Abstract

A dowel pin for removably mounting a dental model cast relative to a base cast. The dowel pin includes a head portion and a shank portion axially extending therefrom. The head portion is adapted to be fixedly secured in the dental model cast and the shank portion is adapted to be removably insertable into a complementary opening in the base cast. The head portion includes an externally threaded male member axially extending therefrom with a collar surrounding the base of the male member. The outer diameter of the collar proximates the diameter of the shank portion so that it can enter into the opening in the base cast. The shank portion has an internally disposed complementary thread which receives the male member therein. A tool is provided for engaging a free end of the shank portion in order to both thread and unthread the shank portion to and from the head portion, so that the dental model cast or segments thereof can easily be replaced and removed from the base cast. Preferably, another tool is provided for extracting the shank portion from the opening in the base cast after it has been disengaged from the head portion.