Rigid intrasegmental fixation for repair of a pars defect in a young athlete: case report and description of technique.

Stabilization for the treatment of a pars defect frequently involves fusion with sacrifice of a motion segment. Intrasegmental stabilization has been described, however, with preservation of the motion segment by using various constructs. We describe a method of obtaining rigid fixation across a pars defect without sacrificing a motion segment.

Efficacy of injections of corticosteroids for subacromial impingement syndrome.

A prospective, randomized, controlled, double-blind clinical study was performed to determine the short-term efficacy of subacromial injection of corticosteroids for the treatment of subacromial impingement syndrome. Forty patients were randomized to receive either six milliliters of 1 per cent lidocaine without epinephrine (the control group) or two milliliters containing forty milligrams of triamcinolone acetonide per milliliter with four milliliters of 1 per cent lidocaine without epinephrine (the corticosteroid group). The patients were re-examined serially until completion of the study.

A comparison of blood loss and transfusion requirements in total knee arthroplasty with and without arterial tourniquet.

A retrospective study was undertaken to determine the intraoperative blood loss and the subsequent need for blood transfusion in primary total knee arthroplasty. Fifty-six patients were operated on with the use of an arterial tourniquet (group 1), and 50 patients, without the use of a tourniquet (group 2). The mean intraoperative blood loss was significantly different between the two groups (P = 0.

Normalized and proportionalized cemented femoral stem designs. A 10-year clinical study.

Two hundred fifteen cemented total hip arthroplasties were performed in 184 patients using normalized and proportionalized femoral stems. Normalization or stepped tapering of the stem minimizes development of tensile hoop stresses by altering force transmission from the femoral stem to the cement mantle. The proportionality of the stem was based on an anatomic study that resulted in the development of a series of prostheses achieving a more complete femoral canal fill.

Arthroscopic removal of an osteoid osteoma of the talus: a case report.

This article describes a patient with a 10-year history of persistent ankle pain. Differential diagnosis included osteoid osteoma and anterior ankle impingement. This patient subsequently underwent arthroscopic excision of a lesion on the talar neck following a complete radiographic work-up, which was nondiagnostic.

Use of the orthofix limb alignment grid in the treatment of infantile tibia vara.

The use of a dome osteotomy in the treatment of infantile tibia vara is reportedly associated with insufficient intraoperative assessment of the correction achieved. This article discusses a method to overcome this problem and the long-term advantages of using a dome osteotomy in the treatment of this disease.

A comparison of modified Knowles pins and cannulated cancellous screws for the treatment of nondisplaced or impacted femoral neck fractures.

A prospective study was performed comparing modified Knowles pins to cannulated cancellous screws for the treatment of nondisplaced and impacted femoral neck fractures. Forty-five impacted or nondisplaced fractures were identified: twenty-five were stabilized with modified Knowles pins and twenty with cannulated cancellous screws. Patient follow-up averaged twenty-four months (range 12 to 46 months) or until reoperation.

Infrared. An unseen and unnecessary hazard in ophthalmic devices.

The concept of instrument-induced light damage to the retina is well established. Many have argued that ultraviolet (UV) energy is overwhelmingly responsible and that longer wavelength infrared (IR) energy causes thermal change and plays a minimal role. We suggest that infrared may play a primary role in instrument-induced damage.