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Objective To investigate the effect of cemented artificial hip rnreplacement in the treatment of senile femoral neck fracture.Method Follow up the 18 patients with senile femoral neck fracture who received bony cemented artificial hip replacement during January 1999 to September 2001.Mean following- up duration:15.7 months(3～ 23).Result Harris score:15 cases got excellent result,3 cases got good result,none got fair result.Total X ray plain film:Position of prothesis was normal with no loosing,heterotopic ossification or dislocation. Conclusion (1)Variant cemented artificial hip replacements all have satisfying effect in near future.(2)It is feasible for patients with poor economic condition to choose native prothesis in arthroplasty.(3)Di- polar artificial thigh bone replacement is a better choice for weak patient with great rnage. rn