Claims
- 1. A process for the preparation of a sintered bioengineering thermoplastic material wherein both porosity and mechanical strength are optimized, said process comprising the steps of:
- (a) forming a mixture of at least one sinterable bioengineering thermoplastic material selected from the group consisting of polysulfones, polyphenylenesulfides, polyacetals, thermoplastic polyesters, polycarbonates, aromatic polyamides, aromatic polyamideimides, thermoplastic polyimides, polyaryletherketones, polyarylethernitriles and aromatic polyhydroxyethers, in particular form, said mixture having at least one fraction of a biomodal distribution of average particle diameters of from about 7:1 to about 5:1,
- (b) heating said mixture at a temperature and time sufficient to sinter the components of said mixture to produce a porous product which does not rely on another component for its structural integrity said porous product having:
- (a) an average pore diameter of about 90 to about 600 microns;
- (b) pore interconnection having average diameters fo greater than about 50 microns; and
- (c) a porosity f greater than about 25 percent,
- and
- (c) recovering using said product as a prosthesis.
- 2. The process of claim 1 wherein said mixture contains a sintering additive in an amount sufficient to lower said temperature and/or shorten said time necessary to prepare said sintered material.
Parent Case Info
This application is a continuation of prior U.S. application Ser. No. 614,374, filed May 24, 1984, abandoned, which is a continuation of application Ser. No. 417,586, filed Sept. 13, 1982, abandoned, which is a divisional of application Ser. No. 113,317, filed Jan. 18, 1980, now U.S. Pat. No. 4,362,681, which is a continuation-in-part of application Ser. No. 000,377, filed Dec. 29, 1978, abandoned, which is a divisional of application Ser. No. 787,531, filed Apr. 14, 1977, now U.S. Pat. No. 4,164,794.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
929314 |
Jul 1973 |
CAX |
Non-Patent Literature Citations (3)
Entry |
B. W. Sauer, The Role of Porous Polymeric Materials in Prosthesis Attachment, Clemson University, Biomaterials Symposium, Apr. 14-18, 1973. |
M. Spector et al., Bone Growth into Porous High-Density Polyethylene, J. Biomed. Mater. Res. Symposium, No. 7, pp. 595-603 (1976). |
Williams & Roaf, Implants in Surgery, W. B. Saunders Co., Ltd., Jul. 3, 1973, pp. 89-93. |
Divisions (2)
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Number |
Date |
Country |
Parent |
113317 |
Jan 1980 |
|
Parent |
787531 |
Apr 1977 |
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Continuations (2)
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Number |
Date |
Country |
Parent |
614374 |
May 1984 |
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Parent |
417586 |
Sep 1982 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
377 |
Dec 1978 |
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