Method and apparatus for the withdrawal of dental post
OwnerDoron Benadoinventor
Life of this patent
Estimating the term…
Abstract
A method for the removal of broken threaded dental posts, whose heads have been sheared off, from their receiving bores by exposing the post in its bore together with its extraction, without a need for an additional pulling device. A hollow cylindrical body accommodates precisely the neck of the broken post. The cylinder has saw teeth at its lower rim and an extension of a solid shaft at its upper end by which it is attached to the head of a dental drill. The counter clockwise rotation of the cylinder cuts a circular groove around the post which facilitates its release and withdraw of the post by screwing it out of its bore.
Claims8
A method for the removal of an embedded broken dental post, said post comprises a stem and a head, said head having been sheared off, comprising the steps of:
- encircling said exposed stem of said broken post with a hollow cylinder, wherein the inner diameter of said hollow cylinder matches with the outer diameter of said stem so as to frictionally engage said stem;
- cutting a groove around said stem of said post with said hollow cylinder, said cylinder having cutting teeth at the circumference of its lower rim in order to expose it from the surrounding cement or dental material;
- rotating said hollow cylinder in a counterclockwise direction, whereby said stem rotates together with said hollow cylinder due to friction and screws its way out from its bore.
A combination of a broken stem of a dental post and a apparatus for the removal of the broken stem portion from a receiving bore within a tooth, the combination comprising:
- an embedded broken stem portion of a dental post from which a head portion has been sheared off;
- a cylindrical body having a hollow cylindrical interior cavity, the inner diameter thereof dimensioned to frictionally grip said stem portion when placed there over;
- and
- a drill head, said cylindrical body coupler to said drill head;
- whereby when said drill head is rotated, said cylinder is rotated to rotate said frictionally gripped post such that said stem portion is withdrawn from the receiving bore in the tooth.
Dependencies are inferred from the claim text.