(19)
(11)EP 2 958 515 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
01.05.2019 Bulletin 2019/18

(21)Application number: 14754144.5

(22)Date of filing:  18.02.2014
(51)Int. Cl.: 
A61C 8/00  (2006.01)
A61C 13/263  (2006.01)
(86)International application number:
PCT/US2014/016862
(87)International publication number:
WO 2014/130438 (28.08.2014 Gazette  2014/35)

(54)

ENDOSSEOUS DENTAL IMPLANT AND ABUTMENT FOR PREVENTION OF BONE LOSS

ENOSSALES ZAHNIMPLANTAT UND ABUTMENT ZUR PRÄVENTION VON KNOCHENSCHWUND

IMPLANT ET PILIER DENTAIRE ENDO-OSSEUX POUR LA PRÉVENTION DE LA PERTE OSSEUSE


(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: 22.02.2013 US 201361767958 P

(43)Date of publication of application:
30.12.2015 Bulletin 2015/53

(73)Proprietor: Babiner, Boris, D.S.
Philadelphia, PA 19147 (US)

(72)Inventor:
  • Babiner, Boris, D.S.
    Philadelphia, PA 19147 (US)

(74)Representative: FRKelly 
27 Clyde Road
Dublin D04 F838
Dublin D04 F838 (IE)


(56)References cited: : 
WO-A1-2005/065571
WO-A1-2013/083125
US-A1- 2006 154 205
US-A1- 2007 037 123
US-A1- 2012 270 179
WO-A1-2012/143475
US-A1- 2002 102 518
US-A1- 2006 246 399
US-A1- 2008 299 516
  
      
    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

    Field of the Invention



    [0001] The present invention relates generally to endosseous dental implants and abutments, and more particularly, but not exclusively to, endosseous dental implants and abutments for deterring tissue loss, such as loss of buccal bone, at the site of the implant/abutment.

    Background of the Invention



    [0002] A dental implant is a device used to anchor, via an abutment, a dental prosthesis into living bone and tissue. The implant is placed into bone tissue to provide a solid foundation for the abutment and prosthesis attached to the abutment. Dental implants, abutments, and their prostheses serve numerous purposes, such as: chewing, where they oppose teeth or other prosthesis to allow mastication to take place; preventing extrusion of opposing teeth by providing sensory input and contact; and, providing an aesthetic appearance.

    [0003] In order to place an implant into the jawbone, the recipient site in the jawbone typically needs to be shaped with drills or other tools, such as expanders and piezoelectric tips, to prepare the site for implant placement. Dental implants may be placed immediately after extraction or after healing of the extraction site with or without a grafting material. Frequently, it may be difficult to achieve the required thickness of buccal bone with an implant of adequate width to provide sufficient support for the prosthesis. In such a case, a lack of sufficient buccal bone may result in the loss of supporting tissues (bone and gums) due to a reduced surface area of blood supply around the implant. Lack of sufficient buccal bone presents a dilemma for the clinician, because use of an narrower implant and abutment that may better fit within the buccal bone may experience failure during use due to overloading with bite forces whereas use of a wider implant (and accompanying abutment) may compromise aesthetics and result in potential tissue loss sequelae.

    [0004] Accordingly, it would be an advance in the art to provide dental implants and abutments that overcome the problems associated with potential bone and/or gum tissue loss sequelae, while providing sufficient prosthesis support and preserving aesthetics.

    [0005] WO 2012/143475 A1 discloses a dental implant having a longitudinally extending shaft with a longitudinal axis, a first longitudinally extending externally threaded region extending along the longitudinal axis and extending over only a circumferential portion of the external circumference of the shaft, a first longitudinally extending unthreaded region extending over only a circumferential portion of the external circumference of the shaft at a location longitudinally adjacent to the first longitudinally extending externally threaded region, an internal passage extending along the longitudinal axis of the shaft from the proximal abutment end of the shaft, the internal passage comprising first and second regions each extending over only a circumferential portion of the internal passage at opposing circumferential locations.

    [0006] Further examples of dental implants are known from WO 2005/065571 A1, US 2012/0270179 A1, and WO 2013/083125 A1.

