US5106304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restoration composition and method
Assignee: Individual
•
Filing: 1990-10-09
•
Granted: 1992-04-21
•
Expires: 2010-10-09
Abstract
Abstract A dental filling and sealing composition and method for human tooth restoration. The method includes pulverizing bovine teeth into small particles and separating the particles containing only enamel from the remaining particles and mixing with an adhesive such as gloss ionomer cement, methyacrylate or the like. For restoration using a glass ionomer cement, the enamel particles are mixed directly with the cement and applied to a human tooth by techniques commonly known in the dental profession. For restoration using an acrylic adhesive, the enamel particles are subjected to an acid-etch treatment followed by forming a mixture comprising the enamel particles and the acrylic adhesive, which is applied by commonly known techniques.
Inventors
- 👤 Stephen H. Chronister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:09
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
A method for preparing enamel for restoring a human tooth, comprising the steps of: (a) obtaining bovine teeth; (b) sterilizing and coagulating proteins in said bovine teeth by boiling in water sufficiently to kill living organisms in said bovine teeth; (c) desiccating said bovine teeth at an elevated ambient temperature; (d) crushing said bovine teeth into coarse particles; (e) hydrolyzing organic bonding between enamel and dentin of said coarse particles by boiling in concentrated sodium hydroxide; (f) cooling and rinsing said coarse particles with water; (g) neutralizing the pH of said coarse particles; (h) desiccating said coarse particles; (i) further crushing said coarse particles into fine particles having dimensions of less than about 200 microns such that a first portion of said fine particles comprises substantially enamel material and a second portion of said fine particles comprises substantially dentin material; (j) cleaning and desiccating said fine particles; (k) separating said first portion from said second portion by placing said fine particles in a solution having a density intermediate said first and second portions; (l) pouring off said solution with said second portion suspended therein; (m) washing said first portion with water; and (n) drying said first portion.
Claim 2
Independent Claim
197 words
A method for preparing enamel for restoring a human tooth, comprising the steps of: (a) obtaining bovine teeth; (b) sterilizing and coagulating proteins in said bovine teeth by boiling in water sufficiently to kill living organisms in said bovine teeth; (c) desiccating said bovine teeth at an elevated ambient temperature; (d) crushing said bovine teeth into coarse particles; (e) hydrolyzing organic bonding between enamel and dentin of said coarse particles by boiling in concentrated sodium hydroxide; (f) cooling and rinsing said coarse particles with water; (g) neutralizing the pH of said coarse particles; (h) desiccating said coarse particles; (i) further crushing said coarse particles into fine particles having dimensions of less than about 200 microns such that a first portion of said fine particles comprises substantially enamel material and a second portion of said fine particles comprises substantially dentin material; (j) cleaning and desiccating said fine particles; (k) separating said first portion from said second portion by placing said fine particles in a solution having a density intermediate said first and second portions; (l) pouring off said solution with said second portion suspended therein; (m) washing said first portion with water; and (n) drying said first portion.
Claim 3
Dependent Claim
46 words
The method according to claim 1 including the subsequent steps of: (a) forming a mixture comprising said first portion having a selected range of particle sizes and adhesive means; and (b) restoring a tooth by applying said mixture to a tooth structure prepared for such restoration.
Claim 4
Dependent Claim
86 words
The method of claim 2 wherein step (a) includes: (a) preparing a mixture of glass ionomer powder and said first portion having enamel particles ranging in size from 1 to 100 microns such that said glass ionomer powder comprises approximately 85% of said mixture and said first portion comprises the remainder of said mixture; and (b) preparing material for a restorative by mixing said mixture with a carboxylic acid solution in an approximate ratio of 4.5 grams of said mixture to 1 gram of said solution.
Claim 5
Dependent Claim
85 words
The method according to claim 1, including the subsequent steps of: (a) submerging said first portion into a phosphoric acid solution; (b) rinsing said first portion with water; (c) submerging said first portion in a sodium fluoride solution; (d) rinsing said first portion with water; (e) desiccating said first portion; (f) forming a mixture comprising said first portion having a selected range of particle sizes and adhesive means; and (g) restoring a tooth by applying said mixture to a tooth structure prepared for such restoration.
Claim 6
Dependent Claim
12 words
The method of claim 4 wherein: (a) said adhesive means is methyacrylate.
Claim 7
Independent Claim
98 words
A method for preparing enamel for restoring a human tooth, comprising the steps of: (a) submerging bovine teeth in boiling water; (b) crushing said bovine teeth into coarse particles; (c) hydrolyzing organic bonding between enamel and dentin of said coarse particles by boiling in concentrated sodium hydroxide; (d) neutralizing the pH of said coarse particles; (e) crushing said coarse particles into fine particles such that a first portion of said fine particles comprises substantially enamel material and a second portion of said fine particles comprises substantially dentin material; and (f) separating said first portion from said second portion.
Claim 8
Independent Claim
98 words
A method for preparing enamel for restoring a human tooth, comprising the steps of: (a) submerging bovine teeth in boiling water; (b) crushing said bovine teeth into coarse particles; (c) hydrolyzing organic bonding between enamel and dentin of said coarse particles by boiling in concentrated sodium hydroxide; (d) neutralizing the pH of said coarse particles; (e) crushing said coarse particles into fine particles such that a first portion of said fine particles comprises substantially enamel material and a second portion of said fine particles comprises substantially dentin material; and (f) separating said first portion from said second portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |