Dentistry – Method or material for testing – treating – restoring – or... – Anchor pin
Patent
1985-12-19
1988-03-01
Wilson, John J.
Dentistry
Method or material for testing, treating, restoring, or...
Anchor pin
433128, 433167, A61C 504
Patent
active
047282924
ABSTRACT:
A dentinal retention pin and dental tool for inserting the retention pin into the healthy dentine portion of a tooth. A cylindrical hole with a beveled top is predrilled in the tooth to receive a threaded end portion of the pin such that the threads cut into the dentine to secure the pin. A chamfered stop is positioned above the threaded portion, which seats against the beveled top of the hole to limit penetration of the pin into the tooth. The pin is dimensioned to stop before the threaded portion engages the bottom of the hole. A supra-coronal portion of the pin pertrudes above the stop and provides a surface for securely attaching a reconstructed coronal portion to the tooth. A manipulating section of the pin attaches to the supra-coronal section by a frangible link. The manipulating section comprises a cylindrical extension of the pin having a flat engagement surface in a plane approximately along the diameter of the pin. The dental tool for operating the pin has a socket for receiving and retaining the manipulating section, the socket having a flat surface for engaging the corresponding flat engagement surface of the pin. The pin is elastically retained in the socket to permit self-alignment of the pin along the axis of the hole within a range of tool positions.
REFERENCES:
patent: 1837403 (1931-12-01), Brown
patent: 2029734 (1936-02-01), Meitzler
patent: 2338437 (1944-01-01), Karlstrom
patent: 2701914 (1955-02-01), Dietrich
patent: 2801111 (1957-07-01), Kaltenbach
patent: 2994129 (1961-08-01), Tanner et al.
patent: 4219620 (1980-08-01), Carse
Kracht Walter
Lustig Leopold P.
Malata Peter
Gebr. Brasseler
Wilson John J.
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