    Summary of the Invention



    [0007] As an advance to the field of dental implants, an implant according to claim 1 and a dental implant system according to claim 11 comprising an implant according to claim 1 and an abutment are provided in accordance with the present invention which are structured to provide sufficient support for a dental prosthesis attached thereto, while at the same time allowing for sufficient bone tissue around the implant to prevent negative outcomes, such as bone tissue loss.

    [0008] In addition to the implant's first longitudinally extending externally threaded region, a second longitudinally extending externally threaded region may be provided extending along the longitudinal axis and extending over only a circumferential portion of the external circumference of the shaft, wherein the first and second longitudinally extending externally threaded regions may be disposed at opposing locations across the longitudinal axis about the external circumference of the shaft. The implant may also include a second longitudinally extending unthreaded region extending along the longitudinal axis and extending over only a circumferential portion of the external circumference of the shaft. The first and second longitudinally extending unthreaded regions may be disposed between the first and second longitudinally extending externally threaded regions at opposing locations across the longitudinal axis about the external circumference of the shaft. The first and second longitudinally extending externally threaded regions may be disposed a first distance apart as measured along a first diameter in a plane perpendicular to the longitudinal axis, and the first and second longitudinally extending unthreaded regions may be disposed a second distance apart as measured along a second diameter in the plane, wherein the second distance is less than the first distance. In an exemplary configuration, the first and second longitudinally extending unthreaded regions may include substantially flat planar regions. Selected surfaces, such as the first and second longitudinally extending unthreaded regions and/or threaded regions may be textured to promote bone growth therein.

    Brief Description of the Drawings



    [0009] The foregoing summary and the following detailed description of exemplary embodiments of the present invention may be further understood when read in conjunction with the appended drawings, in which:

    Figures 1A, 1B schematically illustrate side views of an exemplary dental implant in accordance with the present invention having two longitudinally extending threaded regions disposed at opposing locations across a longitudinal axis of the shaft and two longitudinally extending unthreaded regions disposed therebetween;

    Figure 1C schematically illustrates a top-view of the dental implant of Figs. 1A, 1B;

    Figures ID, IE schematically illustrate cross-sectional views of the dental implant of Figs. 1A, 1B showing the internal passageway for receiving a dental implant abutment;

    Figures 2A, 2B schematically illustrate top-views of the dental implant of Figs. 1A, 1B disposed in situ in a patient's jawbone at differing orientations;

    Figures 3A, 3B schematically illustrate side views of an exemplary dental implant abutment in accordance with the present invention having first and second frusto-conical regions disposed at opposing circumferential locations at a connection portion of the abutment and having two planar surfaces disposed between the first and second frusto-conical regions, respectively;

    Figures 4A, 4B schematically illustrate side views of an exemplary dental implant in accordance with the present invention having one longitudinally extending threaded region and one longitudinally extending unthreaded region adjacent thereto; and

    Figure 5 schematically illustrates a conic section formed by the intersection of a cone with a plane.


    Detailed Description of the Invention



    [0010] Referring now to the figures, wherein like elements are numbered alike throughout, Figures 1A-1E schematically illustrate in exemplary configuration of an endosseous dental implant 100 in accordance with the present invention which is structured to deter or prevent tissue loss in a patient at the site of implantation. In this regard, the endosseous dental implant 100 may have a diameter D1 in a first selected direction perpendicular to the longitudinal axis 109 of the implant 100 and a relatively smaller diameter D2 in a second direction orthogonal to the first selected direction. Such a configuration has the benefit of providing increased implant stability in view of the relatively larger diameter D1 and decreased chance of tissue loss in view of the relatively smaller diameter D2 by providing increased clearance between selected surfaces 103, 105 of the implant 100 and the buccal and lingual surfaces 11, 13 of the bone tissue 10 into which the implant 100 is inserted, for example, Fig. 2A. The presence of additional bone tissue between the implant 100 and the buccal and lingual surfaces 11, 13 can prevent or deter bone resorption and loss.

