Methods of preparation of a tooth by reduction thereof

Details Methods of preparation of a tooth by reduction thereof Methods of preparation of a tooth by reduction thereof

1994-02-02

1995-04-04

O'Connor, Cary E.

Dentistry

Method or material for testing, treating, restoring, or...

433166, 433218, A61C 500

Patent

active

054031877

ABSTRACT:
Methods of preparation of a tooth by reduction thereof are provided, so as to permit very accurate tooth reduction in preparation for subsequent placement of a crown, onlay, inlay, or other crown or bridge prosthodontic procedure. Such preparation requires that at least a portion of the material of the tooth, its enamel and/or dentin, is to be reduced; and in order to do so, a series of grooves must first be cut into the tooth structure to a specific and predetermined depth. By the present invention, the depth of tooth reduction to be effected is determined, and a dental burr is chosen to cut a series of grooves each having that predetermined depth. After the series of groove reduction have been cut, the cut groove reductions are then connected using a suitable grinding burr so as to grind away the standing enamel and/or dentin lands between the grooves reductions and thereby achieve a reduction of the tooth structure to that predetermined depth. The depth of cut of each groove reduction, once determined, is achieved by using a dental burr that has a cutting projection that extends beyond a shoulder formed along the axial length of the dental burr, which cutting projection has a cutting surface on its outer periphery that can cut into the enamel and/or dentin of a tooth. Thus, when a groove is cut and the cutting projection extends into the tooth structure, the shoulder will impinge upon the surface of the tooth structure at each side of the groove being cut, and thereby preclude further depth advancement of the dental burr beyond the predetermined depth. The preparation steps may also be used for onlay or inlay procedures to reduce and cover or encapsulate existing silver amalgam material already in place in the tooth structure.

REFERENCES:
patent: 4992049 (1991-02-01), Weissman
Majchrowicz, DMD, Mike, "Quality Control for Successful Crown and Bridge", Dentistry Today, May 1993.
Dale, DMD, Barry G. et al, "Tooth Preparation Outline Form" Dentistry Today, May 1993.
Farah, John W., "Porcelain Inlays and Outlays: Why, When and How", Dentistry Today, May 1993.
Fundamentals of Fixed Prosthodontics, Quintessence Publishing Co., Chapter 3, "Preparation for Full Veneer Crowns", pp. 115-122.
Martignoni, M. et al., "Positioning the Crown Margin", Precision Fixed Prosthodontics Clinical and Laboratory Aspects, Quintessence Publishing Co, 1990, pp. 74-94.

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