the end cap and a distal end of the telescopic member. Preferred modifications, improvements and additions are the subject matter of dependent claims 2 to 13.

    [0014] Hereafter details of the invention are explained with reference to the drawings. In the drawings:
    Fig 1:
    depicts a side view of a non-claimed embodiment of an orthodontic appliance.
    Fig. 2:
    is a bottom view of the non-claimed embodiment of an orthodontic appliance of Fix-1.
    Fig. 3:
    depicts a side view of a non-claimed alternative embodiment of an orthodontic appliance.
    Fig. 4:
    depicts a bottom view of the non-claimed alternative embodiment of an orthodontic appliance of Fig. 3.
    Fig. 5:
    depicts a partial cutaway view taken along line 5-5 of Fig. 1.
    Fig. 6:
    is a cut away view of an alternative embodiment of the orthodontic appliance of Fig. 1 that includes integral connection screws.
    Fig. 7:
    is an isometric view of an exemplary embodiment of a telescopic orthodontic appliance according to the invention.
    Fig. 8:
    is a cutaway view of the exemplary alternative embodiment of a telescoping orthodontic appliance of Fig. 7 taken along line 7-7.
    Fig. 9:
    is an isometric view of a first exemplary embodiment of an archwire connector.
    Fig. 10:
    is a side view of the first exemplary embodiment of the archwire connector of Fig. 9.
    Fig. 11:
    is an isometric view of an exemplary alternative embodiment of an archwire connector.
    Fig. 12:
    is an isometric view of a third exemplary embodiment of an archwire connector.
    Fig. 13:
    is a side view of the third exemplary embodiment of Fig. 12.
    Fig. 14:
    is an isometric view of a fourth exemplary alternative embodiment of an archwire connector.


    [0015] Figs. 1 and 2 depict an embodiment of an orthodontic appliance 10 which is exemplarily a class II corrector configured to treat over bite malocclusions. It will be understood that while a class II corrector is used exemplarily herein, embodiments as disclosed herein may apply to other orthodontic appliances. The orthodontic appliance 10 is designed in a telescoping manner from a distal end to a mesial end with an end tube 12, a middle tube 14, and a rod 16. The telescoping configuration of these components can be seen in greater detail in Fig. 5, which is a cutaway view of the orthodontic appliance 10 of Fig 1 taken along line 5-5. It is to be noted that in embodiments respective mesial/distal ends of adjacent telescoping components are configured such that the components are retained in a telescoping manner, exemplarily such that the end tube 12, middle tube 14 and rod 16 are not separable from the orthodontic appliance 10.

    [0016] Referring back to Fig. 1, the orthodontic appliance 10 includes a mesial connector 18 and a distal connector 20. In a non-limiting embodiment, the mesial connector 18 and the distal connector 20 are eyelets configured to receive a screw therethrough that secures the connector to the braces on the patient. In a non-limiting embodiment, the mesial connector 18 is configured to secure to or about the cuspid on the lower jaw, while the distal connector 20 is configured to be secured on or about the first molar of the upper jaw; however, it will be recognized that in alternative embodiments, the exact positioning of the appliance within the mouth of the patient may be made between other positions. The mesial connector 18 and the distal connector 20 may be secured on or about the respective teeth of the patient in a variety of ways, including, but not limited to, connection to direct bonded or band bonded buccal tubes, direct connections to molar bands, or connections to archwires at a location near the tooth.

    [0017] The embodiment of the orthodontic appliance 10 depicted in Figs. 1, 2, and 5 includes an exemplary location of the distal connector 20 and represents a generally mesial orientation for the distal connector 20. In the mesial orientation of the distal connector 20, the end tube 12 extends distally beyond the distal connector 20 and terminates in an end cap 22. The end cap 22 closes the distal end of the end tube 12 and secures a spring 24 within the end tube 12. The spring is configured to be of a dimension that fits within the inside diameter of the end tube 12 yet is constructed in order to produce the desired treatment force. The spring 24 specifically applies a force between the end cap 22 and a distal end 26 of the middle tube 14. This specifically applies the additional treatment force on the patient's lower jaw as the patient's lower jaw reaches a closed position. Previous solutions had placed incremental mechanical stops, exemplarily on the rod 16, in order to progressively limit lower jaw movement. However, the inventors have discovered that this adds to patient discomfort as the mechanical stops provide an abrupt end to lower jaw movement whereas the spring 24 begins to progressively apply a resilient force against lower jaw movement as the patient's lower jaw closes.

    [0018] In exemplary embodiments, the spring 24 may apply 400 grams of force, while in other embodiments, the spring may apply 200 grams of force or 240 grams of force; however, other spring forces are considered to be within the scope of the present disclosure. In further exemplary embodiments, different spring lengths may carry out different treatment effects, such as controlling the effective spring engagement range when the additional spring force is applied as the patient closes the patient's jaw.

    [0019] Figs. 3 and 4 depict an alternative embodiment of an orthodontic appliance 30. It should be noted in Figs. 3 and 4 like reference numerals have been used to identify like features from the description above with respect to Figs. 1, 2 and 5 for the purposes of conciseness. The orthodontic appliance 30 differs from the orthodontic appliance 10 in that the distal connector 32 of the orthodontic appliance 30 is located at the far distal end of the end tube 12. In the orthodontic appliance 30, the distal connector 32 also serves the function previously performed by the end cap 22 in the orthodontic appliance 30 in that the distal connector 32 seals a distal end of the end tube 12.

