Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1991-06-14
1992-04-28
O'Connor, Cary E.
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433174, A61C 800
Patent
active
051082888
ABSTRACT:
A dental prosthodontic restoration includes at least one implant fixture adapted to be implanted in a jawbone of a patient. The implant fixture has a threaded bore axially disposed therethrough and opening centrally through its gingival end. In one embodiment, the restoration includes a standard abutment having an abutment base having a fitting at its inferior end, a socket at its superior end, and a bore axially disposed through the base and opening centrally through the fitting and the socket. The abutment base is supported on the implant fixture, preferably in a non-rotational manner. The restoration further includes an abutment screw having an externally-threaded shaft for mating with the threaded bore of the implant fixture, a male fitting at its superior end having a polygonal cross-section, and a secondary bore opening through the superior end coaxial with and extending toward the shaft. Preferably, a locking sleeve is provided and has an outer periphery formed in a predetermined shape for mating with the superior socket of the abutment base. A bore is axially disposed through the sleeve and has the same polygonal cross-section as the male fitting at the superior end of the abutment screw. When the abutment base, the abutment screw and the locking sleeve are assembled intra-orally in the patient's mouth, the locking sleeve locks the abutment screw to the abutment base to prevent rotation, movement and loosening of the abutment screw. A similar locking mechanism is provided for coping screw.
REFERENCES:
patent: 4854872 (1989-08-01), Detsch
patent: 4856994 (1989-08-01), Lazzara et al.
patent: 4955811 (1990-09-01), Lazzarra et al.
patent: 4976739 (1990-12-01), Duthie, Jr.
patent: 4988297 (1991-01-01), Lazzara et al.
patent: 4988298 (1991-01-01), Lazzara et al.
Judson David H.
O'Connor Cary E.
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