Contoured dental posts
AssigneeIPCO Corporation
InventorBernard Weissman
Life of this patent
Estimating the term…
Abstract
A dental post for securely retaining a dental restoration on a prepared tooth stub. The dental post is formed of an elongated cylindrical pin having a longitudinal axis. Helical grooves are provided about the periphery of the pin for retaining the pin secured within a cement prepared bore within the tooth stub. An outer contour is formed along the longitudinal length of the pin to define annular retaining ledges axially spaced apart along the pin interspersed with inwardly tapered pin sections. The ledges serve to aid in the retention of the pin in the bore and increase the strength of the pin reducing the possibility of pin shear.
Claims22
A dental post for securely retaining a dental restoration on a prepared tooth stub, comprising:
- an elongated cylindrical pin having a longitudinal axis;
- helical grooves disposed about the periphery of said pin for retaining said pin secured within a cement prepared bore in a tooth stub;
- and
- an outer contour longitudinally formed into the periphery of the pin to define annular retaining troughs about the pin to further retain said pin secured within the bore.
A dental post for securely retaining a dental restoration on a prepared tooth stub, comprising:
- an elongated cylindrical pin having a longitudinal axis;
- helical grooves disposed about the periphery of said pin for retaining said pin secured within a cement prepared bore in a tooth stub;
- an outer contour longitudinally formed into the periphery of the pin to define annular retaining troughs about the pin to further retain said pin secured within the bore. And comprising
- a first group of grooves having a depth greater than the depth of the troughs and a second group of grooves alternating in sequence with the first group of grooves and having a depth less than depth of the troughs.
A dental post for securely retaining a dental restoration on a prepared tooth stub, comprising:
- an elongated pin for securement within the tooth stub and comprising a plurality of longitudinally tapered sections, annular, radially extending shoulder portions separating adjacent sections, and helical grooves disposed about the periphery of the pin.
A dental post for anchoring a prosthetic device, comprising:
- a head on which said device may be mounted, and a shaft extending therefrom for insertion into a previously prepared bore for securement therein by cement, said shaft including a plurality of longitudinally spaced apart reduced diameter annular throat sections, and helical grooves disposed about the periphery of said shaft, said grooves and throat sections retaining said shaft secured within the cement.
A dental post for securely retaining a dental prosthesis on a prepared tooth stub, comprising:
- an elongated pin for securement within the tooth stub and comprising a longitudinal ratchet surface having portons tapering toward an insertion end and formed peripherally about said pin for one way insertion into the tooth stub, and helical grooves disposed about the periphery of the pin for retaining the pin secured within the cement.
A dental post for securely retaining a dental prosthesis on a prepared tooth stub, comprising:
- an elongated pin having an outer diameter for securement within the tooth stub, elongated sections of reduced diameter spaced along the pin, annular bands of pin sections of a diameter approximating the outer pin diameter, and separating said elongated sections, and helical grooves disposed about said pin for retaining the pin secured in the tooth stub.
Dependencies are inferred from the claim text.