Dental pin for tooth restoration

Claim 1

In combination with a tooth having a broken-away portion, which tooth is restored to its original configuration by a body of amalgam, with at least one hole being drilled into the dentine of said tooth that is in communication with said broken-away portion, a dental pin for holding said body in position in said tooth, which pin includes: a. a circumferentially serrated wire substantially longer than the depth of said hole, with said wire being formed from a rigid metalLic material that is substantially corrosionresistant; b. a layer of high content silver metal which envelops said wire, with the transverse cross section of said wire and said layer enveloping same being substantially less than that of said hole; and c. a quantity of plastic amalgam in said hole that is in surface contact with said layer when a lower portion of said pin is disposed in said hole with an upper part of said pin projecting from said hole and completely disposed in said body when in a plastic state, which amalgam in said hole and in said plastic amalgam body dissolves a part of said silver in said layer to form a zone of silver-enriched amalgam that merges both into the undissolved silver of said layer as well as into said amalgam that has been so enriched, with said amalgam and silver-enriched amalgam, when metallurgically solidified, bonding said body to said pin by said silver, silver-enriched amalgam, and the nonsilver-enriched amalgam forming an integral mass that prevents longitudinal movement of said body relative to said pin, and with said body being further restrained from longitudinal movement relative to said pin due to the mechanical engagement of said solidified amalgams which engage said serrations defined by said silver layer.