According to Bipolar Hemiarthroplasty of the Hip (BHA), several reports indicated earlier acquisition of walking ability in direct anterior approach (DAA) than posterior approach (PA), but there is still few randomized studies comparing accuracy of stem insertion in DAA and PA. Therefore, we performed a prospective study, focusing positioning of implant. We chose 29 patients for this study, diagnosed as femoral neck fracture (Garden grade III or IV) from April 2012 to April 2013, excluding obesity patients (body mass index upper than 30kg/m2), muscular patients, osteoporotic patients (Sigh grade I or II), and tumor bearing patients. Patients were enrolled in a prospective, non-blinded study and were randomly assigned by envelope method to receive either DAA or PA. Taperloc BHA system (Zimmer) was adapted for all cases. Patient condition, operation condition and radiographic findings were investigated. On CT imaging, Canal fill was calculated Stem fill was studied at lower point of lesser trochanter that was considered to be load center. Static analysis was carried out using SPSS ver21 (IBMc). Continuous variables between the two groups were compared using a no matched bilateral Student's Purpose
Patient and Methods
