Plontke Stefan K, Radetzki Florian, Seiwerth Ingmar, Herzog Michael, Brandt Silvio, Delank Karl-Stefan, Rahne Torsten
*Departments of Otorhinolaryngology, Head and Neck Surgery, †Orthopedic and Trauma Surgery, and ‡Diagnostic and Interventional Radiology, University of Halle-Wittenberg, Halle (Saale), Germany.
Otol Neurotol. 2014 Aug;35(7):1251-7. doi: 10.1097/MAO.0000000000000405.
To evaluate the benefit of a preoperative three-dimensional (3D) planning tool for surgically placing the bone conduction floating mass transducer (BC-FMT) of the Bonebridge (BB) bone conduction implant.
Adult patients (n = 5) and one pediatric patient (n = 1) with conductive or mixed hearing loss caused by chronic ear disease, malformation, or single-sided deafness.
INTERVENTION(S): Development of a preoperative planning tool that allowed free adjustment of the implant in an individual 3D model of the skull to evaluate completely fitting the BC-FMT into a bony bed and to identify an optimal implant position. Implantation of the BB with mastoid or retrosigmoid placement after individual preoperative planning and "virtual surgery".
Feasibility of the preoperative 3D planning process, transfer into the intraoperative situation, and audiologic results after BB implantation.
Individual preoperative planning was considered beneficial especially in cases of small mastoid bone volume, for example, because of previous canal wall down mastoidectomies, and in the case with malformation.
For optimal placement of the BC-FMT of the BB, preoperative 3D planning is recommended especially in primarily small poorly pneumatized mastoids, hypoplastic mastoids in malformations, reduced bone volume after canal wall down mastoidectomy, or the small mastoids in children. Effort should be made to reduce segmentation and surgical planning time by means of automation.
评估一种术前三维（3D）规划工具对骨桥（BB）骨传导植入体的骨传导浮动质量传感器（BC-FMT）进行手术放置的益处。
患有由慢性耳部疾病、畸形或单侧耳聋引起的传导性或混合性听力损失的成年患者（n = 5）和一名儿科患者（n = 1）。
开发一种术前规划工具，该工具可在个体颅骨3D模型中自由调整植入体，以评估BC-FMT完全适配骨床的情况并确定最佳植入位置。在进行个体术前规划和“虚拟手术”后，采用乳突或乙状窦后入路植入BB。
术前3D规划过程的可行性、向术中情况的转化以及BB植入后的听力学结果。
个体术前规划被认为是有益的，特别是在乳突骨体积较小的情况下，例如由于既往开放式乳突根治术，以及存在畸形的情况下。
为了使BB的BC-FMT实现最佳放置，建议进行术前3D规划，特别是在原发性小气房化乳突、畸形中的发育不全乳突、开放式乳突根治术后骨体积减少或儿童中的小乳突的情况下。应努力通过自动化减少分割和手术规划时间。
