Aluminum oxide ceramic pins for retrograde root filling--experiences with a new system.

Retrograde root filling is, under certain conditions, the last chance to keep the functional ability of the teeth. With a new method using aluminum oxide ceramic pins for retrograde root filling, we believe that this aim may be achieved with greater success than with other methods. A success rate of 95% (out of a total of 164 teeth) after 1 year is the result of our investigation. The requirements of retrograde root filling are met in a high degree because of the excellent biologic compatibility of the ceramic material and the high marginal tightness with the use of conical pins.