卵圆窗龛后隐窝的应用解剖学研究

Surgical anatomy of posterior oval window niche recess

在100侧干颞骨标本和20侧湿标本上观测了卵圆窗龛后隐窝的形态及邻近结构。卵圆窗龛后隐窝的前后径、上下径及深度在干标本分别为1.9,2.0,1.7mm;在湿标本分别为3.1,1.8,1.6mm。岬小桥是一个关键性结构,其形态分桥状、二分桥状、硬状及板状,能预测卵圆窗龛后隐窝的延伸及分型。构成该隐窝后上界的面神经管凸有42.5%有裂隙,且多近隐窝的上方。这些资料为后鼓室病灶清除术和镫骨手术提供了形态学基础。

Morphology and adjacent structures of the posterior oval window niche recess were observedand measured on 100 adult dry and 20 adult moist temporal bones.Anteroposterior and superoin-ferior diameters and depth of the posterior oval window niche recess were respectively 1.9,2.0and 1.7mm on moist bones.The ponticulus promon torii which has several shapes is a key stru-ture for foretelling the elongation and pattern of the posterior oval window nache recess.Theprominence of facial canal,which forms superoposterior boundary of the posterior oval windowniche recess,was found to have a fissure part(42.5%).