Age and sex-related distribution of alpha angles and the prevalence of the cam morphology of the hip in Asians do not differ from those of other ethnicities.

Purpose: This study was performed to evaluate the effects of age on the alpha angle and the incidence of asymptomatic cam morphology.

Methods: The radiographs of asymptomatic individuals between ages 8 and 22 were retrospectively collected. A total of 1417 individuals were included and grouped according to age: 8-12 (Group A), 13-18 (Group B), and 19-22 (Group C) years.

Acetabular Insufficiency Fracture Following Prolonged Alendronate Use and the Failure of Total Hip Arthroplasty in "Frozen" Bone: Two Cases Report.

Atypical insufficiency fracture of the femur following prolonged bisphosphonate use is well described. Regardless of the cause, insufficiency fracture of the acetabulum is extremely rare, and no reports have described insufficiency fractures of the acetabulum that are associated with prolonged bisphosphonate use. This report demonstrates the possibility of insufficiency fracture at the acetabulum following long-term alendronate use and the necessity of particular care in managing insufficiency fractures in "frozen" bone.

Amyloid Arthropathy of the Hip Joint Associated with Multiple Myeloma: A Case Report.

Amyloidosis is a disease characterized by the deposition of non-soluble fibrous protein in multiple tissues with a number of possible causes. This protein deposition can occur in any tissue, yet is most commonly seen in kidneys, heart, and gastrointestinal tracts. However, invasion to bone tissues is not often reported.

Does the Time of Postoperative Bisphosphonate Administration Affect the Bone Union in Osteoporotic Intertrochanteric Fracture of Femur?

Purpose: This study was designed to investigate the effect of bisphosphonate administration starting time on bone healing and to identify the best administration time following surgical treatment of osteoporotic intertrochanteric fractures.

Materials And Methods: Two hundreds and eighty four patients (284 hips; 52 males, 232 females) who underwent surgery following osteoporotic intertrochanteric fracture from December 2002 to December 2012 were retrospectively analyzed. The average follow-up period was 68.

Asymmetric epiphyseal closure of the femoral head as a potential cause of the primary cam lesion: a case report.

Cam-type femoroacetabular impingement is a pathologic condition caused by repetitive impact of the abnormal femur on a normal acetabular rim, resulting in damage to the articular cartilage. Excluding cases with known underlying diseases, the development of primary cam deformity is not well understood. Here, we describe a patient with cam-type femoroacetabular impingement exhibiting delayed epiphyseal closure at the site of the cam lesion.

Meniscus allograft transplantation for discoid lateral meniscus: clinical comparison between discoid lateral meniscus and nondiscoid lateral meniscus.

Purpose: This study was performed to compare the clinical results of meniscus allograft transplantation (MAT) after total meniscectomy in torn discoid lateral meniscus (DLM) and nondiscoid lateral meniscus (NLM).

Methods: We conducted a retrospective study of 36 patients who underwent MAT. The discoid and nondiscoid groups consisted of 16 and 20 patients, respectively.