    [0020] The inventors have found that the embodiment of the orthodontic appliance 30 provides still further advantages to the field of orthodontic appliances. The orthodontic appliance 30 provides the further advantage of aligning the attachment points of the orthodontic appliance with the spring force applied by the spring (not depicted) internal to the end tube 12. This alignment of the orthodontic appliance connection points with the additional treatment force provided by this spring aids treatment by eliminating or reducing a lever force created by the offset between the treatment force and the connection points in previous designs. Additionally, with the distal connector 32 at the distal end of the orthodontic appliance 10, the orthodontic appliance 30 does not extend distally of the connection point to promote patient comfort by making the orthodontic appliance 30 more compact within the mouth of the patient.

    [0021] It is to be understood that the exemplary embodiments of the orthodontic appliance shown in Figs. 1-5 are merely exemplary of placements of the distal connector. In other embodiments, the distal connector may be located at any position between the two distal connector positions as exemplarily shown between Figs. 1 and 3. In a further non-limiting embodiment (not depicted), the distal connector may extend at exemplarily a 45° angle from the end tube such as to balance between the embodiments depicted.

    [0022] It is further to be noted that, while not depicted, in embodiments wherein the distal connector is not located at the distal end of the orthodontic appliance, the end tube of the orthodontic appliance may be open at the distal end of the end tube. In such embodiment, the distal end of the end tube may include a crimp or lip (not depicted) that retains the spring within the end tube of the orthodontic appliance.

    [0023] Embodiments of the presently disclosed orthodontic appliance present still further embodiments over currently available solutions. Specifically, by enclosing the end tube 12 and enclosing the spring 24 within the end tube 12, these known traps for food and/or bacteria are eliminated, resulting in an orthodontic appliance that is easier for a patient to clean and may reduce bacteria growth in the patient's mouth about the orthodontic appliance. By enclosing the spring within the telescoping orthodontic appliance, the spring, which is known to be difficult to clean and a harbor for food and/or bacteria is limited from access to food and/or bacteria, while closing the distal end of the end tube further limits food and bacteria access to the interior of the end tube and/or middle tube, limiting these locations as regions for bacteria growth.

    [0024] Fig. 6 depicts an exemplary alternative embodiment of an orthodontic appliance 34 in which the distal connector 36 and the mesial connector 38 further include an integral connection screw 40. The integral connection screws 40 may be in the form of a cup-and-ball configuration with the distal connector 36 and the mesial connector 38. In some embodiments, such a cup-and-ball arrangement promotes patient comfort by providing an extra degree of movement between the orthodontic appliance and the patient's dentition while not compromising the corrective treatment provided by the orthodontic appliance 34. Such an integral configuration further reduces orthodontists' time in assembling the orthodontic appliance while eliminating the risk that an orthodontist drops a screw into the patient's mouth during installation or removal of the orthodontic appliance. In some embodiments, the connection screws 40 include hexalobular fasteners which shape gives increased resilience of the screw head to stripping from the driver or fastener head.

    [0025] Embodiments of the connection screws 40 are configured to secure to a variety of threaded mounts to secure the orthodontic appliance relative to the patient's dentition. These threaded mounts may include threaded connections integrated with a buccal tube or bracket mounted to a tooth, a band secured around a tooth, or may be integrated with a connector secured to an archwire. Exemplary embodiments of archwire connectors are disclosed herein.

    [0026] In exemplary uses of embodiments of the orthodontic appliances depicted in Figs. 1-6, an orthodontist may progress treatment by interchangeably replacing the orthodontic appliance with another orthodontic appliance of a plurality of available orthodontic appliances. Each alternative orthodontic appliance may vary in the spring disposed within the end tube such that differing forces or effective engagement ranges are achieved by different orthodontic appliances. The combinational use of the orthodontic appliance with archwire connectors as disclosed in greater detail herein may further facilitate this interchangeability.

    [0027] Fig, 7 depicts an orthodontic appliance 50 according to claim 1 which is exemplarily a class II corrector configured to treat over bite malocclusions. The orthodontic appliance 50 is designed in a telescoping manner from a distal end to a mesial end with a plurality of telescoping members, exemplarily an end tube 52, a middle tube 54, and a rod 56. The telescoping configuration of these components can be seen in greater detail in Fig. 8, which is a cutaway view of the orthodontic appliance 50 of Fig. 7 taken along line 7-7.

