The effect of capsular tightening on humeral head translations

Idiopathic or surgical tightening of the glenohumeral joint capsule may cause displacement of the humeral head relative to the glenoid fossa and favor the development of instability and/or osteoarthritis.
In the present investigation the relative position of the humerus to the glenoid fossa was determined at the end of the ranges of eight different passive movements before and after selective capsular plication in eight cadaveric shoulders to study the effects of selective capsular plications on the kinematics of the shoulder. [more...]

Pediatric Sacral Fractures

A series of eight pediatric patients with sacral fractures is presented, including epidemiologic and outcome data. Pediatric sacral fracture is a rare entity, must be diligently searched for, is frequently associated with pelvic fractures, usually results from high-impact trauma, and is rarely associated with neurologic deficits. [more...]

Noninvasive Magnetic Resonance to Three-Dimensional Rotational X-Ray Registration of Vertebral Bodies for Image-Guided Spine Surgery

Noninvasive Magnetic Resonance to Three-Dimensional Rotational X-Ray Registration of Vertebral Bodies for Image-Guided Spine Surgery Image-guided orthopedic surgery has the potential to improve accuracy, increase safety, and limit invasiveness of spinal procedures in which navigation is important. [more...]

Underestimation of osteolysis in posterior stabilized total knee arthroplasty.

Periprosthetic osteolysis in total knee arthroplasty (TKA) has become a significant problem. Routine surveillance is warranted to detect problems that may not be symptomatic. [more...]

The biomechanical results of total hip resurfacing arthroplasty

With the advent of more wear-resistant bearings, there is renewed interest in resurfacing total hip arthroplasty. However, there is a paucity of information on the biomechanical results of this type of arthroplasty compared with those of contemporary total hip arthroplasty. [more...]

Lumbar intervertebral body fusion cages: histological evaluation of clinically failed cages retrieved from humans.

Although interbody cages are widely used, there is little histological documentation of the tissue within cages in the human spine. The purpose of this study was to describe the contents of retrieved, clinically failed, interbody cages from human patients, with special reference to the influence of graft type on the viability of bone in the cages. [more...]

Principles and Techniques of En Bloc Vertebrectomy for Bone Tumors of the Thoracolumbar Spine: An Overview

Oncological principles for the resection of tumors affecting long bones
were proposed more than 20 years ago by Enneking, an orthopedic surgical
oncologist, and colleagues. [more...]

Single Versus Multiple Dose Antibiotic Prophylaxis in Lumbar Disc Surgery

These results of this study support the use of single preoperative dose of antibiotics in lumbar disc surgery. This is relevant as many lumbar diskectomy patients are candidates for early hospital discharge. At the authors institution, no increased risk of infection occurred for the single dose group. [more...]

Instruments aid accuracy of THR done through 5-cm incision

NEW ORLEANS — Developers of a keyhole total hip replacement procedure said the minimally invasive technique ensures accurate component positioning and permits patients to rehabilitate quickly.

Human bone morphogenetic protein impacts cartilage repair to one year.

In a rabbit model, defects treated with a single rhBMP-2 dose had a better histological appearance at one year than untreated ones.
CAMBRIDGE, Mass. - Full thickness focal cartilage defects treated with a recombinant human bone morphogenetic protein and followed to one year produced no evidence of cartilage degradation between months six and 12.

Small intestine submucosa offers promise for rotator cuff repair.

A canine study found that using the material as a scaffold led to the development of replacement rotator cuff tendons.
EAST LANSING, Mich. - A study that explored the efficacy of small intestine submucosa as a scaffold for tissue engineered rotator cuff tendons was selected as one of the most important clinical developments of the past year.

FDA rejects bone morphogenic protein pma for tibial nonunions.

The FDA cited OP-1's lack of statistical equivalence compared to autograft in a clinical trial for tibial nonunions. KALAMAZOO, Mich. - The Food and Drug Administration recently determined that the first recombinant human protein premarket approval application for orthopedic applications to come before it for review was not approvable .

New system allows for minimally invasive spine fusion, less pain.

An endoscopic approach drastically reduces blood loss and shortens hospital stay; patient and surgeon satisfaction is high. NEW YORK - The benefits of spinal fusion are well known, as are the perioperative morbidity and postoperative patient pain and discomfort associated with the procedure. A newly developed system, however, could change the way that patients and surgeons view spinal fusions.

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