    [0011] Turning to the structure of the endosseous dental implant 100 more specifically, Figures 1A, 1B schematically illustrate side views taken from two orthogonal directions of an exemplary configuration of the endosseous dental implant 100 in accordance with the present invention having first and second longitudinally extending externally threaded regions 102, 104 and first and second longitudinally extending unthreaded regions 103, 105, which may comprise planar or other suitably shaped surfaces. The longitudinally extending externally threaded regions 102, 104 may extend over only a circumferential portion of the external circumference of the implant 100 and may be disposed at opposing locations across the longitudinal axis 109, Fig. 1A, 1C. Likewise, the longitudinally extending unthreaded regions 103, 105 may extend over only a circumferential portion of the external circumference of the implant 100 and may be disposed at opposing locations across the longitudinal axis 109, Figs. 1B, 1C. The longitudinally extending externally threaded and unthreaded regions 102, 104, 103, 105 may be longitudinally adjacent to one another, such that at a cross-section perpendicular to the longitudinal axis 109 there are two opposing threaded regions 102, 104 with two opposing unthreaded regions 103, 105 disposed therebetween, Figs. 1A-1C. Thus, a first diameter D1 may be defined as extending in a plane perpendicular to the longitudinal axis 109 between the first and second longitudinally extending threaded regions 102, 104. Similarly, a second diameter D2 may be defined as extending in the same perpendicular plane between the first and second longitudinally extending unthreaded regions 103, 105. The first diameter D1 may have a value of 4.3 mm, 4.8 mm, or 5.8 mm, and the second diameter D2 may have a diameter of 3.3 mm, for example. In addition, the endosseous dental implant 100 may be tapered from a proximal abutment end 108 to a distal end 106 in a plane containing the longitudinal axis 109 and intersecting the first and second longitudinally extending externally threaded regions 102, 104, Fig. 1A. Conversely, the longitudinally extending unthreaded regions 103, 105 may be parallel to one another to provide a non-tapered cross-section of the endosseous dental implant 100, Fig. 1B. The cross-section may take the form of a truncated circle, Fig. 1C; as used herein the term "truncated circle" refers to a circle having at least one chord which truncates the circle, such as the truncated circle illustrated in Fig. 1C having two opposing chords to provide a doubly truncated circular cross-section, for example. Independent of the particular shape of the implant 100, any of the longitudinally extending regions 102, 103, 104, 105 or other portions of the implant 100 for insertion into bone tissue may be roughened or textured to encourage bone growth therein. Any suitable process may be used to achieve the roughening or texture, such as a removal process, e.g., acid etching or particle blasting, or an additive process, e.g., deposition of hydroxyapatite, a protein, or growth factor, for example. In addition, the implant 100 itself may comprise any suitable material, such as titanium or a titanium alloy, for example.

    [0012] While the exemplary endosseous dental implant 100 of Figs. 1A-1E are shown with two threaded regions 102, 104 and two unthreaded regions 103, 105, other configurations are possible. For example, with reference to Figs. 4A, 4B, an endosseous dental implant 400 may include a single longitudinally extending externally threaded region 402 and a single longitudinally extending unthreaded region 403, each extending over only a circumferential portion of the external circumference.

    [0013] In one exemplary use, the implant 100 may be oriented in the jawbone 10 of a patient such that the longitudinally extending unthreaded regions 103, 105 are disposed generally parallel to the buccal and lingual surfaces 11, 13 of the jawbone 10 to provide additional space for the bone tissue between the longitudinally extending unthreaded regions 103, 105 and the buccal and lingual surfaces 11, 13, Fig. 2A. Such an orientation is expected to deter bone loss and promote implant support due to the presence of additional bone tissue between the buccal and/or lingual surfaces 11, 13 and the implant 100. In a further exemplary use, the implant 100 may be oriented in the jawbone 10 such that the longitudinally extending externally threaded regions 102, 104 are disposed proximate the buccal and lingual surfaces 11, 13, so that the longitudinally extending unthreaded regions 103, 105 are disposed proximate adjacent teeth 12, 14 to provide additional space between the implant 100 and the teeth 12, 14, Fig. 2B. This orientation may be desirable where the distance between the teeth 12, 14 is particularly narrow, and is expected to prevent bone loss as well as destabilization of the implant and damage to the roots of the adjacent teeth 12, 14. For example, such orientation may provide distance of 1.5 mm between the implant 100 and each tooth 12, 14 to allow dental papilla formation.