    [0028] Referring back to Fig. 7, the orthodontic appliance 50 includes a mesial connector 58 and a distal connector 60. In the non-limiting embodiment depicted, the mesial connector 58 and distal connector 60 have integrated screws 62 in a cup-and-ball configuration to join the screw 62 to the orthodontic appliance as described above with respect to Fig. 6

    [0029] The mesial connector 58 and the distal connector 60 operate to secure the orthodontic appliance 50 to the braces on the patient. In a non-limiting embodiment, the mesial connector 58 is configured to secure to or about the cuspid on the lower jaw, while the distal connector 60 is configured to be secured on or about the first molar of the upper jaw; however, it will be recognized that in alternative embodiments, the exact positioning of the appliance within the mouth of the patient may be made between other positions. The mesial connector 58 and the distal connector 60 may be secured on or about the respective teeth of the patient in a variety of ways, including, but not limited to, connection to direct bonded or band bonded buccal tubes, direct connections to molar bands, or connections to archwires at a location near the tooth.

    [0030] Fig. 8 is a cutaway view of the orthodontic appliance of Fig. 7 taken along line 7-7. The cutaway view of Fig. 8 shows the telescoping nature of the end tube 52, middle tube 54, and rod 56 of the orthodontic appliance 50 in better detail. A spring 64 is disposed interior to the end tube 52. The spring 64 is configured to be of a dimension that fits within the inside diameter of the end tube 52, yet is constructed in order to produce the desired treatment force as described in further detail herein. The spring 64 specifically applies a force against a distal end 66 of the middle tube 54 which applies an additional treatment force on the patient's lower jaw as the patient's lower jaw reaches a closed position. Previous solutions have placed incremental mechanical stops (not depicted), exemplarily on the rod 56, in order to progressively limit lower jaw movement as the patient's treatment progressed. However, this adds to patient discomfort as mechanical stops provide an abrupt end to lower jaw movement whereas the spring 64 begins to progressively apply a resilient force against lower jaw movement as the patient's lower jaw closes.

    [0031] The spring 64 is secured at a distal end to an end cap 68 that secures about an open distal end of the end tube 52. The end cap 68 exemplarily includes a lip 70 that is configured to retain the spring 64 in connection with the end cap 68. The end cap 68 is connected to a cover 72 that extends about at least a portion of the end tube 52. In an embodiment, the cover 72 is shaped in a generally tubular configuration to fit the end tube 52. Thus, in embodiments, the spring 64, end cap 68, and cover 72 are secured to one another as an interchangeable spring assembly 80, such that these components can be moved together. Specifically, in embodiments, the combined cover 72, end cap 68, and spring 64 are removable from connection with the end tube 52.

    [0032] In embodiments, a plurality of separate configurations of interchangeable spring assemblies 80 which each comprise springs, end caps, and covers as described herein are available for use by an orthodontist. Each assembly may include a spring of a varying spring length and/or force such as to impart differing treatment effects; these effects could differ in range of effective spring engagement, a degree of corrective force, or a combination thereof. As described in further detail herein, an orthodontist may choose to use a combination of spring lengths over the course of orthodontic treatment with different spring lengths and/or forces being used at different stages of the treatment. Alternatively, an orthodontist may select from the varying lengths of springs and/or forces in order to customize the orthodontic treatment to the corrective action required by a specific patient.

    [0033] In embodiments, the cover 72 is configured such as to facilitate removal and replacement of the interchangeable spring assembly 80 from connection with the end tube 52. Such configuration of the cover 72 may include a key slot 74 that is configured to enable a portion of the cover 72 to slide past the distal connector 60, and a latch 76 or other retaining device that secures the cover 72 in relation to the distal connector 60. In a non-limiting example depicted in Figs. 7 and 8, the cover 72 further includes a cut out 78 through which the distal connector 60 extends. The distal connector 60 is received within the cut out 78. The latch 76 retains the distal connector 60 in the cut out 78. In use, the interchangeable spring assembly 80 is coaxially connected with the end tube 52 and is translated with respect to the end tube 52 such that the distal connector 60 passes through the key slot 74 in the cover 72. Once the distal connector 60 is distal of the key slot 74, the cover 72 is rotated about the end tube 52 such that the latch 76 engages the distal connector 60, retaining the distal connector 60 within the cut out 78. This process inserts the spring 64 into the open interior of the end tube 52 and arranges the spring 64 in the proper alignment for operation with the middle tube 54. This process further engages the open distal end of the end tube 52 with the end cap 68, closing off the open distal end of the end tube 52.

    [0034] The process is generally reversed in order to remove the interchangeable spring assembly 80 as described in further detail herein. In order to facilitate removal, the cover 72 can include a projection 82 that is configured to be engaged by a finger or tool of an orthodontist in order to disengage the latch 76 from the distal connector 60.

    [0035] In an embodiment, the end cap 68 may be configured with identifying information, including, but not limited to, an indication of the spring length to which the end cap 68 is connected and/or a configuration of orthodontic appliance for which the interchangeable spring assembly 80 is configured. As a non-limiting example, the end cap 68 may include an indication that such assembly is configured for use on the right hand side of a patient's mouth as opposed to configured for use on a left hand side of a patient's mouth. In one non-limiting embodiment, the end cap may convey such information through the use of alpha numeric indicators or by color coding, or some other indication system.

    [0036] In exemplary embodiments, spring 64 may apply 400 grams of force, while in other non-limiting embodiments, the spring may apply 200 grams of force, or 240 grams of force; however, other spring forces are to be considered within the scope of the present disclosure. In embodiments, the spring force may be consistent across a variety of offered spring lengths, and therefore in some embodiments the differences between the corrective therapy applied by each of the variety of available springs is based upon differences in available spring lengths, and the resulting difference in effective spring engagement range. In still further embodiments, both spring force and spring length may be varied.

