Zhang Tian-Yu, Dai Pei-Dong, Xie You-Zhou, Wang Zheng-Min, Wang Ke-Qiang
Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Fudan University, Shanghai 200031, China.
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2006 Nov;41(11):861-4.
To determine the optimal drill area on the footplate with the 3D measurements of the stapes and the vestibular end organs.
Four temporal bones were extracted from the fresh cadavers and undecalcified polymer-embedded. After serially sectioning, image processing and the 3D precisely reconstruction, a local Cartesian coordinates was established in which the tympanic surface of the footplate was supposed to be XY plane and the Z coordinate axis passed through the central point of the footplate and was vertical to the XY plane. The configurations of the utricle and saccule were delineated quantitatively, and then any distance between one point on the surface of the footplate and another point on the surface of the utricle or saccule and its orientation can be measured.
There was a "V" shaped cleft between the utricle and the saccule. The angle of the" V" shaped cleft was 50.31 +/- 19.90 (17.00 - 68.00) degrees. The apex of the cleft directed anterosuperiorly and approached the footplate center, while beneath the posteroinferior part of the footplate was an open and deep area. The vertical distance from the center point of the footplate to the vestibular end organs was (2.20 +/- 0.548) mm, the maximum of 3.0 mm and the minimum of 1.6 mm.
The posterior and inferior quadrant of the footplate may be the optimal drill area for the fenestra.
通过对镫骨和前庭终器进行三维测量来确定镫骨足板上的最佳钻孔区域。
从新鲜尸体中取出四块颞骨，进行未脱钙聚合物包埋。连续切片、图像处理及三维精确重建后，建立局部笛卡尔坐标系，其中镫骨足板的鼓膜面为XY平面，Z坐标轴穿过足板中心点并垂直于XY平面。定量描绘椭圆囊和球囊的形态，进而可测量足板表面一点与椭圆囊或球囊表面另一点之间的任何距离及其方向。
椭圆囊和球囊之间有一个“V”形裂隙。“V”形裂隙的角度为50.31±19.90（17.00 - 68.00）度。裂隙顶端指向前上方并靠近足板中心，而在足板后下部下方是一个开放且较深的区域。从足板中心点到前庭终器的垂直距离为（2.20±0.548）mm，最大为3.0mm，最小为1.6mm。
镫骨足板的后下象限可能是开窗的最佳钻孔区域。
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