Effects of thoracolumbosacral orthosis on spinal deformities, trunk asymmetry, and frontal lower rib cage in adolescent idiopathic scoliosis.

Study Design: Prospective study.

Objectives: To document immediate and late changes in shape and balance of the thoracic and lumbar spine and lower rib cage on the frontal plane induced by treatment with a thoracolumbosacral orthosis (TLSO).

Summary Of Background Data: The effect of TLSO on lateral plane of spinal deformity, frontal lower rib cage, trunk balance, and natural history are poorly understood.

Changes in bone mineral density around a stable uncemented total hip arthroplasty.

Changes in bone mineral density (BMD) around the components of the Zweymueller total hip arthroplasty were measured, using dual energy X-ray absorptiometry, in 36 women who were operated on for primary osteoarthritis. Seven regions of interest were studied. No changes occurred around the screw socket and the greater trochanter: but there was a significant reduction of BMD, only when measured immediately after the operation at the lesser trochanter and at the distal femoral cortex lateral and medial to the tip of the stem.

Course of bone mineral content changes around cementless Zweymueller total hip arthroplasty. A 4-year follow-up study.

In this prospective study we followed the bone mineral content (BMC) changes over time in seven zones of interest around uncemented Zweymueller total hip arthroplasty (THA) components, using dual-energy X-ray absorptiometry (DEXA) combined with a radiographical analysis of the distal femoral cortices, close to the tip of the stem. In 36 women (average age 55 years) operated on for primary hip osteoarthritis, BMC of the hips was measured preoperatively and 2 weeks, 1 year and 4 years postoperatively. In particular, a significant decrease of the preoperative values (ranging from 35% to 42.

Periprosthetic bone mineral density after Mueller and Zweymueller total hip arthroplasties.

To assess the adaptive bone changes in adult human hips after insertion of cemented or uncemented acetabular and femoral components for total hip arthroplasty, a retrospective clinical study using dual energy xray densitometry was conducted. A consecutive homogeneous group of 52 female patients with an average age of 61 years was operated on for unilateral hip osteoarthritis. The types of prosthetic components used were the cemented Mueller and the uncemented Zweymueller socket and stem.

Adult idiopathic lumbar scoliosis. A formula for prediction of progression and review of the literature.

Study Design: A retrospective study was conducted of patients with untreated adult-type idiopathic lumbar scoliosis.

Objectives: To construct a mathematical formula that provides accurate progression of an idiopathic adult lumbar scoliosis using initial roentgenographic parameters.

Summary Of Background Data: Osteoporosis, lateral spondylolisthesis of L2-L4, and degeneration of disc and joint may contribute to a poor prognosis for lumbar adult-type scoliosis.

Spinal canal restoration by posterior distraction or anterior decompression in thoracolumbar spinal fractures and its influence on neurological outcome.

Thirty consecutive patients who had suffered unstable fractures and dislocations of the thoracolumbar spine mostly associated with neurologic impairment and bony encroachment on the spinal canal were treated either with Harrington distraction rods combined with sublaminar wires or with the Zielke-VDS device. These patients were subsequently assessed for neurologic outcome, spinal canal clearance, sagittal and coronal spinal deformity correction preoperatively and postoperatively with a minimum follow-up of 26 months. In the follow-up evaluation, the patients who underwent surgery with Harrington rods showed an overall improvement of their neurologic function of 90.

Spontaneous burst fracture of the thoracolumbar spine in osteoporosis associated with neurological impairment: a report of seven cases and review of the literature.

This is a report of seven patients suffering from osteoporosis, who sustained unstable burst fractures in the thoracolumbar spine associated with neurological impairment, without trauma. The manner of presentation, the neurological involvement, the radiological findings, as well as the surgical treatment with respect to functional and neurological recovery are discussed.

Spinal bone mineral density changes following halo vest immobilization for cervical trauma.

In this prospective study we followed the bone mineral density (BMD) changes of the injured cervical spine immobilized with the halo vest. In order to define the natural history of cancellous vertebral bone loss and restoration, dual-energy densitometry was used on each of ten selected cervical spines in the lateral view (1) immediately after the application of the device, (2) at the end of the treatment and (3) 3 months after the removal of the halo vest. The halo vest produces local osteoporosis in the immobilized cervical spine with an overall reduction of BMD averaging 2.