US4078310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making crowns and bridges and the occlusal and lingual stamp therefor
Assignee: Individual
•
Filing: 1976-07-15
•
Granted: 1978-03-14
•
Expires: 1996-07-15
Abstract
Abstract In the method of making dental crowns and bridges, wherein from a bite simulating articulated master model of the patient's jaws, there has been sliced and separated a master die of the particular tooth and adjacent jaw requiring a crown or bridge, the steps of marking a contrasting finish line on and around the master die, and applying a layer of plastic sheet spacing material around said die down to the finish line. Further steps include applying a supportive plastic coping over the spacing material overlapping the finish line, and thereafter trimming said coping at the finish line and simultaneously forming a V-shaped channel around the die in registry with the finish line. Further steps include removing the spacing material and reapplying the master die and coping to the master model. Applying molten wax into the cavity of a preselected metal stamp having an occlusal or lingual anatomy approximating the optimum shape of the particular tooth creating a preformed occlusal pattern the depth of the stamp. Inverting the occlusal pattern while plastic over said coping while applying axial pressure and heat, joining said pattern to said coping, and the final step with the master die removed from the master model, of applying molten wax to all lateral surfaces of the die from the margin to the occlusal pattern contouring same to the anatomical shape of a tooth. The occlusal stamp refers to the posterior occlusal surface of the teeth. The lingual stamp refers to the anterior lingual surface of the teeth. There are two separate stamps the occlusal and the lingual stamp. The occlusal or lingual stamp includes a metal base having a preformed margin defining a cavity adapted to receive molten wax, said cavity being of a predetermined shape of an occlusal or lingual anatomy corresponding to the optimum desired natural shape and size for a particular tooth.
Inventors
- 👤 Otto A. Horger, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002; A61C13/00; A61C13/0003; A61C5/00; A61C5/70; A61C5/77; A61C11/00; A61C11/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
235 words
In the method of making dental crowns and bridges, wherein from a bite simulating articulated master model of the patient's jaws, there has been sliced and separated therefrom a master die of the particular tooth and adjacent jaw requiring a crown or bridge; the following steps: a. marking a contrasting finish line on and around the master die; b. applying a layer of plastic sheet spacing material around said die down to said finish line; and simultaneously c. applying a tooth build up plastic coping or backing over said spacing material; d. trimming said coping at said finish line and simultaneously forming a V-shaped channel around the master die in registry with said finish line; e. reapplying said master die and coping to the master model, first removing said spacing material; f. applying molten wax into the cavity of a preselected metal occlusal stamp, having an occlusal anatomy corresponding to the optimum desired natural shape for that particular tooth, creating a preformed occlusal pattern the depth of the stamp; g. inverting the occlusal pattern while plastic over said coping, while applying axial pressure thereto adhering said pattern to said coping while applying heat thereto; h. and with the unit die, coping and occlusal pattern removed from the master model, applying molten wax to all lateral surfaces of the die from the margin to the occlusal pattern, contouring same to the anatomical shape of a tooth.
Claim 2
Dependent Claim
235 words
In the method of making dental crowns and bridges, wherein from a bite simulating articulated master model of the patient's jaws, there has been sliced and separated therefrom a master die of the particular tooth and adjacent jaw requiring a crown or bridge; the following steps: a. marking a contrasting finish line on and around the master die; b. applying a layer of plastic sheet spacing material around said die down to said finish line; and simultaneously c. applying a tooth build up plastic coping or backing over said spacing material; d. trimming said coping at said finish line and simultaneously forming a V-shaped channel around the master die in registry with said finish line; e. reapplying said master die and coping to the master model, first removing said spacing material; f. applying molten wax into the cavity of a preselected metal occlusal stamp, having an occlusal anatomy corresponding to the optimum desired natural shape for that particular tooth, creating a preformed occlusal pattern the depth of the stamp; g. inverting the occlusal pattern while plastic over said coping, while applying axial pressure thereto adhering said pattern to said coping while applying heat thereto; h. and with the unit die, coping and occlusal pattern removed from the master model, applying molten wax to all lateral surfaces of the die from the margin to the occlusal pattern, contouring same to the anatomical shape of a tooth.
Claim 3
Dependent Claim
40 words
In the method of maaking dental crowns and bridges of claim 1, said assembly being adapted for the final steps of investing, burning out the wax, and casting with a suitable dental alloy in accordance with the lost wax process.
Claim 4
Dependent Claim
37 words
In the method of making dental crowns and bridges of claim 1, the additional step before step (e) of applying a separating agent to the opposing areas of the master model for registry with the waxed crown.
Claim 5
Dependent Claim
20 words
In the method of making dental crowns and bridges of claim 1, said spacing material being about 0.025 MM thick.
Claim 6
Dependent Claim
24 words
In the method of making dental crowns and briges of claim 1, said coping being built up to a thickness of about 0.060 MM.
Claim 7
Dependent Claim
66 words
In the method of making dental crowns and bridges of claim 1, said metal occlusal stamp having a perhiphal margin surrounding its cavity, said stamp being selected from the group of occlusal stamp cavity shapes including lingual anatomy upper central, lingual anatomy lower lateral, occlusal anatomy lower molar, occlusal anatomy upper molar, occlusal anatomy, upper and lower bicuspid molar, and occlusal anatomy upper and lower cuspids.
Claim 8
Dependent Claim
46 words
In the method of making dental crowns and bridges of claim 1, said metal occlusal stamp having a raised peripheral margin and a base defining said cavity of predetermined anatomical shape; and a support shaft at one end joined to and projecting axially of said base.
