Use of pulsed electromagnetic fields in treatment of loosened cemented hip prostheses. A double-blind trial.

A double-blind trial of pulsed electromagnetic fields (PEMFs) for loosened cemented hip prostheses was conducted at two centers. Of the 40 patients who enrolled, 37 met entry criteria and were available for analysis. All patients completed six months of treatment (either active or control units).

Epiphyseal stapling for angular deformity at the knee.

Fifty six patients with angular deformities of eighty-two knees were treated with epiphyseal stapling between 1954 and 1973 and followed until maturity. There were sixty-four knock-knees and eighteen bowlegs. In twelve patients with concurrent leg-length discrepancies, long legs were stapled asymmetrically.

Comparison of functional performance after McKee-Farrar, Charnley, and Muller total hip replacement. A six-month follow-up of one hundred sixty-five cases.

Measurements of functional performance were compared before and at 6 months after 58 McKee-Farrar, 50 Charnley, and 57 Muller total hip replacements in 143 patients. The measurment included: range of motion of the hip, hip abductor and adductor-muscle torque, weight-bearing activity during standing, forces applied to canes or crutches, and multiple components of walking performance. Each group of patients improved significantly after surgery in all of the components measured.

Kinesiology after McKee-Farrar total hip replacement. A two-year follow-up of one hundred cases.

Measurements of functional performance were made before and at six and twenty-four months after 100 McKee-Farrar total hip replacements in eighty-three patients. The measurements included: range of motion of the hip, hip-muscle torque, weight-bearing activity during standing, forces applied to canes or crutches, and multiple components of walking performance. In the absence of serious complications, most patients had improvement in most components of function, with greater gains occurring during the first six months and lesser but continued gains between the sixth and twenty-fourth postoperative months.