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Femoral neck targeting is the process of calculating the centre of the femoral neck during hip resurfacing surgery.〔Comis MIHR operative technique〕 This can be done by hand or using electronic aides.〔Imageless navigation of hip resurfacing arthroplasty increases the implant accuracy C. Schnurr & J. W. P. Michael & P. Eysel & D. P. König〕 ==Early implant failure and mal-positioning of femoral components== Follow-up studies of Metal on Metal(MoM) hip resurfacings have shown that some of the reasons for early implant failure are: #Mal-orientation of the implant stem in relation to the femoral neck axis. #Notching of the femoral neck during femoral head preparation. #Exposed cancellous bone after implantation.〔CT-based and fluoroscopy-based navigation for cup implantation in total hip arthroplasty (THA).PMID 12931311〕 Calculating the true centre of the femoral neck in both antero-posterior (AP) and lateral planes is imperative in hip resurfacing surgery.〔OPN, 2008, June issue, Open debate〕 This point of reference allows the surgeon to precisely position the femoral neck stem down the femoral neck. If this is not achieved, and mal-positioning of the femoral component occurs, early implant failure can result.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Femoral neck targeting」の詳細全文を読む スポンサード リンク
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