[Comparison of clinical effects of minimally invasive femoral head replacement and proximal femoral nail antirotation in the treatment of comminuted intertrochanteric fracture in the elderly].

Objective: To analyze the clinical effect of minimally invasive femoral head replacement and proximal femoral nail antirotation(PFNA) internal fixation at the same time in the treatment of elderly patients with comminuted intertrochanteric fracture.

Methods: From April 2020 to October 2020, 76 elderly patients with comminuted intertrochanteric fracture treated by minimally invasive femoral head replacement and PFNA were analyzed retrospectively. There were 35 patients in the prosthetic group, including 24 females and 11 males with an average age of (86.

[Comparison of clinical efficacy of femoral calcar prosthesis replacement and intramedullary nail in the treatment of elderly patients with intertrochanteric fracture].

Objective: To analyze the clinical efficacy of hip arthroplasty with femoral calcar prosthesis and proximal femoral nail fixation(PFNA) in the treatment of elderly patients(≥80 years old) with unstable intertrochanteric fractures(Evans Ⅲ, Ⅳ).

Methods: From June 2016 to March 2018, 60 elderly patients with unstable intertrochanteric fractures treated with prosthetic replacement and PFNA were retrospectively analyzed. According to the surgical methods, they were divided into PFNA group and prosthesis group.

[Biomechanical research of SOX9, CTGF in bone tendon junction healing].

Aim: To investigate the biomechanical effect of SOX9, CTGF in bone tendon junction healing.

Methods: 36 adult New Zealand rabbits were randomly divided into A, B and C groups(each group were 12 rab-bits). Group A with SOX9 inject into bone tendon junction;Group B with CTGF inject into bone tendon junction; C group was inject nothing.