Total hip arthroplasty performed with a tissue-preserving technique using superior capsulotomy.

Purpose: We present a minimally invasive tissue-sparing posterior superior (TSPS) approach that intends to protect the abductor muscles during total hip arthroplasty, prevents the release of the short rotator muscles, and provides the surgeon with the option to repair the posterior capsule. We hypothesized that the TSPS technique would produce a better clinical outcome, faster recovery, and lower complication rates, and that it would not jeopardize acetabular component position.

Methods: A retrospective, observational study was conducted in a consecutive series of patients.

Histological fibrosis may predict the failure of core decompression in the treatment of osteonecrosis of the femoral head.

Purpose: Osteonecrosis of femoral head (ONFH) is histopathologically characterized by necrotic areas associated with reactive fibrosis, trabecular bone remodeling and thickening zones. Our double goal was to evaluate if: 1) main ONFH risk factors were related to specific histological specimen patterns 2) different histological patterns were related to the final outcome after a core decompression (CD) procedure.

Methods: This observational longitudinal cohort study respected the STROBE statement.