The glenoid-intramedullary humeral angle: a measurement of compensatory scapular abduction in advanced rotator cuff arthropathy and its potential effects on implant choice.

Background: This study establishes measurements to evaluate pathologic compensation in rotator cuff tear arthropathy and resultant considerations for reverse shoulder arthroplasty.

Methods: Radiographs of patients with intact rotator cuffs were measured establishing interobserver and intraobserver reliability. Reverse shoulder arthroplasty cases performed by a single surgeon were then retrospectively reviewed.

Biochemistry of N-mustard tumour control compounds reconsidered.

The biochemicals and reactions involved in the present mechanism of degradation of tumour cells during chemotherapy are reconsidered and limitations noted. Alternative mechanisms and treatment methods are detailed.

Do 25-Hydroxyvitamin D Levels Correlate With Fracture Complications?

Objectives: To determine the relationship between serum 25-hydroxyvitamin D [25(OH)D] levels and the likelihood of postoperative complications and fracture reoperation rate in orthopaedic trauma patients receiving vitamin D and calcium supplementation.

Design: Retrospective case series.

Setting: Level I trauma center, Midwestern United States.

Effectiveness of Vitamin D Therapy in Orthopaedic Trauma Patients.

Objective: The purpose of this study was to determine the effectiveness of our vitamin D treatment protocol in managing low serum vitamin D levels in orthopaedic trauma patients.

Methods: A retrospective review was conducted of all orthopaedic trauma patients at a university level I trauma center over 20 months. Patients were included if they had an initial and repeat 25-hydroxy (OH) vitamin D serum level available.

The function of oxalic acid in the human metabolism.

Biochemical reactions in cells which involve oxalic acid are described. It is shown that this compound is required for the formation of uracil and orotic acid. The former is a component of RNA which is common to all cells in the human metabolism.