Bone mineral density of the proximal femur after hip resurfacing arthroplasty: 1-year follow-up study.

Background: Hip resurfacing arthroplasty (HRA) is considered a bone-preserving procedure and may eliminate proximal femoral stress shielding and osteolysis. However, in addition to implant-related stress-shielding factors, various patient-related factors may also have an effect on bone mineral density (BMD) of the proximal femur in patients with HRA. Thus, we studied the effects of stem-neck angle, demographic variables, and physical functioning on the BMD of the proximal femur in a one-year follow-up.

Muscle strength and range of movement deficits 1 year after hip resurfacing surgery using posterior approach.

Purpose: The aim was to evaluate the effect of the posterior surgical approach on hip muscle strength and range of movement (ROM).

Methods: Maximal isometric external and internal rotator strength of the hip muscles and bilateral leg extension strength were measured by dynamometers. Active (AROM) and passive (PROM) range of motion of the hip were measured by goniometers in 30 patients before and 3, 6 and 12 months after hip resurfacing.

External rotation strength deficit after hip resurfacing surgery.

Purpose: The aim was to assess the effect of resurfacing hip arthroplasty on hip muscle function, when, in the posterior approach, the piriformis tendon and outer rotators of the hip joint were divided. The unoperated side was used as a control.

Methods: Thirty-three consecutive patients (mean age 55 years, 73% males) were operated using the posterior approach.

Effect of intramedullary gradual elongation of the shorter limb on gait patterns.

Background: Seven young patients were followed 52 weeks after intramedullary lengthening for limb length discrepancy (LLD). The mean LLD before surgery was 3.0 +/- 1.