    [0037] Embodiments of the orthodontic appliances disclosed herein present the advantage of providing a telescopic orthodontic appliance with interchangeable activation springs that due to the configuration of the interchangeable spring assembly 80 can be easily changed either for purposes of replacement or to change the length of the spring used with the orthodontic appliance without replacing the orthodontic appliance itself or, in embodiments, without disconnecting the orthodontic appliance 50 from connection to the braces in the mouth of the patient. The features of the cover 72 as disclosed herein enable the interchangeable spring assembly 80 to engage and disengage from the orthodontic appliance while the orthodontic appliance remains in place.

    [0038] As best depicted in Figs. 6-8, embodiments of orthodontic appliances disclosed herein may have distal connectors and mesial connectors that include screws which are integral to the orthodontic appliance such as using a cup-and-ball configuration described above in order to join the screws to the orthodontic appliance, This promotes patient comfort by providing an extra degree of movement between the orthodontic appliance and the patient's dentition while not compromising the corrective treatment provided by the orthodontic appliance. This extra degree of movement can further facilitate the exchange of interchangeable spring assemblies while maintaining the attachment of the mesial and distal connectors to the patient's braces or dentition. Such an integral configuration further reduces orthodontist time in assembling the orthodontic appliance while eliminating the risk that the orthodontist drops a screw into the patient's mouth during installation or removal of the orthodontic appliance. It is also to be recognized that in embodiments, the screws have hexalobular fasteners which shape gives increased resilience of the screw head to stripping from the driver or fastener head.

    [0039] Fig. 9 depicts an exemplary embodiment of an archwire connector 100. The archwire connector 100 is configured to facilitate the connection of the orthodontic appliance to an archwire of the patient's braces. Fig. 9 exemplarily depicts the mesial connector 58 of the orthodontic appliance shown in Figs. 6-8; however, it will be recognized that this is for exemplary purposes and alternative archwire connector embodiments similar to those as depicted and described herein may similarly be used in conjunction with any of the embodiments of distal connectors, mesial connectors, and other alternative embodiments of orthodontic appliances within the scope of the present disclosure, including any of those embodiments depicted in Figs. 1-8.

    [0040] Fig. 10 is a side view of the embodiment depicted in Fig. 9. The archwire connector 100 includes a connector body 102 that has a threaded through-hole 104 configured to receive the screw 62 of the mesial connector 58. The archwire connector 100 further includes a wire slot 106 defined at least in part by a lip 108. As depicted in Fig. 10, the wire slot 106 and lip 108 are configured such as to at least partially surround an archwire 110 (shown in cross section in Fig. 10) at a location defined by the wire cut-out 106 and the screw 62. In an embodiment, the screw 62, when extending through the through-hole 104 obstructs the wire cut-out 106 in a way such as to movably restrain the archwire 110 within the archwire slot 106. It will be recognized that in one embodiment, the screw 62 may fixedly secure the archwire connector 100 to the archwire 110, or in a still further exemplary embodiment, the screw 62 may have multiple positions within the through-hole 104 such that in a first position the archwire connector 100 is free to be moved into and out of engagement with the archwire 110, while in a second position, the archwire connector 100 is free to translate along the archwire 110 with the archwire 110 retained in the wire slot 106, while in a third position of the screw 62, the archwire connector 100 is fixedly secured to the archwire.

    [0041] In use, the orthodontist may hang the archwire connectors 100 on the patient's installed archwire 110, without removing or partially removing the archwire 100 from engagement with any of the buccal tubes or brackets (not depicted) in the patient's braces and then the orthodontist can engage the through-hole 104 of the archwire connectors 100 with the screws 62 of the orthodontic appliance. In an alternative embodiment, the orthodontist may secure the archwire connectors 100 to the screws 62, such as in the above described exemplary first position, and then engage the patient's archwire 100 with the wire slots 106 of the archwire connector 100 before tightening the screws 62 in order to retain the archwire within the wire slot 106. In either embodiment, the orthodontist need not disengage the archwire from any of the buccal tubes or brackets already secured to the patient's teeth and therefore the archwire connector 100 facilitates placement of the orthodontic appliance, Removal of the orthodontic appliance either due to the end of treatment, or to replace or repair the orthodontic appliance is similarly facilitated as the orthodontist need only to reverse the steps to remove the archwire connector 100 from engagement with the patient's archwire.

    [0042] Fig. 11 depicts an alternative embodiment of an archwire connector 112. The archwire connector 112 further replaces the mesial connector depicted in Fig. 9 and is directly connected to the rod 56 of the orthodontic appliance. It is to be understood that in embodiments, the archwire connector 112 may be fixedly or movably secured to the rod 56. The archwire connector 112 includes opposed resilient arms 114 that are made of a resilient material, such that the resilient arms 114 are flexible enough such as to deform around an archwire such as to place an archwire (not depicted) within an archwire bore 116 of the archwire connector 112. It is to be recognized that embodiments, the archwire bore 116 may be dimensioned in a manner such as to either fixedly or movably engage the archwire. In a non-limiting embodiment, if the archwire bore 116 is dimensioned such as to movably engage the archwire, in one such embodiment, the archwire connector 112 translates along the archwire, exemplarily between two orthodontic brackets bonded to teeth of the patient.

