Attaching a tooth crown to un-parallel tooth root systems

Abstract

Abstract A method for attaching a tooth crown to a parallel or non-parallel tooth root system or single rooted tooth in one form comprising the following steps: A. drilling a pin-mated hole in one or each of the root filled tooth roots to be used for fixation of the crown to the desired diameter or length and in the direction of the root canal; B. inserting headed impression pins into the prepared holes; C. taking an accurate impression of the tooth concerned with the headed impression pins in position in the tooth to their full depth; D. pouring up an accurate stone die on the said impression; E. removing the impression pins from the die and inserting the matching final retentive pin to be used into the hole provided; F. positioning a tube or sleeve adjusted to the correct length over the said final retentive pin; the said tube or sleeve having a melting point substantially greater than that of the metal to be used for the casting of the crown; G. waxing up the desired shape of the requisite casting around the said tube or sleeve; H. removing the final retentive pin from the root canal holes through the tube or sleeve; I. sprewing the wax pattern and casting the said pattern in the desired material around the said high melting point sleeves or around the said graphite rods or the dissolve out tubes or oxidizable rods; J. dissolving out the tubes or drill out the graphite rods within the casting where necessary, depending on the technique used; Or cleaning the investment out of the sleeves within the casting prior to adjustment and polishing in the laboratory; K. locating the casting in position on the tooth root and passing the final retentive pins through each of said sleeves into the root canals; L. cementing the pins in position through the sleeves and into the root canals described above; M. cementing a crown over the core described above.

Inventors

• 👤 Andrew Neville Corbett

Bibliographic Details