    [0014] The endosseous dental implant 100 further includes an internal passage 110 for receiving an abutment 200 to which a dental prosthesis may be attached, Figs. 1D, 1E, 3A, 3B. The internal passage 110 includes an internally threaded portion for receiving a screw 220 to attach the abutment 200 to the implant 100. In this regard, the abutment 200 may include a longitudinally extending passage therethrough for receiving the screw 220. The internal passage 110 may include first and second frusto-conical regions 112, 114 extending over only a circumferential portion of the internal passage 110 proximate the abutment end 108 of the implant 110, and may include first and second planar surfaces 116, 118 extending over only a circumferential portion of the internal passage 110 between the first and second frusto-conical regions 112, 114, respectively, Figs. ID, IE.

    [0015] A connection 210 may be provided at the connection end 206 of the abutment 200 and may be shaped to be indexed to the shape of the frusto-conical regions 112, 114 and planar surfaces 116, 118 of the internal passage 110 of the implant 100, Figs. 3A, 3B. For example, the connection 210 may include first and second frusto-conical regions 202, 204 extending over only a circumferential portion of the external circumference of the connection 210 and disposed at opposing circumferential locations to provide frusto-conical connection regions 202, 204 and non-frusto-conical connection regions 203, 205, which are indexed to the frusto-conical regions 112, 114 and planar surfaces 116, 118 of the implant 100, respectively. The planar surfaces 116, 118 are provided in the form bounded by a conic section, such as formed by a cone 501 intersected by a plane 502 parallel to the cone axis, Fig. 5, in which case the conic section boundary between planar and conic surfaces is a hyperbola 503. Thus, the boundary between the frusto-conical connection regions 202, 204 and non-frusto-conical connection regions 203, 205 are in the form of a hyperbola. The frusto-conical connection regions 202, 204 may have a shape similar to a Morse taper, and the non-frusto-conical connection regions 203, 205 may be provided in the form of planar surfaces that are parallel to a longitudinal axis of the abutment 200. However, the planar surfaces 116, 118 may be tilted relative to the longitudinal axis of the abutment 200. The frusto-conical connection regions 202, 204 may permit platform switching/shifting that enables interdental papilla preservation by moving a potential microgap between the implant 100 and abutment 200, allowing better blood supply at the bone and connective tissue interface, thus maximizing the aesthetic outcome.

    [0016] These and other advantages of the present invention will be apparent to those skilled in the art from the foregoing specification. Accordingly, it will be recognized by those skilled in the art that changes or modifications may be made to the above-described embodiments without departing from the broad inventive concepts of the invention. It should therefore be understood that this invention is not limited to the particular embodiments described herein, but is intended to include all changes and modifications that are within the scope of the invention as set forth in the claims.


    Claims

    1. An endosseous dental implant (100) for insertion into the jawbone of a patient and deterring bone loss at the site of the implant, comprising:

    a longitudinally extending shaft having a longitudinal axis extending from a proximal abutment end (108) to a distal end (106), and having an external circumference perpendicular to the longitudinal axis associated therewith;

    a first longitudinally extending externally threaded region (102) extending along the longitudinal axis and extending over only a circumferential portion of the external circumference of the shaft;

    a first longitudinally extending unthreaded region (103) extending over only a circumferential portion of the external circumference of the shaft at a location longitudinally adjacent to the first longitudinally extending externally threaded region; and

    an internal passage (110) extending along the longitudinal axis of the shaft from the proximal abutment end of the shaft, the internal passage comprising first and second frusto-conical regions (112, 114) each extending over only a circumferential portion of the internal passage proximate the abutment end of the shaft to provide frusto-conical regions at opposing circumferential locations of the internal passage, and a non-frusto-conical region disposed between the first and second frusto-conical regions, the non frusto-conical region includes a planar surface (116), wherein a boundary between the frusto-conical connection regions and the non-frusto-conical connection region is in the form of a hyperbola.


     
    2. The endosseous dental implant according to claim 1, wherein the internal passage comprises a truncated circular cross-sectional shape in a plane perpendicular to the longitudinal axis proximate the abutment end of the shaft.
     
    3. The endosseous dental implant according to claim 2 comprising first and second planar surfaces (116, 118) disposed between the first and second frusto-conical regions, respectively.
     
    4. The endosseous dental implant according to any one of the preceding claims, comprising a second longitudinally extending externally threaded region extending along the longitudinal axis and extending over only a circumferential portion of the external circumference of the shaft, the first and second longitudinally extending externally threaded regions disposed at opposing locations across the longitudinal axis about the external circumference of the shaft.
     
