Methods The changes of anterior chamber angle in 31 cases (41 eyes) with senile cataract were observed with ultrasonic biomicroscopy after ECCE and posterior chamber implantation of IOL.

方法用超声生物显微镜观察老年性白内障囊外摘除术及后房型人工晶体植入术后，31例（41只眼）的房角改变。

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Objective: To analyse the loss of spinal corrective angle after posterior-instrumentation operations on thoracic-lumbar fractures.

目的：回顾性分析后路内固定治疗胸腰椎骨折术后脊柱矫正角度丢失的有关原因。

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Objective To compared the posterior slop between tibial plateau and meniscus in Chinese population for determining the angle of tibial osteotomy during total knee replacement(TKA).

目的：测量、比较分析中国人胫骨后倾角与半月板后倾角，为人工全膝关节置换术中胫骨侧截骨提供参考。

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