Abstract Bone resorption from and invagination of epithelial tissue around periodontally involved teeth can be arrested and reversed by coating the affected areas of the tooth roots with a nontoxic, biocompatible composition which acts as a shield against bacterial toxins and which is capable of supporting biological attachment of cells in the gingiva. This treatment allows the periodontally involved region to heal by providing improved physiological and mechanical support of the tooth by its bone socket. In a preferred embodiment of the invention, the treatment involves coating the root surfaces of periodontally involved teeth with a film consisting of a polycarbonate resin in methylene chloride solvent. This invention also provides a process for stopping and reversing resorption of bone from, and invagination of epithelial tissue around, screws, pins, blades, and other metal inserts which have been placed in bones, particularly dental implants placed in alveolar bone. The process involves coating the osseous or subgingival segment of the insert with a nontoxic, bioacceptable composition which is capable of supporting biological attachment of fibroblastic or epithelial cells. The preferred coating is a polycarbonate resin.
Inventors
👤 Lawrence E. Widman
👤 Nasser G. Habeeb
👤 Raymond Z. Darakjian
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-02 06:33
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
A method for treating the resorption of bone from around the root surfaces of periodontally involved natural teeth which comprises coating said surfaces with a nontoxic, biocompatible composition containing a polycarbonate resin dissolved in a nontoxic organic solvent and which is capable of supporting biological attachment of gingival cells and is impermeable to bacterial toxins.
Claim 2
Independent Claim
55 words
A method for treating the resorption of bone from around the root surfaces of periodontally involved natural teeth which comprises coating said surfaces with a nontoxic, biocompatible composition containing a polycarbonate resin dissolved in a nontoxic organic solvent and which is capable of supporting biological attachment of gingival cells and is impermeable to bacterial toxins.
Claim 3
Dependent Claim
28 words
A method in accordance with claim 1 wherein said polycarbonate resin has a relative viscosity from about 1.20 to 1.40 in 0.5 percent methylene chloride at 20° C.
Claim 4
Dependent Claim
40 words
A method in accordance with claim 1 wherein said polycarbonate resin is applied to said surface as a film containing polycarbonate and solvent in which the concentration of polycarbonate is in the range 0.5 percent to 95 percent by weight.
Claim 5
Dependent Claim
13 words
A method in accordance with claim 3 wherein said solvent is methylene chloride.
Claim 6
Dependent Claim
13 words
A coated tooth root prepared in accordance with the method of claim 1.