    5. The endosseous dental implant according to claim 4, comprising a second longitudinally extending unthreaded region extending along the longitudinal axis and extending over only a circumferential portion of the external circumference of the shaft, the first and second longitudinally extending unthreaded regions disposed between the first and second longitudinally extending externally threaded regions at opposing locations across the longitudinal axis about the external circumference of the shaft.
     
    6. The endosseous dental implant according to claim 5, wherein the first and second longitudinally extending externally threaded regions are disposed a first distance apart as measured along a first diameter in a plane perpendicular to the longitudinal axis, and wherein the first and second longitudinally extending unthreaded regions are disposed a second distance apart as measured along a second diameter in the plane, wherein the second distance is less than the first distance.
     
    7. The endosseous dental implant according to any one of claims 5 to 6, wherein the first and second longitudinally extending unthreaded regions comprise substantially flat planar regions.
     
    8. The endosseous dental implant according to any one of the preceding claims, wherein the shaft is tapered from a first end to a second end along the longitudinal axis in a plane containing the longitudinal axis and intersecting the first longitudinally extending externally threaded region.
     
    9. The endosseous dental implant according to any one of the preceding claims, wherein the shaft has a truncated circular cross-sectional shape in a plane perpendicular to the longitudinal axis.
     
    10. The endosseous dental implant according to any one of the preceding claims, wherein the first longitudinally extending externally threaded region is continuously threaded throughout the circumferential portion proximate the distal end.
     
    11. A dental implant system comprising the implant of claim 1 and an abutment (200) for insertion into the dental implant, the abutment comprising a longitudinally extending shaft having a longitudinal axis and an external circumference perpendicular to the axis associated therewith, and the abutment having a distal connection end (206) comprising a first frusto-conical region (202) thereat extending over only a circumferential portion of the external circumference of the connection end to provide a frusto-conical connection region and a non-frusto-conical connection region.
     
    12. The dental implant system according to claim 11, wherein the non-frusto-conical connection region comprises a planar surface parallel to the longitudinal axis.
     
    13. The dental implant system according to claim 11, wherein the non-frusto-conical connection region comprises a planar surface tilted relative to the longitudinal axis.
     
    14. The dental implant system according to any one of claims 11-13, the abutment comprising a second frusto-conical region (204) extending over only a circumferential portion of the external circumference of the connection end, the first and second frusto-conical regions disposed at opposing circumferential locations of the external circumference
     
    15. The dental implant system according to claim 14, wherein a boundary between the frusto-conical connection regions (202, 204) and the non-frusto-conical connection region is in the form of a hyperbola.
     
    16. The dental implant system according to claim 14, the abutment comprising first and second planar surfaces disposed between the first and second frusto-conical regions at opposing circumferential locations of the external circumference, respectively.
     
    17. The dental implant system according to any one of claims 11-16, wherein the shaft of the abutment has a truncated circular cross-sectional shape in a plane perpendicular to the longitudinal axis.
     


    Ansprüche

    1. Enossales Zahnimplantat (100) zum Einsetzen in den Kieferknochen eines Patienten und Verhindern von Knochenschwund an der Implantationsstelle, umfassend:

    einen in Längsrichtung verlaufenden Schaft, der eine Längsachse aufweist, die von einem proximalen Abutmentende (108) zu einem distalen Ende (106) verläuft,

    und einen Außenumfang aufweist, der senkrecht zu der damit verbundenen Längsachse verläuft;

    einen ersten in Längsrichtung verlaufenden Bereich mit Außengewinde (102), der entlang der Längsachse verläuft und sich nur über einen Umfangsabschnitt des Außenumfangs des Schafts erstreckt;

    einen ersten in Längsrichtung verlaufenden gewindelosen Bereich (103), der sich nur über einen Umfangsabschnitt des Außenumfangs des Schafts an einer Stelle, die in Längsrichtung an den ersten in Längsrichtung verlaufenden Bereich mit Außengewinde angrenzt, erstreckt; und

    einen inneren Kanal (110), der entlang der Längsachse des Schafts vom proximalen Abutmentende des Schafts aus verläuft, wobei der innere Kanal einen ersten und einen zweiten kegelstumpfförmigen Bereich (112, 114) umfasst, die sich jeweils nur über einen Umfangsabschnitt des inneren Kanals nahe dem Abutmentende des Schafts erstrecken, um kegelstumpfförmige Bereiche an gegenüberliegenden Umfangsstellen des inneren Kanals bereitzustellen, und einen nicht-kegelstumpfförmigen Bereich, der zwischen dem ersten und dem zweiten kegelstumpfförmigen Bereich angeordnet ist, wobei der nicht-kegelstumpfförmige Bereich eine plane Fläche (116) umfasst, wobei eine Grenze zwischen den kegelstumpfförmigen Verbindungsbereichen und den nicht-kegelstumpfförmigen Verbindungsbereichen die Form einer Hyperbel aufweist.


