Kaftan Holger, Böhme Andrea, Martin Heiner
*Department of Otorhinolaryngology and Head and Neck Surgery, University of Greifswald, Greifswald, Germany; and †Institute for Biomedical Engineering, University of Rostock, Rostock, Germany.
Otol Neurotol. 2014 Aug;35(7):1150-5. doi: 10.1097/MAO.0000000000000448.
The prosthesis length in malleostapedotomy for otosclerosis revision surgery can be calculated if the prosthesis length of previous conventional incus stapedotomy is known.
Malleostapedotomy is used in revision surgery for otosclerosis in case of severe incus erosion and malleus or incus fixation.
Fifteen cadaveric human temporal bone specimens were investigated by means of micro-CT followed by 3D analysis. The distance between the incus and the stapes footplate as well as distances between the malleus and the footplate were measured and compared.
The required length of virtually bent prostheses corresponded approximately to the 1.5-fold of virtual stapes prostheses in 93%. The addition of 2 mm predicted the required prostheses length almost correctly in 80%.
The clinical practice will show whether a preoperative calculation of expected prosthesis length in MS based on the length of the formerly used stapes prosthesis is possible and helpful.
如果已知先前传统砧镫关节切开术的假体长度，那么在耳硬化症翻修手术的镫骨足板切开术中可以计算出假体长度。
在严重砧骨侵蚀以及锤骨或砧骨固定的情况下，镫骨足板切开术用于耳硬化症的翻修手术。
通过微型计算机断层扫描（micro-CT）对15个尸体人类颞骨标本进行研究，随后进行三维分析。测量并比较砧骨与镫骨足板之间的距离以及锤骨与足板之间的距离。
93%的情况下，虚拟弯曲假体所需长度大约相当于虚拟镫骨假体的1.5倍。增加2毫米在80%的情况下几乎能正确预测所需假体长度。
临床实践将表明，基于先前使用的镫骨假体长度对镫骨足板切开术中预期假体长度进行术前计算是否可行且有帮助。
