采用解剖器械对臀区进行由浅入深的解剖，分离出梨状肌上下孔的神经、血管。
The buttock of corpses were dissected from the superficial to the deep by the anatomic instrument, separating the nerves, blood vessels of drilling through the piriformis' upper and lower hole.
目的：为研制适于腕骨四角融合术的内固定器械及手术方式提供解剖学参数。
Objective: to provide anatomic parameters for the surgical operation and designing the internal fixation instruments for four-corner arthrodesis.
目的：为新型脊柱前路短节段内固定器械的设计提供解剖学依据。
Objective: to supply the anatomical basis for the design of short segment anterior internal fixation instrument for the spine.
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