     
    2. Enossales Zahnimplantat nach Anspruch 1, wobei der innere Kanal eine abgeflachte kreisförmige Querschnittsform in einer Ebene senkrecht zur Längsachse nahe dem Abutmentende des Schafts aufweist.
     
    3. Enossales Zahnimplantat nach Anspruch 2, umfassend eine erste und eine zweite plane Fläche (116, 118), die zwischen dem ersten beziehungsweise dem zweiten kegelstumpfförmigen Bereich angeordnet sind.
     
    4. Enossales Zahnimplantat nach einem der vorstehenden Ansprüche, umfassend einen zweiten in Längsrichtung verlaufenden Bereich mit Außengewinde, der entlang der Längsachse verläuft und sich nur über einen Umfangsabschnitt des Außenumfangs des Schafts erstreckt, wobei der erste und der zweite in Längsrichtung verlaufende Bereich mit Außengewinde an gegenüberliegenden Stellen quer zur Längsachse um den Außenumfang des Schafts angeordnet sind.
     
    5. Enossales Zahnimplantat nach Anspruch 4, umfassend einen zweiten in Längsrichtung verlaufenden gewindelosen Bereich, der entlang der Längsachse verläuft und sich nur über einen Umfangsabschnitt des Außenumfangs des Schafts erstreckt, wobei der erste und der zweite in Längsrichtung verlaufende gewindelose Bereich zwischen dem ersten und dem zweiten in Längsrichtung verlaufenden Bereich mit Außengewinde an gegenüberliegenden Stellen quer zur Längsachse um den Außenumfang des Schafts angeordnet sind.
     
    6. Enossales Zahnimplantat nach Anspruch 5, wobei der erste und der zweite in Längsrichtung verlaufende Bereich mit Außengewinde um einen ersten Abstand getrennt nach Messung entlang einem ersten Durchmesser in einer Ebene senkrecht zur Längsachse angeordnet sind und wobei der erste und der zweite in Längsrichtung verlaufende gewindelose Bereich um einen zweiten Abstand getrennt nach Messung entlang einem zweiten Durchmesser in der Ebene angeordnet sind, wobei der zweite Abstand geringer als der erste Abstand ist.
     
    7. Enossales Zahnimplantat nach einem der Ansprüche 5 bis 6, wobei der erste und der zweite in Längsrichtung verlaufende gewindelose Bereich im Wesentlichen flache plane Bereiche umfassen.
     
    8. Enossales Zahnimplantat nach einem der vorstehenden Ansprüche, wobei der Schaft von einem ersten Ende zu einem zweiten Ende entlang der Längsrichtung in einer Ebene, die die Längsachse enthält und den ersten in Längsrichtung verlaufenden Bereich mit Außengewinde schneidet, konisch zuläuft.
     
    9. Enossales Zahnimplantat nach einem der vorstehenden Ansprüche, wobei der Schaft eine abgeflachte kreisförmige Querschnittsform in einer Ebene senkrecht zur Längsachse aufweist.
     
    10. Enossales Zahnimplantat nach einem der vorstehenden Ansprüche, wobei der erste in Längsrichtung verlaufende Bereich mit Außengewinde über den Umfangsabschnitt nahe dem distalen Ende durchgehend mit einem Gewinde versehen ist.
     
