[Imaging reasons for periprosthetic femoral fractures during the operation of total hip arthroplasty with anatomic prosthesis].

Objective: To explore the imaging reasons for periprosthetic femoral fractures during the operation of total hip arthroplasty with anatomic prosthesis.

Methods: The fracture group consisted of 7 cases with periprosthetic femoral fracture (PPFF) and the non-fracture group 21 cases without PPFF during the operation of total hip arthroplasty (THA) among the 144 cases of primary THA with anatomic prosthesis. The preoperative plain films of hip joint were taken to calibrate the Sharp's angle, centre edge (CE) angle, femoral neck shaft angle, femoral anteversion angle of neck, bowing angle of proximal femoral shaft part, width of narrowest part in proximal femoral shaft.

[Dermal hypoesthesia after total knee arthroplasty].

Objective: To observe the incidence of skin sensory loss after total knee arthroplasty (TKA) and its natural history over time, and to identify the relationship between numbness area and incision length, tourniquet time, age and gender.

Methods: In the study, 132 patients (20 males and 112 females, with an average age of 69.75 years old, 135 cases of TKA) who underwent primary TKA with midline incisions were chosen and grouped chronologically (4 years, 3 years, 2 years, 1 year, 6 months, 1 month) to the investigation time point from Peking University First Hospital.

[Treatment of unstable chronic anterior cruciate ligament-deficient knee with osteoarthritis].

Objective: Untreated ruptures of anterior cruciate ligament (ACL) lead to progressive meniscus tear and development of knee osteoarthritis over decades. The present study was designed to explore the early results of ACL reconstruction for the patients with unstable ACL-deficient knee with osteoarthritis.

Methods: Twelve patients with a mean age of 46 years (range: 35 - 54) underwent ACL reconstruction for ACL-deficient knee with osteoarthritis.