Claim 9
Dependent Claim
32 words
In the method of making dental crowns and bridges of claim 7, an annular enlargement upon said shaft intermediate its ends to facilitate manipulation of said stamp for steps (g) and (h).
Claim 10
Dependent Claim
20 words
In the method of making dental crowns of claim 1, said finish lines being applied with a red ballpoint pen.
Claim 11
Dependent Claim
24 words
In the method of making dental crowns of claim 1, said spacing material being in one or two layers to achieve the maximum fit.
Claim 12
Dependent Claim
27 words
In the method of making dental crowns of claim 1, the sides of the master die defining said V-shaped channel being at an angle of about 45°.
Claim 13
Dependent Claim
41 words
In the method of making dental crowns of claim 1, after the selection of the predetermined proper occlusal stamp as to size and shape of cavity, the further step before step (f) of applying a separating agent to the cavity surfaces.
Claim 14
Dependent Claim
40 words
In the method of making dental crowns and bridges of claim 1, the further step following step (g) of cooling the die, coping and pattern and separating and removing the metal stamp, leaving the wax pattern attached to the coping.
Claim 15
Dependent Claim
35 words
In the method of making dental crowns of claim 1, the further step before step (h) of replacing the master die, coping and formed wax pattern into the articulated master model and checking the bite.
Claim 16
Dependent Claim
61 words
In the method of making dental crowns of claim 14, the further steps, when the wax pattern is placed out of occlusion, the wrong wax stamp applied, or said stamp is too high or too low, of melting the first applied wax pattern, applying the additional molten wax to the occlusal surface and restamping the crown in accordance with step (g).
Claim 17
Dependent Claim
42 words
In the method of making dental crowns of claim 15, the further step before step (h) of manipulating the metal stamp and its formed wax pattern until the best possible occlusion is obtained, with the master die still assembled in the model.
Claim 18
Dependent Claim
93 words
An occlusal or lingual stamp for use in the making of dental crowns and bridges comprising: a metallic base having a preformed peripheral margin defining a cavity adapted to receive molten wax when the cavity is positioned to open upwardly, said cavity being of a predetermined shape and occlusal or lingual anatomy corresponding to the optimum desired natural shape and size for a particular tooth of any human mouth, and a shaft of reduced size relative to said base at one end secured to said base and extending axially away from said cavity.
Claim 19
Dependent Claim
93 words
An occlusal or lingual stamp for use in the making of dental crowns and bridges comprising: a metallic base having a preformed peripheral margin defining a cavity adapted to receive molten wax when the cavity is positioned to open upwardly, said cavity being of a predetermined shape and occlusal or lingual anatomy corresponding to the optimum desired natural shape and size for a particular tooth of any human mouth, and a shaft of reduced size relative to said base at one end secured to said base and extending axially away from said cavity.
Claim 20
Dependent Claim
23 words
In the occlusal and lingual stamp of claim 17, an enlargement upon said shaft intermediate its ends to facilitate manipulation of said stamp.
Claim 21
Dependent Claim
51 words
In the occlusal and lingual stamp of claim 17, there being a set of said lingual and occlusal stamps for a particular size of tooth, with each stamp having a different cavity, corresponding respectively to the general anatomical lingual and occlusal shape of all of the teeth of both human jaws.
Claim 22
Dependent Claim
206 words
In the method of making dental crowns and bridges, wherein from a bite simulating articulated master model of the patient's jaws, there has been sliced and separated therefrom a master die of the particular tooth and adjacent jaw requiring a crown or bridge; and wherein a contrasting finish line is marked on and around the master die; a plastic coping is applied to the die, trimmed to said finish line and a V-shaped channel is formed around the master die in registry with said finish line; and said master die and coping is reapplied to the master model, the following steps: a. applying molten wax into the cavity of a preselected metal stamp, having a lingual or occlusal anatomy corresponding to the optimum desired natural shape for that particular tooth, creating a preformed occlusal pattern the depth of the stamp; b. inverting the occlusal pattern while plastic over said coping, while applying axial pressure thereto adhering aid pattern to said coping while applying heat thereto; c. and with the unit die, coping and occlusal pattern removed from the master model, applying molten wax to all lateral surfaces of the die from the margin to the occlusal pattern, contouring same to the antomical shape of a tooth.
Claim 23
Dependent Claim
206 words
In the method of making dental crowns and bridges, wherein from a bite simulating articulated master model of the patient's jaws, there has been sliced and separated therefrom a master die of the particular tooth and adjacent jaw requiring a crown or bridge; and wherein a contrasting finish line is marked on and around the master die; a plastic coping is applied to the die, trimmed to said finish line and a V-shaped channel is formed around the master die in registry with said finish line; and said master die and coping is reapplied to the master model, the following steps: a. applying molten wax into the cavity of a preselected metal stamp, having a lingual or occlusal anatomy corresponding to the optimum desired natural shape for that particular tooth, creating a preformed occlusal pattern the depth of the stamp; b. inverting the occlusal pattern while plastic over said coping, while applying axial pressure thereto adhering aid pattern to said coping while applying heat thereto; c. and with the unit die, coping and occlusal pattern removed from the master model, applying molten wax to all lateral surfaces of the die from the margin to the occlusal pattern, contouring same to the antomical shape of a tooth.
References Cited (Backward Citations)
US1507476A
Cited
US3905106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |