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.