Allograft versus no graft with a posterior multisegmented hook system for the treatment of idiopathic scoliosis.

Study Design: A prospective, randomized study.

Objective: To compare the clinical results of posterior spinal fusion (PSF) with allograft augmentation versus no graft for patients with adolescent idiopathic scoliosis (AIS).

Summary Of Background Data: The use of allograft has become a standard means of augmenting a PSF.

Contact forces in the subacromial space: effects of scapular orientation.

The purpose of this study was to examine the effects of scapular orientation on clearance in the subacromial space. Eight glenohumeral joints from fresh-frozen human cadavers were secured to an Instron mechanical testing machine via a custom-made translation table. Forces were applied to simulate rotator cuff and deltoid contraction.

Total knee arthroplasty for rheumatoid arthritis.

Abstract Total knee arthroplasty is a proven technique for the management of deformity and unremitting pain in the rheumatoid arthritic knee. Many important considerations must be taken into account in order to maximize the results of total knee replacement in this challenging patient population.