Prosthodontic restoration components
AssigneeImplant Innovations, Inc.
InventorsRichard J. Lazzara, Keith D. Beaty
Life of this patent
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Abstract
In a dental post and coping combination in which the coping is a tubular envelope open at one end, a shoulder around the base of the post which has an annular surface on the locus of a first curvilinear surface, and an annular meeting surface around the open end of the coping which is on the locus of a second shallower curvilinear surface cone, so that when the two parts are assembled the two surfaces meet on the locus of a circle that coincides with the larger periphery of at least one of the two surfaces.
Claims9
The combination of a dental post and a generally tubular coping intended to envelop the post when the two are assembled on a common axis, said post having an annular shoulder disposed around said axis as a center providing an annular support surface extending between an outer periphery and a inner periphery substantially transverse to said axis for receiving an annular end of said coping, said coping having at said end extending between an outer periphery and an inner periphery substantially transverse to said axis an annular meeting surface disposed around said axis as a center, said combination characterized in that said meeting surface lies on the locus of a first curvilinear surface, said support surface lies on the locus of a second curvilinear surface, said curvilinear surfaces are each symmetrical around said axis, and said curvilinear surfaces are so contoured each relative to the other that when said coping is assembled to said post the first contact between said meeting and support surfaces will occur on the locus of a circle that coincides with the larger periphery of at least one of said meeting and support surfaces, and said meeting and support surfaces will be maintained separate from each other at their respective inner peripheries.
In combination a dental post fitted in a patient's mouth and an artificial tooth supported on said post, said post having at its base an annular shoulder extending between a larger periphery and a smaller periphery substantially at the gum line, said tooth having a cavity for enveloping said post and having at the open periphery of said cavity an annular meeting surface extending between a larger periphery and a smaller periphery of said open periphery, said meeting surface being in contact with said shoulder only at the larger periphery of said meeting surface, the larger periphery of said shoulder and the larger periphery of said meeting surface having like sizes and contours, said shoulder and said meeting surface being shaped to assure that when said tooth is fitted to said post said larger peripheries will meet first, so as to form a tight margin at said gum line, and to maintain a separation between said smaller peripheries of said shoulder and said meeting surface.
Dependencies are inferred from the claim text.