EP0176711A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Implant with resorbable stem
Assignee: Kampner Stanley L
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Filing: 1985-08-09
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Granted: —
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Expires: 2005-08-09
Abstract
Abstract This invention relates to a biodegradable anchor for a permanent implant of a bone joint, e.g. hip, shoulder, knee or finger. The biodegradable anchor (14, 32) is an elongated member which has an exterior surface which tightly engages a cavity in the bone and is substantially immovable within the cavity upon implant. A non-resorbable means (42, 98) of securing the anchor to the permanent implant is also included.
Inventors
- 👤 Stanley L. Kampner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/148; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/32; A61F2/36; A61F2/3601; A61F2/3603; A61F2/38; A61F2/40; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B2017/00004; A61F2/3662; A61F2/367; A61F2/3672; A61F2/3676; A61F2/3859; A61F2/389; A61F2/4081; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30032; A61F2002/3006; A61F2002/30062; A61F2002/30316; A61F2002/30329; A61F2002/30405; A61F2/30771; A61F2002/30878; A61F2002/30886; A61F2/34; A61F2002/3401; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2002/365; A61F2/4014; A61F2002/4018; A61F2002/4088; A61F2210/00; A61F2210/0004; A61F2220/00; A61F2220/0025; A61F2250/00; A61F2250/0014; A61F2250/003; A61F2250/0031; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00029; A61F2310/00389; A61F2310/00574; A61F2310/00592; A61F2310/00796; A61F2310/00952; A61L2430/00; A61L2430/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
56 words
An anchor for a permanent implant for a bone joint comprising an elongated member constructed of a biodegradable material having an exterior surface shaped to tightly engage a cavity defined by the bone and to be substantially immovably disposed within the cavity after being placed therein, and means for securing the member to the permanent implant.
Claim 2
Dependent Claim
56 words
An anchor for a permanent implant for a bone joint comprising an elongated member constructed of a biodegradable material having an exterior surface shaped to tightly engage a cavity defined by the bone and to be substantially immovably disposed within the cavity after being placed therein, and means for securing the member to the permanent implant.
Claim 3
Dependent Claim
17 words
An anchor according to claim 1 wherein the securing means comprises a threaded hole in the member.
Claim 4
Dependent Claim
14 words
An anchor according to claim 1 wherein the exterior surface defines a male thread.
Claim 5
Dependent Claim
13 words
An anchor according to claim 1 wherein the exterior surface is substantially smooth.
Claim 6
Dependent Claim
23 words
An anchor according to claim 1 wherein the exterior surface is shaped to tightly fit into a canal defined by a natural bone.
Claim 7
Dependent Claim
24 words
An anchor according to claim 2 wherein the threaded hole is engageable with an externally threaded screw engaging a surface of the permanent implant.
Claim 8
Dependent Claim
40 words
An anchor according to claim 1 wherein the biodegradable material is selected from the group consisting of polyesters of glycolic acid, polyesters of lactic acid, polyamides of a-amino acids, unmodified polymers, modified polymers, calcium hydroxyapatite, tricalcium phosphate or polylactic acid.
Claim 9
Dependent Claim
20 words
An anchor according to claim 1 wherein the permanent bone implant is selected from an alloy of cobalt-chromium or titanium.
Claim 10
Dependent Claim
15 words
An anchor according to claim 1 wherein the implant is part of a prosthetic hip.
Claim 11
Dependent Claim
15 words
An anchor according to claim 1 wherein the implant is part of a prosthetic knee.
Claim 12
Dependent Claim
15 words
An anchor according to claim 1 wherein the implant is part of a prosthetic shoulder.
Claim 13
Dependent Claim
29 words
An anchor according to claim 1 wherein the elongated member is a threaded bolt and the securing means include a screw engaging the permanent implant threading into the bolt.
Claim 14
Dependent Claim
48 words
An anchor according to claim 1 wherein the elongated member is a stem having an exterior surface that is substantially smooth and wherein the securing means comprises a threaded hole in the stem and a screw engaging the permanent implant for threading into the hole in the stem.
Claim 15
Dependent Claim
127 words
A procedure for the implantation of a prosthetic bone device comprising the steps of: a. providing a functional implant component adapted to remain in permanent contact with the bone; b. opening a cavity in the bone; c. placing the functional component against the bone; d. inserting an anchor into the cavity so that the anchor is substantially immovably disposed within the cavity; e. fixedly securing the component to the anchor so that the component is in contact with bone surrounding the cavity; f. promoting bone proximate the cavity to attach directly to the component to thereby permanently fix the component to the bone; and g. permitting the anchor to resorb after the completion of the promoting step so that natural tissue can grow back into the cavity.
Claim 16
Dependent Claim
127 words
A procedure for the implantation of a prosthetic bone device comprising the steps of: a. providing a functional implant component adapted to remain in permanent contact with the bone; b. opening a cavity in the bone; c. placing the functional component against the bone; d. inserting an anchor into the cavity so that the anchor is substantially immovably disposed within the cavity; e. fixedly securing the component to the anchor so that the component is in contact with bone surrounding the cavity; f. promoting bone proximate the cavity to attach directly to the component to thereby permanently fix the component to the bone; and g. permitting the anchor to resorb after the completion of the promoting step so that natural tissue can grow back into the cavity.
References Cited (Backward Citations)
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