Hato N, Welsh J T, Goode R L, Stenfelt S
Department of Veterans Affairs Medical Center, and the Division of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, CA, USA.
Otolaryngol Head Neck Surg. 2001 Mar;124(3):274-8. doi: 10.1067/mhn.2001.113664.
In middle ear surgery using intact ear canal wall techniques, the buttress, which is the bony bridge at the medial end of the posterior-superior bony ear canal, is commonly retained during posterior tympanotomy. In some cases, the surgical exposure may be improved by resectioning the buttress, and this requires sectioning the posterior incudal ligament. To date, the acoustic effects of removing the buttress with sectioning of the attached ligament have not been studied.
Using a laser Doppler vibrometer system, 15 human cadaver temporal bones were measured with 80 dB sound pressure level at the tympanic membrane over the 0.1 to 10 kHz frequency range.
The resection of the buttress and sectioning the posterior incudal ligament had no effect on stapes footplate velocity.
These results suggest that the posterior incudal ligament does not play a significant role in the acoustic function of the ossicles.
在采用完整耳道壁技术的中耳手术中，后上骨质耳道内侧端的骨桥即支撑结构，在鼓室后壁切开术中通常予以保留。在某些情况下，切除支撑结构可能会改善手术视野，而这需要切断后砧骨韧带。迄今为止，切断附着韧带后切除支撑结构的声学效应尚未得到研究。
使用激光多普勒振动计系统，在15具人类尸体颞骨上，于鼓膜处以80分贝声压级在0.1至10千赫频率范围内进行测量。
切除支撑结构并切断后砧骨韧带对镫骨底板速度没有影响。
这些结果表明，后砧骨韧带在听小骨的声学功能中不起重要作用。