    [0043] In a non-limiting embodiment, the resilient arms 114 may be constructed of a nickel titanium alloy or other such alloy or material that is both easily manipulated by the orthodontist to engage the archwire, while retaining its shape in a sufficient capacity such as to sufficiently secure the end of the orthodontic appliance to the archwire.

    [0044] Figs. 12 and 13 depict a still further exemplary embodiment of an archwire connector 118. The archwire connector 118 combines elements of the embodiments depicted in Figs. 9-11 in that the archwire connector 118 includes a pair of resilient arms 114 that are configured as described above with respect to Fig. 11 to resiliently deform to accept the archwire within an archwire bore 116. The archwire connector 118 is secured to the orthodontic appliance by way of a threaded connection 120 configured to receive the screw 62 of the mesial connector 58. Thus, the archwire connector 118 may be used in a similar manner as described above with respect to the archwire connector 100 in that the archwire connector 118 may either be first removably secured to the archwire (not depicted) and then the threaded bore 120 engaged with the screw 62 of the mesial connector 58 or that the archwire connector 118 may be threadedly secured to the mesial connector 58 prior to orthodontist installation of the orthodontic appliance, and then the resilient arms 114 of the archwire connector 118 used to removably secure the mesial connector 58 to the archwire.

    [0045] Fig. 14 depicts an exemplary embodiment of a still further alternative embodiment of an archwire connector 122 similar to the archwire connector 112 depicted in Fig. 11, in that the archwire connector 122 is a clip made of a resilient material that can deform in order to receive the archwire within the open interior 124 of the archwire connector 122 and then return to an original shape of the archwire connector 122 in order to retain the archwire within the archwire connector 122. The archwire connector 122 is secured to the rod 56 of the orthodontic appliance exemplarily by welding or brazing, although other types of connections may be used within the scope of the disclosure. In one feature of the exemplary embodiment, the archwire connector 122 depicted in Fig. 14 is that an opening 128 of the archwire connector 122 is directed downwardly such that the orthodontic appliance is connected to the archwire using the archwire connector 122 with a downward motion relative to the archwire, which in some embodiments may facilitate installation of the orthodontic appliance.

    [0046] Embodiments of the archwire connector as disclosed herein provide advantages over previous solutions for the connection of orthodontic appliances in that the archwire connectors as disclosed herein facilitate the attachment and removal of the orthodontic appliance to and from the patient's already installed archwire, without complete or partial removal of the archwire, or the removal of existing brackets or buccal tubes and replacement with specialized brackets, buccal tubes, or bands for securing the orthodontic appliance.

    [0047] This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to make and use the invention. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art.


    Claims

    1. An orthodontic appliance (50) comprising:

    a telescopic assembly comprising at least an end tube (52) with a hollow interior and a telescopic member (54) telescopically disposed within the end tube (52);

    a distal connector (60) secured to the end tube (52) at a generally distal end of the telescopic assembly;

    a mesial connector (58) secured to a generally mesial end of the telescopic assembly;

    an end cap (68) that engages the distal end of the end tube (52);

    a spring (64) secured at a distal end to the end cap (68) and the spring (64) extends away from the end cap (68) coaxially within the end tube (52), the spring (64)configured to impart a biasing force against the end cap (68) and the telescopic member (54),

    characterized in that.

    the appliance further comprises

    a cover (72) having a generally tubular shape and configured to removably engage and at least partially surround at least a portion of the end tube (52) and the distal connector (60) radially extends through a cut out (78) in the cover (72)

    wherein the end cap (68) is secured to a distal end of the cover (72) and the end cap (68) removably engages the distal end of the end tube (52) and the spring (64) is interchangeable with at least one alternative spring configured to impart an alternative biasing force against the end cap (68) and the telescopic member (54).


     
    2. The orthodontic appliance of claim 1, characterized in that
    the cover (72), end cap (68), and spring (64) are coupled together as an interchangeable spring assembly.
     
    3. The orthodontic appliance of claims 2, characterized in that
    the cover (72) further comprises a key slot (74), through which the distal connector (60) is slidably received to position the distal connector (60) within the cut out (78).
     
    4. The orthodontic appliance according to any one of the preceding claims, characterized in that
    it further comprises at least one latch (76) projecting from the cover (72), the at least one latch (76) releasably engages the distal connector (60) to releasably secure the cover (72), end cap (68), and spring (64) to the telescopic assembly.
     
    5. The orthodontic appliance of claim 4, characterized in that
    it further comprises a projection (82) extending from the cover (72), the projection (82) facilitates the application of a force to disengage the at least one latch (76) from the distal connector (60) during removal of the cover (72), end cap (68), and spring (64).
     
    6. The orthodontic appliance according to claim 2 and optionally to any one of the claims 3 to 5, characterized in that
    it further comprises a plurality of interchangeable spring assemblies, each interchangeable spring assembly of the plurality comprising a spring configured to impart an alternative biasing force against the distal end of the telescopic member.
     
