US3787975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor for attaching dental partial or full artificial denture
Assignee: Individual
•
Filing: 1972-09-18
•
Granted: 1974-01-29
•
Expires: 1992-09-18
Abstract
Abstract Method and apparatus for anchoring a dental partial or full artificial denture to the root of a natural tooth that has been cut off at the tissue line during endodontic treatment. The anchor includes a sleeve which extends into the root, the sleeve including a retaining shoulder which cooperates with a shoulder on a pin for removably retaining the pin within the sleeve and is provided with an arcuate rest for the pin, the pin having complementing surface which bears on the rest. The pin is fixed to a dental partial or full artificial denture.
Inventors
- 👤 M Zuest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:05
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/265; A61C13/2656; A61C13/30
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
216 words
An anchor for attaching a dental partial or full artificial denture to the root of a tooth, said anchor comprising in combination, means having a sleeve shaped opening for being inserted into an opening in the root of a tooth below the gum line of the tooth, said sleeve opening having a lower recess with a spherical shaped concave rest surface and a radially inwardly extending shoulder above said recess, a pin for extending into said sleeve opening with a spherical shaped lower end for fitting against said spherical rest surface and said shoulder preventing upward and downward movement of said pin in said sleeve opening, said lower end of said pin having a diameter larger than the diameter of the shoulder opening defined by said shoulder and having sufficient resilience therebetween to squeeze said lower end of said pin through said shoulder opening, said pin above said lower end having a smaller diameter at said shoulder than the diameter of said shoulder opening, said lower end of said pin having a diameter sufficient to fit against the spherical surface of said recess to allow rotational movement therebetween and lateral movement of the upper end of said pin, and means for connecting the upper end of said pin to the dental partial or full artificial denture.
Claim 2
Dependent Claim
216 words
An anchor for attaching a dental partial or full artificial denture to the root of a tooth, said anchor comprising in combination, means having a sleeve shaped opening for being inserted into an opening in the root of a tooth below the gum line of the tooth, said sleeve opening having a lower recess with a spherical shaped concave rest surface and a radially inwardly extending shoulder above said recess, a pin for extending into said sleeve opening with a spherical shaped lower end for fitting against said spherical rest surface and said shoulder preventing upward and downward movement of said pin in said sleeve opening, said lower end of said pin having a diameter larger than the diameter of the shoulder opening defined by said shoulder and having sufficient resilience therebetween to squeeze said lower end of said pin through said shoulder opening, said pin above said lower end having a smaller diameter at said shoulder than the diameter of said shoulder opening, said lower end of said pin having a diameter sufficient to fit against the spherical surface of said recess to allow rotational movement therebetween and lateral movement of the upper end of said pin, and means for connecting the upper end of said pin to the dental partial or full artificial denture.
Claim 3
Dependent Claim
23 words
An anchor as defined in claim 1 in which, the lower end of the pin is a resilienT means that is expandible outwardly.
Claim 4
Dependent Claim
15 words
An anchor as defined in claim 1 in which, said shoulder is resiliently biased inwardly.
Claim 5
Dependent Claim
36 words
An anchor as defined in claim 1 in which, said means having a sleeve shaped opening comprising a coping inserted in the opening in the root of the tooth, which coping has said sleeve shaped opening.
Claim 6
Dependent Claim
20 words
An anchor as defined in claim 1 in which, said means having a sleeve shaped opening comprising a sleeve member.
Claim 7
Dependent Claim
37 words
An anchor as defined in claim 5 in which, said sleeve member having an axially aligned longitudinal lower extension of smaller diameter for extending into the root of the tooth beyond the lower end of said sleeve.
Claim 8
Dependent Claim
59 words
An anchor as defined in claim 1 in which, said lower end of said pin forming a ball, said lower recess having the shape of a ball corresponding to the shape of said lower end of said pin, and said ball shape in said recess extending to said shoulder, forming a socket for said lower end of said pin.
Claim 9
Dependent Claim
31 words
An anchor as defined in claim 1 in which, said sleeve shaped opening having cylindrically shaped sides, and said pin having a diameter substantially less than the diameter of said opening.
Claim 10
Dependent Claim
27 words
An anchor as defined in claim 1 in which, said connecting means having means for rigidly connecting said pin to the dental partial or full artificial denture.
Claim 11
Dependent Claim
77 words
An anchor as defined in claim 9 in which, said sleeve shaped opening having a longitudinal opening therein with sides that diverge outwardly from said shoulder, said pin having outwardly tapering sides extending from said lower end, and said longitudinal opening having a substantially larger diameter than the diameter of said pin for allowing lateral gimbal movement of said lower end of said pin in said recess without said pin contacting the sides of said longitudinal opening.
Claim 12
Dependent Claim
39 words
An anchor as defined in claim 10 in which, said pin being of sufficiently flexible material to allow bending upon lateral movement of the dental partial or full artificial denture with out side movements of said sleeve opening means.
