Fig. 2

A patient of Group-com. a The length of AP. b Preparation of BC-FMT bone bed based on preoperative 3D simulation positioning. c Preoperative HRCT three-dimensional simulation images. d The implanted BC-FMT with Lifts. * denotes site of sigmoid sinus exposure. BC-FMT = bone conduction floating mass transducer; HRCT = high-resolution computed tomography