[Experimentation of the relationship between medial or lateral patellar stabilizer and patellofemoral stabilization].

Objective: To study the contribution of medial or lateral stabilizer to the stability of the patella, to explore the function and effect of releasing the LPR clinically and to provide a biomechanical basis for the clinical treatment of patellar instability(PI).

Methods: The quadriceps femoris of 6 fresh human cadaver knees were loaded to simulate a normal condition of muscle strength. First the loading force was measured and recorded, which subluxated the patella with the different degrees of knee flexion.

[Clinical outcomes of total hip arthroplasty using Wagner SL revision stem in femoral intertrochanteric fractures for patients with old fracture or painful arthritis before injury].

Objective: To retrospectively study the clinical results of total hip arthroplasty(THA) using Wagner SL revision stem for patients with femoral intertrochanteric fracture.

Methods: From 2006 January to 2009 December, 29 consecutive patients with femoral intertrochanteric fractures were performed THA using Wagner SL revision stem and intertrochanteric reconstruction, including 18 males and 11 females with an average age of 49 years old ranging from 43 to 58. Among them, 8 cases were oboslete femoral intertrochanteric fractures and 21 cases were the intertrochanteric fractures with painful arthritis before injuries.

[The effects of DEHP on morphology and function of progenitor Leydig cell in rat].

Objective: To investigate the effects and mechanisms of diethylhexylphthalate (DEHP) on morphology and function of progenitor Leydig cells (PLC) in rats.

Methods: Twenty pregnant SD rats were randomly divided into 4 groups ( n = 5): normal control group, DEHP low dose group , middle dose group, and high dose group, which were treated from postnatal day (PND) 1 to PND 21 of the pubs with DEHP at the doses of 0, 10, 100, 750 mg/(kg · d) in 0.5 ml of corn oil by gavage respectively.