US5258028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textured micro implants
Assignee: BEISANG AUTHUR A III
•
Filing: 1991-06-12
•
Granted: 1993-11-02
•
Expires: 2011-06-12
Abstract
Abstract An improved micro-implantation method and composition for filling depressed scars, unsymmetrical orbital floors, muscle, lip, and other soft tissue defects is provided for use in reconstructive surgery procedures. Textured micro particles having an outside diameter between about 30 microns and 3000 microns are used with an appropriate physiologic vehicle cannula and syringe and/or pressure delivery system into a predetermined locus. The particles provide long-term filling of defects without migration loss.
Inventors
- 👤 Robert A. Ersek
- 👤 Arthur A. Beisang
- 👤 Arthur A. Beisang, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/0059; A61L; A61L27/00; A61L27/02; A61L27/04; A61L27/10; A61L27/14; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30303; A61F2230/00; A61F2230/0063; Y; Y10; Y10S; Y10S623/00; Y10S623/924
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
An injectable micro-implantation system for long-term augmentation of soft tissue, comprising in combination: biologically compatible micro particles of a relatively resilient, malleable material dispersed in a non-retentive compatible physiological vehicle, the micro particles being further characterized by a rough surface texture having a plurality of surface irregularities forming openings generally at random therein; the textured micro particles having an average particle size generally between 30 and 3000 microns with a dimension of the openings formed by the irregularities within the particles being generally in a range between 10 angstroms and 500 microns; wherein relative average particle size and average roughness of texture are sufficient in combination to, in an autogenous manner, substantially preclude migration of the particles from an augmentation site, the particles being incorporated in a final implant; and wherein the relatively malleable material is poly(dimethylsiloxane) and the physiological vehicle is a hydrogel of polyvinyl pyrrolidone.
Claim 2
Dependent Claim
147 words
An injectable micro-implantation system for long-term augmentation of soft tissue, comprising in combination: biologically compatible micro particles of a relatively resilient, malleable material dispersed in a non-retentive compatible physiological vehicle, the micro particles being further characterized by a rough surface texture having a plurality of surface irregularities forming openings generally at random therein; the textured micro particles having an average particle size generally between 30 and 3000 microns with a dimension of the openings formed by the irregularities within the particles being generally in a range between 10 angstroms and 500 microns; wherein relative average particle size and average roughness of texture are sufficient in combination to, in an autogenous manner, substantially preclude migration of the particles from an augmentation site, the particles being incorporated in a final implant; and wherein the relatively malleable material is poly(dimethylsiloxane) and the physiological vehicle is a hydrogel of polyvinyl pyrrolidone.
Claim 3
Dependent Claim
19 words
The injectable micro-implantation system of claim 1 wherein the biologically inert micro particles are of a generally uniform configuration.
Claim 4
Dependent Claim
20 words
The injectable micro-implantation system of claim 1 wherein a range of average particle size is between 60 and 600 microns.
Claim 5
Dependent Claim
29 words
The injectable micro-implantation system of claim 3 wherein the openings formed by the irregularities within the particles are of an average size between about 10 and about 200 microns.
Claim 6
Dependent Claim
16 words
The injectable micro-implantation system of claim 4 wherein the micro particles are generally spherical in shape.
Claim 7
Dependent Claim
44 words
The injectable micro-implantation system of claim 1 wherein: a range of average particle size is between 100 microns and 600 microns; and wherein the openings formed by the irregularities within the particles are of an average size between about 10 and about 200 microns.
Claim 8
Dependent Claim
16 words
The injectable micro-implantation system of claim 6 wherein the micro particles are generally spherical in shape.
Claim 9
Dependent Claim
17 words
The injectable micro-implantation system of claim 1 wherein the average particle size is at least 80 microns.
Claim 10
Dependent Claim
29 words
The injectable micro-implantation system of claim 8 wherein the openings formed by the irregularities within the particles are of an average size between about 10 and about 200 microns.
References Cited (Backward Citations)
US4678470A
Cited
US4863472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-01 | 2001-05-03 | 2001-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-01 | 2005-05-03 | 2005-11-02 | $7700.00 | Window Closed / Lapsed |