In consideration of the size of oval window, the new type of hydroxyapatite ossicular prosthesis T-type (Apaceram®-T) whose shaft was 1.3mm instead of the original shaft of 0.8mm in diameter was designed in order to increase its stability. The new shaft became larger than original one 1.6 times in diameter, and 2.6 times in area.
We reported the new type of Apaceram®-T and its clinical application of 15 ears. The new type of Apaceram®-T is considered to be useful for reconstruction of the ossicular chain, judging from adaptation, stability, and postoperative hearing gain.