    7. The orthodontic appliance according to claim 6, characterized in that
    the end cap of each of the plurality of interchangeable spring assemblies further comprises an indicia indicative of the alternative biasing force of the spring of each of the plurality of interchangeable spring assemblies.
     
    8. The orthodontic appliance according to any one of the preceding claims, characterized in that
    the distal connector (60) and the mesial connector (58) are configured to couple to respective positions on a dentition of a patient and the cover (72)is removable from engagement with the end tube (52) while maintaining the coupling between the distal connector (60), the mesial connector (58) and the dentition of the patient.
     
    9. The orthodontic appliance according to any one of the preceding claims, characterized in that
    the at least one alternative spring is configured to impart an alternative effective engagement range.
     
    10. The orthodontic appliance according to any one of the preceding claims, characterized in that
    it further comprises a first archwire connector (100) coupled to the distal connector (60) and a second archwire connector (118) coupled to the mesial connector (58), the archwire connectors releasably at least partially surround a respective archwire (110) to secure the orthodontic appliance to at least one archwire (110).
     
    11. The orthodontic appliance according to claim 10, characterized in that
    the distal connector (60) and the mesial connector (58) further comprise respective screws (62) and the first and second archwire connectors (100; 118) comprise threaded throughholes (104) and a wire slot (106) defined by a lip (108), the respective archwire (110) is received within the wire slot (106) and secured within the wire slot (106) by the respective screw (62) that extends though the threaded throughole (104) to at least partially obstruct the wire slot (106).
     
    12. The orthodontic appliance according to claim 10, characterized in that
    the distal connector (60) and the mesial connector (58) further comprise respective screws (62) and the first and second archwire connectors (112; 118) comprise threaded holes (104) and a pair of resilient arms (114) defining an archwire bore (116), the respective archwire is received within the archwire bore (116) and the respective screw (62) are threadedly received in the threaded holes (104) to secure the archwire connectors to the distal connector (60) and the mesial connector (58).
     
    13. The orthodontic appliance according to any one of the preceding claims, characterized in that
    the telescopic member (54) is a middle tube and the telescopic assembly further comprises a rod (56) telescopically disposed within the middle tube (54) and the end tube (52), the telescopic rod (56) forming the mesial end (58) of the telescopic assembly.
     


    Ansprüche

    1. Orthodontische Einrichtung (50), umfassend:

    eine teleskopische Anordnung, umfassend zumindest ein Endrohr (52) mit einem hohlen Innenraum und einem teleskopischen Element (54), das teleskopisch in dem Endrohr (52) angeordnet ist;

    ein distales Verbindungsglied (60), das an dem Endrohr (52) an einem allgemein distalen Ende der teleskopischen Anordnung befestigt ist;

    ein mesiales Verbindungsglied (58), das einem allgemein mesialen Ende der teleskopischen Anordnung befestigt ist;

    eine Endkappe (68), die in das distale Ende des Endrohrs (52) eingreift;

    eine Feder (64), die an einem distalen Ende der Endkappe (68) befestigt ist und wobei sich die Feder (64) von der Endkappe (68) koaxial in der Endkappe (52) weg erstreckt, wobei die Feder (64) ausgelegt ist, eine Vorspannungskraft gegen die Endkappe (68) und das teleskopische Element (54) auszuüben,

    dadurch gekennzeichnet, dass

    die Einrichtung ferner Folgendes umfasst:

    eine Abdeckung (72), die eine allgemein röhrenförmige Gestalt aufweist und ausgebildet ist, entfernbar in zumindest einen Abschnitt des Endrohrs (52) einzugreifen und diesen zumindest teilweise zu umgeben, und wobei sich das distale Verbindungsglied (60) radial durch einen Ausschnitt (78) in der Abdeckung (72) erstreckt,

    wobei die Endkappe (68) an einem distalen Ende der Abdeckung (72) befestigt ist und die Endkappe (68) entfernbar in das distale Ende des Endrohrs (52) eingreift und die Feder (64) mit zumindest einer alternativen Feder austauschbar ist, die ausgelegt ist, eine alternative Vorspannungskraft gegen die Endkappe (68) und das teleskopische Element (54) auszuüben.


     
    2. Orthodontische Einrichtung nach Anspruch 1, dadurch gekennzeichet, dass
    die Abdeckung (72), die Endkappe (68) und die Feder (64) alls austauschbare Federanordnung miteinander verbunden sind.
     
    3. Orthodontische Einrichtung nach Anspruch 2, dadurch gekennzeichnet, dass
    die Abdeckung (72) ferner eine Keilnut (74) umfasst, durch die das distale Verbindungsglied (60) gleitend aufgenommen wird, um das distale Verbindungsglied (60) in dem Ausschnitt (78) zu positionieren.
     
    4. Orthodontische Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ferner zumindest einen Riegel (76) umfasst, der von der Abdeckung (72) vorragt, wobei der zumindest eine Riegel (76) lösbar in das distale Verbindungsglied (60) eingreift, um die Abdeckung (72), die Endkappe (68) und die Feder (64) lösbar an der teleskopischen Anordnung zu befestigen.
     
