Prosthetic implants coated with hydroxylapatite and process for

Details Prosthetic implants coated with hydroxylapatite and process for Prosthetic implants coated with hydroxylapatite and process for

1997-03-07

1998-03-24

Wilson, John J.

Dentistry

Prosthodontics

Dental implant construction

433173, 427 227, A61C 800

Patent

active

057305986

ABSTRACT:
An implant and a process for treating the same wherein the implant has a highly pure coating of crystalline hydroxylapatite (HA). The implant is initially coated with HA using a plasma spraying technique and is then subjected to a two stage process, including a hydrothermal treatment stage and a leaching stage. The resulting implant is highly crystalline, containing only a small percentage of amorphous calcium phosphate and essentially being free of calcium hydroxide, calcium oxide, and calcium carbonate.

REFERENCES:
patent: 4146936 (1979-04-01), Aoyagi et al.
patent: 4223412 (1980-09-01), Aoyagi et al.
patent: 4366183 (1982-12-01), Ghommidh et al.
patent: 4687675 (1987-08-01), Nakano et al.
patent: 4693986 (1987-09-01), Vit et al.
patent: 4702930 (1987-10-01), Heide et al.
patent: 4746532 (1988-05-01), Suzuki et al.
patent: 4839215 (1989-06-01), Starling et al.
patent: 4861733 (1989-08-01), White
patent: 4871578 (1989-10-01), Adam et al.
patent: 4882196 (1989-11-01), Shimamune et al.
patent: 4911953 (1990-03-01), Hosonuma et al.
patent: 4919751 (1990-04-01), Sumita et al.
patent: 4938938 (1990-07-01), Ewers et al.
patent: 4960646 (1990-10-01), Shimamune et al.
patent: 4963145 (1990-10-01), Takagi et al.
patent: 5032552 (1991-07-01), Nonami et al.
patent: 5034352 (1991-07-01), Vit et al.
patent: 5039546 (1991-08-01), Chung et al.
patent: 5108399 (1992-04-01), Eitenmuller et al.
patent: 5141576 (1992-08-01), Shimamune et al.
patent: 5180564 (1993-01-01), Wahl et al.
patent: 5242706 (1993-09-01), Cotell et al.
patent: 5306305 (1994-04-01), Lee
patent: 5310464 (1994-05-01), Redepenning
patent: 5405436 (1995-04-01), Maurer et al.
patent: 5427754 (1995-06-01), Nagata et al.
patent: 5441536 (1995-08-01), Aoki et al.
patent: 5472734 (1995-12-01), Perrotta et al.
patent: 5478237 (1995-12-01), Ishizawa
patent: 5496399 (1996-03-01), Ison et al.
patent: 5543019 (1996-08-01), Lee et al.
K. de Groot, Plasma Sprayed Coatings Hydroxylapatite, 1987, Journal of Biomedical Materials Research, vol. 21, 1375-1381.
H.W. Denissen et al, Fluorapatite And Hydroxyapatite Heat-Treated Coatings For Dental Implants.
K. de Groot, et al; Plasma-Sprayed Coatings of Calcium Phosphate; CRC Handbook of Bioactive Ceramics, vol. II, pp. 133-142.
Higashikata, Masaaki et al; Characterization of Hydroxyapatite Coating Obtained by Hydrothermal Transformation of Plasma-Sprayed .alpha.-Tricalcium Phosphate; Proceedings of the First International Symposium of Apatite, Mishima, Japan, Jul. 1991.
S.R. Radin, P. Ducheyne; Plasma spraying induced changes of calcium phosphate ceramic characteristics and the effect on in vitro stability; Journal of Materials Science: Materials in Medicine 3 (1992) 33-42.
Z. Zyman; Amorphous phase and morphological structure of hydroxyapatite plasma coatings; Biomaterials 1993 vol. 14. No. 3.
Z. Zyman et al; Periodic crystallization effect in the surface layers of coatings during plasma spraying of hydroxyapatite; Biomaterials 1993, vol. 14, No. 15.
Masahiro Yoshimura et al; Hydrothermal Processing of Hydroxyapatite: Past, Present, and Future; 1994 by CRC Press, Inc.
Jie Weng, et al; Intrinsic factors of apatite influencing its amorphization during plasma-spray coating; Biomaterials 1995, vol. 16 No. 1.
Yang Cao et al; Water vapour-treated hydroxyapatite coatings after plasma spraying and their characteristics; Biomaterials 1996, vol. 17.
Harini Dasarathy et al; Analysis of apatite deposits on substrates; Journal of Biomedical Materials Research, vol. 27, 477-82 (1993).
J.G.C. Wolke et al; Bioceramics For Maxillofacial Applications.
Jie Weng et al; Thermal decomposition of hydroxyapatite structure induced by titanium and its dioxide; 1994 Chapman & Hall.
R.M. Pilliar et al; Mechanical Characteristics of Plasma-Sprayed Hydroxyapatite-Titanium Alloy Interfaces; Bioceramics vol. 4 (Proceedings of the 4th International Symposium on Ceramics in Medicine, London, UK, Sep. 1991).
Takeo Hattori et al; Hydrothermal Synthesis of Hydroxyapatite from Calcium (1988).
D.M. Roy et al; Hydrothermal Synthesis of Various Carbonate Containing Calcium Hydroxyapatites; Mat.Res. Bull, vol. 9 pp. 35-40 ('74).
Jiyong Chen et al; Effect of atmosphere on phase transformation in plasma-sprayed hydroxyapatite coatings during heat treatment; Journal of Biomedical Materials Research, vol. 34, 15-20 (1997).

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