(19)

(11)

EP 0 813 426 A1

(12)

(43) Date of publication: 29.12.1997 Bulletin 1997/52 (21) Application number: 96907184.0 (22) Date of filing: 05.03.1996

(51) International Patent Classification (IPC):  A61B 19/ 00( . ) A61L 2/ 26( . ) A61C 19/ 00( . ) (86) International application number: PCT/US1996/003019 (87) International publication number: WO 1996/028194 (19.09.1996 Gazette 1996/42)

(84) Designated Contracting States: CH DE FR IT LI NL SE (30) Priority: 10.03.1995 GB 19950004830 (71) Applicant: Dentsply Research and Development Corporation Milford, Delaware 19963 (US)	(72) Inventor: DAVIES, Simon, Maitland Shepperton, Middlesex TW17 8NQ (GB) (74) Representative: Wächtershäuser, Günter, Prof. Dr.  Patentanwalt, Tal 29 80331 München 80331 München (DE)