    5. Orthodontische Einrichtung nach Anspruch 4, dadurch gekennzeichnet, dass
    sie ferner einen Vorsprung (82) umfassen der sich von der Abdeckung (72) erstreckt, wobei der Vorsprung (82) das Aufbringen von Kraft zum Lösen des Eingriffs des zumindest einen Riegels (76) mit dem distalen Verbindungsglied (60) bei der Entfernung der Abdeckung (72), der Endkappe (68) und der Feder (64) erleichtert.
     
    6. Orthodontische Einrichtung nach Anspruch 2 und optional nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass
    sie ferner eine Vielzahl von austauschbaren Federanordnungen umfasst, wobei jede austauschbare Federanordnung der Vielzahl eine Feder umfasst, die ausgelegt ist, eine alternative Vorspannungskraft gegen das distale Ende des teleskopischen Elements auszuüben.
     
    7. Orthodontische Einrichtung nach Anspruch 6, dadurch gekennzeichnet, dass
    die Endkappe jeder der Vielzahl von austauschbaren Federanordnungen ferner eine Markierung umfasst, die auf die alternative Vorspannungskraft der Feder jeder der Vielzahl von austauschbaren Federanordnungen hinweist.
     
    8. Orthodontische Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das distale Verbindungsglied (60) und das mesiale Verbindungsglied (58) ausgelegt sind, mit jeweiligen Positionen auf der Dentition eines Patienten verbunden zu werden, und die Abdeckung (72) aus ihrem Eingriff mit dem Endrohr (52) entfernt werden kann, während die Verbindung zwischen dem distalen Verbindungsglied (60), dem mesialen Verbindungsglied (58) und der Dentition des Patienten aufrechterhalten wird.
     
    9. Orthodontische Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine alternative Feder ausgelegt ist, einen alternativen wirksamen Eingriffsbereich zu verleihen.
     
    10. Orthodontische Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ferner ein erstes Bogendraht-Verbindungsglied (100), das mit dem distalen Verbindungsglied (60) verbunden ist, und ein zweites Bogendraht-Verbindungsglied (118), das mit dem mesialen Verbindungsglied (58) verbunden ist, umfasst, wobei die Bogendraht-Verbindungsglieder einen jeweiligen Bogendraht (110) zumindest teilweise lösbar umgeben, um die orthodontische Einrichtung an zumindest einem Bogendraht (110) zu befestigen.
     
    11. Orthodontische Einrichtung nach Anspruch 10, dadurch gekennzeichnet, dass
    das distale Verbindungsglied (60) und das mesiale Verbindungsglied (58) ferner jeweilige Schrauben (62) umfassen und die ersten und zweiten Bogendraht-Verbindungsglieder (100; 118) durchgehende Gewindelöcher (104) und einen von einer Lippe (108) definierten Drahtschlitz (106) umfassen, wobei der jeweilige Bogendraht (110) in dem Drahtschlitz (106) aufgenommen wird und in dem Drahtschlitz (106) durch die jeweilige Schraube (62) fixiert wird, die sich durch das durchgehende Gewindeloch (104) erstreckt, um den Drahtschlitz (106) zumindest teilweise zu blockieren.
     
    12. Orthodontische Einrichtung nach Anspruch 10, dadurch gekennzeichnet, dass
    das distale Verbindungsglied (60) und das mesiale Verbindungsglied (58) ferner jeweilige Schrauben (62) umfassen und die ersten und zweiten Bogendraht-Verbindungsglieder (112; 118) Gewindelöcher (104) und ein Paar von nachgiebigen Armen (114) umfassen, die eine Bogendrahtbohrung (116) definieren, wobei der jeweilige Bogendraht in der Bogendrahtbohrung (116) aufgenommen wird und die jeweilige Schrauben (62) gewindemäßig in den Gewindelöchern (104) aufgenommen werden, um die Bogendraht-Verbindungsglieder an dem distalen Verbindungsglied (60) und dem mesialen Verbindungsglied (58) zu befestigen.
     
    13. Orthodontische Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass
    das teleskopische Element (54) ein mittleres Rohr ist und die teleskopische Anordnung ferner eine Stange (56) umfasst, die teleskopisch in dem mittleren Rohr (54) und dem Endrohr (52) angeordnet ist, wobei die Teleskopstange (56) das mesiale Ende (58) der teleskopischen Anordnung bildet.
     


    Revendications

    1. Appareil orthodontique (50) comprenant :

    un ensemble télescopique comprenant au moins un tube terminal (52) ayant un intérieur creux et un élément télescopique (54) disposé de façon télescopique dans le tube terminal (52) ;

    un conjoncteur distal (60) solidement fixé sur le tube terminal (52) à une extrémité dans l'ensemble distale de l'ensemble télescopique ;

    un conjoncteur mésial (58) solidement fixé à une extrémité dans l'ensemble mésiale de l'ensemble télescopique ;

    un embout (68) qui s'applique sur l'extrémité distale du tube terminal (52) ;

    un ressort (64) solidement fixé à une extrémité distale de l'embout (68), le ressort (64) s'étendant coaxialement depuis l'embout (68) à l'intérieur du tube terminal (52) et étant configuré pour appliquer une force de sollicitation contre l'embout (68) et l'élément télescopique (54),