    11. Zahnimplantatsystem, umfassend das Implantat nach Anspruch 1 und ein Abutment (200) zum Einsetzen in das Zahnimplantat, wobei das Abutment einen in Längsrichtung verlaufenden Schaft umfasst, der eine Längsachse aufweist und einen Außenumfang aufweist, der senkrecht zu der damit verbundenen Längsachse verläuft, und wobei das Abutment ein distales Verbindungsende (206) aufweist, das einen ersten kegelstumpfförmigen Bereich (202) umfasst, der daselbst sich nur über einen Umfangsabschnitt des Außenumfangs des Verbindungsendes erstreckt, um einen kegelstumpfförmigen Verbindungsbereich und einen nicht-kegelstumpfförmigen Verbindungsbereich bereitzustellen.
     
    12. Zahnimplantatsystem nach Anspruch 11, wobei der nicht-kegelstumpfförmige Verbindungsbereich eine plane Fläche umfasst, die parallel zur Längsachse ist.
     
    13. Zahnimplantatsystem nach Anspruch 11, wobei der nicht-kegelstumpfförmige Verbindungsbereich eine plane Fläche umfasst, die relativ zur Längsachse geneigt ist.
     
    14. Zahnimplantatsystem nach einem der Ansprüche 11-13, wobei das Abutment einen zweiten kegelstumpfförmigen Bereich (204) umfasst, der sich nur über einen Umfangsabschnitt des Außenumfangs des Verbindungsendes erstreckt, wobei der erste und der zweite kegelstumpfförmige Bereich an gegenüberliegenden Umfangsstellen des Außenumfangs angeordnet sind.
     
    15. Zahnimplantatsystem nach Anspruch 14, wobei eine Grenze zwischen den kegelstumpfförmigen Verbindungsbereichen (202, 204) und dem nicht-kegelstumpfförmigen Verbindungsbereich die Form einer Hyperbel aufweist.
     
    16. Zahnimplantatsystem nach Anspruch 14, wobei das Abutment eine erste und eine zweite plane Fläche umfasst, die zwischen dem ersten beziehungsweise dem zweiten kegelstumpfförmigen Bereich an gegenüberliegenden Umfangsstellen des Außenumfangs angeordnet sind.
     
    17. Zahnimplantatsystem nach einem der Ansprüche 11-16, wobei der Schaft des Abutments eine abgeflachte kreisförmige Querschnittsform in einer Ebene senkrecht zur Längsachse aufweist.
     


    Revendications

    1. Implant dentaire endo-osseux (100) pour insertion dans la mâchoire d'un patient et prévention de la perte osseuse sur le site de l'implant, comprenant :

    un arbre s'étendant longitudinalement présentant un axe longitudinal s'étendant d'une extrémité de pilier proximale (108) à une extrémité distale (106), et présentant une circonférence externe perpendiculaire à l'axe longitudinal associé celle-ci ;

    une première région filetée extérieurement s'étendant longitudinalement (102) s'étendant le long de l'axe longitudinal et s'étendant sur uniquement une partie circonférentielle de la circonférence externe de l'arbre ;

    une première région non filetée s'étendant longitudinalement (103) s'étendant sur uniquement une partie circonférentielle de la circonférence externe de l'arbre dans un emplacement longitudinalement adjacent à la première région filetée extérieurement s'étendant longitudinalement ; et

    un passage interne (110) s'étendant le long de l'axe longitudinal de l'arbre de l'extrémité de pilier proximale de l'arbre, le passage interne comprenant des première et seconde régions frusto-coniques (112, 114) s'étendant chacune sur uniquement une partie circonférentielle du passage interne à proximité de l'extrémité de pilier de l'arbre pour fournir des régions frusto-coniques à des emplacements circonférentiels opposés du passage interne, et une région non frusto-conique disposée entre les première et seconde régions frusto-coniques, la région non frusto-conique comprend une surface plane (116), dans lequel une limite entre les régions de connexion frusto-coniques et la région de connexion non frusto-conique a la forme d'une hyperbole.


     
    2. Implant dentaire endo-osseux selon la revendication 1, dans lequel le passage interne comprend une forme en coupe transversale circulaire tronquée dans un plan perpendiculaire à l'axe longitudinal à proximité de l'extrémité de pilier de l'arbre.
     
    3. Implant dentaire endo-osseux selon la revendication 2, comprenant des première et seconde surfaces planes (116, 118) disposées entre les première et seconde régions frusto-coniques, respectivement.
     
