Composition and a method for tissue augmentation

• US 5,633,001 A
• Filed: 09/19/1995
• Issued: 05/27/1997
• Est. Priority Date: 03/19/1993
• Status: Expired due to Term

• Current Assignee: Q-Med Aktiebolag (Nestle SA)
• Original Assignee: Medinvent Limited
• Inventors: .ANG.gerup, Bengt
• Primary Examiner(s): Azpuru, Carlos A.
• Application Number:
  US08/525,558
• Time in Patent Office: 616 Days
• Field of Search: 424/423, 514/772.3, 514/777
• US Class Current: 424/423
• CPC Class Codes: A61F 2/0059 Cosmetic or alloplastic implants A61F2/10 - A61F2/16, A61F2/28 take precedence
• CPC Class Codes: A61L 27/26 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 27/50 Materials characterised by their function or physical properties , e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
• CPC Class Codes: A61L 27/52 Hydrogels or hydrocolloids
• CPC Class Codes: A61L 27/54 Biologically active materials, e.g. therapeutic substances A61L27/227 takes precedence
• CPC Class Codes: A61L 31/041 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 31/14 Materials characterised by their function or physical properties , e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
• CPC Class Codes: A61L 31/145 Hydrogels or hydrocolloids
• CPC Class Codes: A61L 31/16 Biologically active materials, e.g. therapeutic substances A61L31/047 takes precedence

Abstract

The present invention provides a biocompatible composition for tissue augmentation, comprising a pseudoplastic polymer carrier in an amount of 0.05-50% (w/w) of the total composition; and one or more tissue augmenting substances(s). Furthermore, the invention comprises a method for tissue augmentation, comprising: injecting the above composition into a desired site of the human or animal body for augmenting the tissue at and around said site.

Claims

1. A biocompatible composition which provides for tissue augmentation, which comprises

(i) a pseudoplastic polymer carrier 0.05-50% (w/w) of the total composition;

and

(ii) a water insoluble, biocompatible and biodegradable tissue augmenting substance comprising a dextranomer.

2. A composition according to claim 1, wherein said pseudoplastic polymer carrier is selected from the group consisting of glucose amine glucans, hydroxy ethyl cellulose, carboxy methyl cellulose, xanthan gum, and alginates.

3. A composition according to claim 1, wherein said dextranomer is present in the form of microbeads.

4. A composition according to claim 1, wherein such tissue augmenting dextranomer is surface modified under conditions which result in a substance which stimulates or inhibits the growth of specific cell types.

5. A composition according to claim 1, which also comprises one or more therapeutically active ingredient(s).

6. A composition according to claim 5, wherein said active ingredient(s) is (are) in sustained release form.

10. A method for tissue augmentation comprising injecting a composition of a pseudoplastic carrier comprising a tissue augmenting material comprising dextranomer into a desired site on the human or animal body for augmenting the tissue at and around said site wherein the composition is as defined in claim 2.

11. A composition according to claim 2, wherein said dextranomer is present in the form of microbeads.

12. A composition according to claim 2, wherein said tissue augmenting dextranomer is surface modified under conditions which result in a substance which stimulates or inhibits the growth of specific cell types.

13. A composition according to claim 3, wherein said tissue augmenting dextranomer is surface modified under conditions which result in a substance which stimulates or inhibits the growth of specific cell types.

14. A composition according to claim 11, wherein said tissue augmenting dextranomer is surface modified under conditions which result in a substance which stimulates or inhibits the growth of specific cell types.

15. A composition according to claim 2, which also comprises one or more therapeutically active ingredients.

16. A composition according to claim 3, which also comprises one or more therapeutically active ingredients.

17. A composition according to claim 4, which also comprises one or more therapeutically active ingredients.

18. A composition according to claim 11, which also comprises one or more therapeutically active ingredients.

19. A composition according to claim 14, which also comprises one or more therapeutically active ingredients.

21. The composition of claim 2, wherein the glucose amine glucans comprise hyaluronic acid.

7. A method for tissue augmentation, comprising:

injecting a composition of a pseudoplastic carrier comprising a tissue augmenting material comprising dextranomer and optionally an active ingredient into a desired site on the human or animal body for augmenting the tissue at and around said site.

8. A method according to claim 7, comprising injecting said composition through a cannula or catheter under fiberoptic guidance.

9. A method according to claim 7, comprising repeating said injection after a certain time period in order to provide for further tissue augmentation.

20. A method according to claim 8, comprising repeating said injection after a certain time period in order to provide for further tissue augmentation.