    caractérisé en ce que l'appareil comprend en outre un capot (72) ayant une forme dans l'ensemble tubulaire et configuré pour entrer en prise de façon amovible avec au moins une partie du tube terminal (52) et l'entourer partiellement et en ce que le conjoncteur distal (60) s'étend radialement à travers une découpe (78) dans le capot (72),
    dans lequel l'embout (68) est solidement fixé à une extrémité distale du capot (72) et entre en prise de façon amovible avec l'extrémité distale du tube terminal (52) et le ressort (64) est interchangeable avec au moins un ressort de remplacement configuré pour appliquer une force de sollicitation différente contre l'embout (68) et l'élément télescopique (54).
     
    2. Appareil orthodontique selon la revendication 1, caractérisé en ce que le capot (72), l'embout (68) et le ressort (64) sont assemblés pour constituer un ensemble ressort interchangeable.
     
    3. Appareil orthodontique selon la revendication 2, caractérisé en ce que le capot (72) comporte en outre une boutonnière (74) à travers laquelle le conjoncteur distal (60) est reçu par coulissement pour se placer à l'intérieur de à découpe (78).
     
    4. Appareil orthodontique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre au moins un loquet (76) dépassant du capot (72), ledit loquet (76) entrant en prise de façon amovible avec le conjoncteur distal (60) pour fixer de façon amovible le capot (72), l'embout (68) et le ressort (64) à l'ensemble télescopique.
     
    5. Appareil orthodontique selon la revendication 4, caractérisé en ce qu'il comprend en outre un mentonnet (82) s'étendant depuis le capot (72), le mentonnet (82) facilitant l'application d'une force pour dégager ledit loquet (76) du conjoncteur distal (60) pendant le retrait du capot (72), de l'embout (68) et du ressort (64).
     
    6. Appareil orthodontique selon la revendication 2 et facultativement selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu'il comprend en outre une pluralité d'ensembles ressorts interchangeables, chaque ensemble ressort interchangeable de la pluralité comprenant un ressort configuré pour appliquer une force de sollicitation différente contre l'extrémité distale de l'élément télescopique.
     
    7. Appareil orthodontique selon la revendication 6, caractérisé en ce que l'embout de chaque ensemble de la pluralité d'ensembles ressorts interchangeables comprend en outre des marques indiquant la force de sollicitation différente de chaque ensemble de la pluralité d'ensembles ressorts interchangeables.
     
    8. Appareil orthodontique selon l'une quelconque des revendications précédentes, caractérisé en ce que le conjoncteur distal (60) et le conjoncteur mésial (58) sont configurés pour s'accoupler à des positions respectives sur la dentition d'un patient et en ce que le capot (72) peut être dégagé du tube terminal (52) tout en maintenant l'accouplement entre le conjoncteur distal (60), le conjoncteur mesial (58) et la dentition du patient.
     
    9. Appareil orthodontique selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit ressort de remplacement est configuré pour appliquer une plage différente d'enclenchement efficace.
     
    10. Appareil orthodontique selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend en outre un premier connecteur (100) de fil métallique pour arc accouplé au conjoncteur distal (60) et un second connecteur (118) de fil métallique pour arc accouplé au conjoncteur mésial (58), les connecteurs de fil métallique pour arc entourant chacun de façon amovible au moins en partie un fil métallique pour arc (110) pour solidement fixer l'appareil orthodontique à au moins un fil métallique pour arc (110).
     
    11. Appareil orthodontique selon la revendication 10, caractérisé en ce que le conjoncteur distal (60) et le conjoncteur mésial (58) comprennent en outre chacun des vis (62) et que les premier et second connecteurs (110 ; 118) de fil métallique pour arc comprennent des trous débouchants (104) filetés et une rainure (106) pour fil délimitée par une lèvre (108) et en ce que le fil métallique pour are (110) correspondant se loge à l'intérieur de la rainure (106) pour fil où il est solidement fixé par la vis (62) correspondante qui traverse le trou débouchant (104) fileté pour obstruer au moins partiellement la rainure (106) pour fil.
     
    12. Appareil orthodontique selon la revendication 10, caractérisé en ce que le conjoncteur distal (60) et le conjoncteur mésial (58) comprennent en outre chacun des vis (62) et que les premier et second connecteurs (112 ; 118) de fil métallique pour arc comprennent des trous (104) filetés et une paires de bras (114) élastiques délimitant un alésage (116) pour fil, en ce que le fil métallique pour arc correspondant se loge à l'intérieur de l'alésage (116) pour fil et en ce que les vis (62) correspondantes se vissent dans les trous (104) filetés pour fixer solidement les connecteurs de fil métallique au conjoncteur distal (60) et au conjoncteur mésial (58).
     
    13. Appareil orthodontique selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément télescopique (54) est un tube intermédiaire et que l'ensemble télescopique comprend en outre une tige (56) disposée de façon télescopique à l'intérieur du tube intermédiaire (54) et du tube terminal (52), la tige télescopique (56) constituant l'extrémité mésiale (58) de l'ensemble télescopique.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description