A surgical technique using landmarks of the temporal bone for Bonebridge implantation.

Objectives: Bonebridge implantation is usually performed on a planned site of temporal bone with guidance of preoperative CT scan. However, planning of the exact site for BMT is difficult due to variations of anatomical structures. We present an implantation technique using common surgical landmarks of mastoid bones such as the tegmen mastoideum and the sigmoid sinus. Methods: A small hole in the mastoid bone was made first in keeping with the planned position for the BMT using preoperative CT scan, then the tegmen mastoideum and the sigmoid sinus through the hole were identified. After two structure were identified and then the cortical bones over the structures were removed. If the tegmen mastoideum and the sigmoid sinus displaced inferior and anterior. The bone bed was widen inferior to the tegmen mastoideum and anterior to the sigmoid sinus. Results: This technique allows exact positioning of the BMT by identifying the surgical landmarks first and minimizes the risk of complication. Conclusions: A surgical technique using landmarks such as the tegmen mastoideum and the sigmoid sinus for Bonebridge implantation is useful and safe. [ABSTRACT FROM AUTHOR]