    4. Implant dentaire endo-osseux selon l'une quelconque des revendications précédentes, comprenant une seconde région filetée extérieurement s'étendant longitudinalement s'étendant le long de l'axe longitudinal et s'étendant sur uniquement une partie circonférentielle de la circonférence externe de l'arbre, les première et seconde régions filetées extérieurement s'étendant longitudinalement étant disposées dans des emplacements opposés à travers l'axe longitudinal autour de la circonférence externe de l'arbre.
     
    5. Implant dentaire endo-osseux selon la revendication 4, comprenant une seconde région non filetée s'étendant longitudinalement s'étendant le long de l'axe longitudinal et s'étendant sur uniquement une partie circonférentielle de la circonférence externe de l'arbre, les première et seconde régions non filetées s'étendant longitudinalement étant disposées entre les première et seconde régions filetées extérieurement s'étendant longitudinalement dans des emplacements opposés à travers l'axe longitudinal autour de la circonférence externe de l'arbre.
     
    6. Implant dentaire endo-osseux selon la revendication 5, dans lequel les première et seconde régions filetées extérieurement s'étendant longitudinalement sont disposées à une première distance éloignée telle que mesurée le long d'un premier diamètre dans un plan perpendiculaire à l'axe longitudinal, et dans lequel les première et seconde régions non filetées s'étendant longitudinalement sont disposées à une seconde distance éloignée telle que mesurée le long d'un second diamètre dans le plan, dans lequel la seconde distance est inférieure à la première distance.
     
    7. Implant dentaire endo-osseux selon l'une quelconque des revendications 5 et 6, dans lequel les première et seconde régions non filetées s'étendant longitudinalement comprennent des régions planes sensiblement plates.
     
    8. Implant dentaire endo-osseux selon l'une quelconque des revendications précédentes, dans lequel l'arbre est effilé d'une première extrémité à une seconde extrémité le long de l'axe longitudinal dans un plan contenant l'axe longitudinal et croisant la première région filetée extérieurement s'étendant longitudinalement.
     
    9. Implant dentaire endo-osseux selon l'une quelconque des revendications précédentes, dans lequel l'arbre possède une forme en coupe transversale circulaire tronquée dans un plan perpendiculaire à l'axe longitudinal.
     
    10. Implant dentaire endo-osseux selon l'une quelconque des revendications précédentes, dans lequel la première région filetée extérieurement s'étendant longitudinalement est filetée en continu dans toute la partie circonférentielle à proximité de l'extrémité distale.
     
    11. Système d'implant dentaire comprenant l'implant selon la revendication 1 et un pilier (200) pour insertion dans l'implant dentaire, le pilier comprenant un arbre s'étendant longitudinalement présentant un axe longitudinal et une circonférence externe perpendiculaire à l'axe associé à celle-ci, et le pilier présentant une extrémité de connexion distale (206) comprenant une première région frusto-conique (202) au niveau de celle-ci s'étendant sur uniquement une partie circonférentielle de la circonférence externe de l'extrémité de connexion pour fournir une région de connexion frusto-conique et une région de connexion non frusto-conique.
     
    12. Système d'implant dentaire selon la revendication 11, dans lequel la région de connexion non frusto-conique comprend une surface plane parallèle à l'axe longitudinal.
     
    13. Système d'implant dentaire selon la revendication 11, dans lequel la région de connexion non frusto-conique comprend une surface plane inclinée par rapport à l'axe longitudinal.
     
    14. Système d'implant dentaire selon l'une quelconque des revendications 11 à 13, le pilier comprenant une seconde région frusto-conique (204) s'étendant sur uniquement une partie circonférentielle de la circonférence externe de l'extrémité de connexion, les première et seconde régions frusto-coniques étant disposées dans des emplacements circonférentiels opposés de la circonférence externe.
     
    15. Système d'implant dentaire selon la revendication 14, dans lequel une limite entre les régions de connexion frusto-coniques (202, 204) et la région de connexion non frusto-conique a la forme d'une hyperbole.
     
    16. Système d'implant dentaire selon la revendication 14, le pilier comprenant des première et seconde surfaces planes disposées entre les première et seconde régions frusto-coniques dans des emplacements circonférentiels opposés de la circonférence externe, respectivement.
     
    17. Système d'implant dentaire selon l'une quelconque des revendications 11 à 16, dans lequel l'arbre du pilier possède une forme en coupe transversale circulaire tronquée dans un plan perpendiculaire à l'axe longitudinal.
     




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    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description