legg-calvé-perthes disease (lcpd) is an idiopathic osteonecrosis of the femoral head with variable complications and resultant deformity of the femoral head and osteoarthritis. suggested risk factors are acetabular retroversion, obesity, latitude, hyperactivity, and coagulopathy. the most commonly applied classification is based on radiolucency in the lateral pillar of the femoral head, which i...

This study presents the results of four Ligamentum Teres (LT) reconstruction procedures for hip instability with an average of 21.4 months follow-up (range 16.4–27.8). The indication for reconstruction was patients who complained of hip instability (hip giving way on gait or activities of daily living) on a background of a connective tissue disorder and generalized ligamentous laxity. The follo...

BACKGROUND Although periacetabular osteotomy (PAO) for developmental dysplasia of the hip (DDH) provides conceptual advantages compared with other osteotomies and reportedly is associated with joint survivorship of 60% at 20 years, the beneficial effect of proper acetabular reorientation with concomitant arthrotomy and creation of femoral head-neck offset on 10-year hip survivorship remains unc...

Background Femoral retroversion has been noted as a possible risk factor for poor clinical results after hip arthroscopic surgery. Purpose To compare the outcomes of the arthroscopic treatment of hip abnormalities in patients with femoral retroversion to patients with femoral anteversion between 10° and 20°. Study Design Cohort study; Level of evidence, 3. Methods Between November 2011 an...

BACKGROUND AND PURPOSE Perthes' disease leads to radiographic changes in both the femoral head and the acetabulum. We investigated the inter-observer agreement and reliability of 4 radiographic measurements assessing the acetabular changes. PATIENTS AND METHODS We included 123 children with unilateral involvement, femoral head necrosis of more than 50%, and age at diagnosis of 6 years or olde...

Abstract Background Finite element analysis (FEA) has been previously applied for the biomechanical of acetabular dysplasia and osteotomy. However, until now, there have little reports on use FEA to evaluate effects pelvic tilt stress distribution in acetabulum. Methods We used Mechanical Finder Ver. 7.0 (RCCM, Inc., Japan) construct finite models based 3D-CT data patients, designed dysplasia, ...