The irregular anatomical form of femoral Proximal marrow dismatch with the regular Pseudocorpus. hanale, is one of the main reasons to cause lessening of pseudocorpus after operation.

• 摘要股骨近端髓腔不规则的解剖形态与目前规则的假体杆柄不完全匹配，是引起术后假体松动的主要原因之一。