wurzelstift for an artificial zahnaufbau

摘要

The head of the pin attaches the artificial crown. The top part of the pin facing the head is multiple-screw-threaded (1,2,3). The pin has a circular, cylindrical or conical anchor piece (4) for screwing into a prepared tooth-root. The length of the screw-threaded section amounts to 60 to 70 % of the length of the anchor piece. The screw thread has two to four threads, each of which completes three to five revolutions round the anchor piece.