Claim 13
Dependent Claim
24 words
An anchor as defined in claim 11 in which, said pin being made of a flexible material such as Nylor resin or the like.
Claim 14
Dependent Claim
64 words
An anchor as defined in claim 10 in which, a second sleeve element for being mounted on said pin and fitting between said pin and said diverging opening in said sleeve shaped opening, and said second sleeve element functioning to seal the opening between said sleeve shaped opening and said pin and for holding the pin in upright position in said sleeve shaped opening.
Claim 15
Dependent Claim
50 words
An anchor as defined in claim 13 in which, said sleeve shaped opening means having an upper cope for fitting against the upper surface of the tooth root, and said second sleeve element having an outwardly extending cope that fits over the said cope of said sleeve shaped opening means.
Claim 16
Dependent Claim
31 words
An anchor as defined in claim 1 in which, said sleeve shaped opening means being formed into a cope for fitting into a larger opening in the root of a tooth.
Claim 17
Dependent Claim
42 words
An anchor as defined in claim 10 in which, said connecting means comprising an enlarged head on the upper end of said pin, with said head and upper end of said pin being embedded in the dental partial of full artificial denture.
Claim 18
Dependent Claim
37 words
An anchor as defined in claim 6 in which, said sleeve member and said lower extension having a flat outer side for passing holding cement for holding said sleeve member in a hole in the tooth root.
Claim 19
Dependent Claim
38 words
An anchor as defined in claim 1 in which, said connecting means spaces the adjacent surface of the dental partial or full artificial denture from said sleeve shaped opening means and the upper surface of the tooth root.
Claim 20
Independent Claim
154 words
The method of attaching a dental partial or full artificial denture to the root of a tooth when the tooth has been cut off at the tissue line, comprising the steps of, drilling a vertical hole into the tooth root Below the gum line, forming a spherical shaped socket in the hole in the tooth with a shoulder around an opening to the socket, fixing a pin to the denture which pin has a spherical shaped lower head for fitting into the socket through the opening and over the shoulder, and making the socket opening and the pin with a relative space therebetween so that the denture can move laterally with the spherical pin head rotating in the socket without causing side forces to be applied to the tooth, and the lower head abutting the shoulder and the surface of the socket preventing up and down longitudinal movement of the pin in the socket.
Claim 21
Independent Claim
154 words
The method of attaching a dental partial or full artificial denture to the root of a tooth when the tooth has been cut off at the tissue line, comprising the steps of, drilling a vertical hole into the tooth root Below the gum line, forming a spherical shaped socket in the hole in the tooth with a shoulder around an opening to the socket, fixing a pin to the denture which pin has a spherical shaped lower head for fitting into the socket through the opening and over the shoulder, and making the socket opening and the pin with a relative space therebetween so that the denture can move laterally with the spherical pin head rotating in the socket without causing side forces to be applied to the tooth, and the lower head abutting the shoulder and the surface of the socket preventing up and down longitudinal movement of the pin in the socket.
Claim 22
Dependent Claim
31 words
The method as claimed in claim 19, including the step of, inserting a socket receptical into the hole and cementing the receptical therein, which receptical has the internal spherical shaped socket.
Claim 23
Dependent Claim
24 words
The method as claimed in claim 20 being characterized by, the pin head being resilient for snapping through the shoulder opening of the socket.
Claim 24
Dependent Claim
112 words
The method as claimed in claim 21 including the steps of, positioning the pin in the socket with a desired position axial with the tooth root, providing a recess in the denture that when the denture is in the correct position in the mouth the upper end of the pin is in the recess, and filling the recess with a holding material that surrounds the upper end of the pin when the pin is inserted into the recess, which material hardens holding the end of the pin in the denture so that the pin may be removed from the socket in the root with the pin and denture and root socket aligned.
Claim 25
Dependent Claim
46 words
In the method as claimed in claim 22 including the step of, inserting a sleeve between the pin and the upper opening of the root socket, which sleeve holds the pin in centered alignment in the socket and seals the socket from receiving the holding material.
Claim 26
Dependent Claim
92 words
In the method as claimed in claim 27 including the steps of, inserting a pin having a smaller diameter spherical head than the socket into the socket, making an impression of the mouth and teeth with the temporary pin in position, removing the pin from the socket with the impression, placing a temporary socket over the temporary pin and making a model of the patient''s mouth by pouring molding material into the impression including the temporary socket, and then forming a denture with a pin to correspond with the model and socket.
Claim 27
Dependent Claim
80 words
The method as claimed in claim 19 including the steps of, placing a material in the hole in the tooth root, placing a denture in the mouth with the end of the pin projected into the molding material, casting the material with the pin therein, after casting and investment removal, removing the rod from the cast by leaching or the like, and then cementing the casting into the hole to provide the socket for receiving a pin in a denture.
References Cited (Backward Citations)
US866304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |