Porous coated implants having improved fatigue behavior

Details Porous coated implants having improved fatigue behavior Porous coated implants having improved fatigue behavior

1993-07-26

1994-12-20

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

427422, 428613, 623 16, 623 23, B23P 1700

Patent

active

053736214

ABSTRACT:
Orthopaedic implants exhibiting improved fatigue strength are disclosed. By forming a plurality of nodules on the surface of an implant and depositing a porous coating onto the surface of these nodules, the fatigue strength of implants such as those made from .alpha.+.beta. titanium alloys, e.g., Ti-6Al-4V alloy is substantially improved. The present invention provides a novel geometry which substantially reduces the stress concentration factor created by the interfacial geometry of conventional porous coatings. Methods of manufacturing porous coated orthopaedic implants are also disclosed.

REFERENCES:
patent: 448745 (1891-03-01), Wright
patent: 3314420 (1967-04-01), Smith et al.
patent: 3605123 (1971-09-01), Hahn
patent: 4923513 (1990-05-01), Ducheyne et al.
patent: 5030233 (1991-07-01), Ducheyne
patent: 5258030 (1993-11-01), Wolfarth et al.
J. Biomed Mater Res. (USA), 1990, 24/5 pp. 591-604 by P. B. Messersmith et al.
D. Wolfarth, et al., "The effect of stress concentrations on fatigue properties of porous coated implants," Trans. 13th Ann. Northeast Bioengineering Conference, Philadelphia, Pa. (Mar. 1987) (Abstract only).
P. B. Messersmith, et al., "Stress enhancement and fatigue susceptibility of porous coated Ti-6A1-4V implants: an elastic analysis," J. Biomed. Mater. Res., 24:591-604 (1990).
D. Wolfarth, et al., "Parametric analysis of interfacial stress concentrations in porous coated implants," J. Applied Biomater., 1:3-12 (1990).
S. D. Cook, et al., "Fatigue properties of carbon-and porous-coated Ti-6Al-4V alloy," J. Biomed. Mater. Res., 18:497-512 (1984).
S. D. Cook, et al., "The effect of post-sintering heat treatments on the fatigue properties of porous coated Ti-6A1-4V Alloy," J. Biomed. Mater. Res., 22:287-302 (1988).
K. W. Greer, et al., "Fatigue properties of porous coated Ti-6A1-4V devices," pp. 228-231 in Proc. Fourth Southern Biomed. Eng. Conf., Pergamon Press, New York, 1985.
D. H. Kohn, et al., "A parametric study of the factors affecting the fatigue strength of porous coated Ti-6A1-4V implant alloy," J. Biomed. Mater. Res., 24:1483-1501 (1990).
S. Yue, et al., "The fatigue strength of porous-coated Ti-6A1-4V implant alloy," J. Biomed. Mater. Res., 18:1043-1058 (1984).

Affiliated with

Also associated with

Rating

Porous coated implants having improved fatigue behavior does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Porous coated implants having improved fatigue behavior, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Porous coated implants having improved fatigue behavior will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2380791