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Biomedical subjects

A D Steffee

Publications and source records attributed to A D Steffee.

24 records · Page 2Linked to original sources
PubMed1987

A morphometric study of human lumbar and selected thoracic vertebrae.

The results of a morphometric study of selected human vertebrae undertaken to provide data for implant design are presented in this report. Twenty-seven dimensions were measured from thoracic (T2, T7, T12) and lumbar (L1-L5) vertebrae using prepared spinal columns from 30 skeletons belonging to the Hamann-Todd Osteological Collection. Maximum and minimum pedicle dimensions indicated that the pedicles are less symmetric cephalad than they are caudal. Vertebral body height increases caudally except posteriorly where, after an initial increase, it decreases in the lower lumbar region. Major and minor body diameters and the major spinal canal diameter slightly increase caudally, whereas minor spinal canal diameter exhibits little or no change.

Female↗
PubMed1986

Trapeziometacarpal total joint replacement using the Steffee prosthesis.

The first forty-five Steffee trapeziometacarpal total joint replacements that were used to treat severe trapeziometacarpal arthritis in thirty-eight patients were analyzed retrospectively. The length of follow-up ranged from two through six and one-half years. Forty-two of the arthroplasties resulted in relief of pain, and the restoration of strength and motion was highly satisfactory. Although radiographs showed a high incidence of asymptomatic radiolucent lines at the bone-cement interface of the trapezial component, only three patients had symptomatic loosening. We concluded that trapeziometacarpal total joint replacement can provide good relief of pain and restore function of the thumb to patients with severe trapeziometacarpal arthritis, although further study is necessary to assess the long-term results of the procedure.

Arthritis, Rheumatoid↗
PubMed1986

Total vertebral body and pedicle arthroplasty.

Two new spinal procedures, a total vertebral body replacement using a one-stage posterior approach, and artificial pedicle replacement for extensive decompression laminectomies, are performed with the aid of a special segmental spine plating system. These spine plates, with their unique individual pedicle screw placement, create immediate and totally-rigid fixation as well as segmental control of each vertebral body. Surgeons are now free to perform laminectomies to their fullest extent without the consequence of an uncorrected, unstable back. The purpose of the procedure is to permit the patient to recover without immobilization or prolonged bed rest, and to return to normal activity and work without pain. Three cases are presented to demonstrate potential surgical indications and techniques.

Aged↗
PubMed1986

Segmental spine plates with pedicle screw fixation. A new internal fixation device for disorders of the lumbar and thoracolumbar spine.

A new segmental spine plate fixation system, utilizing a posterior approach and screw fixation, has been developed for disorders of the lower thoracic or lumbar spine. The indications are significant instability and severe pain relieved by immobilization. This new system uses multiple segmental fixation points through the pedicle "force nucleus" of the vertebral body. The spine plates can be contoured for anatomic positioning, reduction, and rigid stabilization to enhance graft consolidation and fusion. The surgical fixation technique is demonstrated in five case presentations illustrating the application and versatility of the method.

Adult↗
PubMedDate not supplied

Lumbar spinal stenosis. A cause of continued pain and disability in patients after total hip arthroplasty.

Eight patients, all with continued posterior hip pain following total hip arthroplasty, were seen during a 15-month period. In each patient, that pain and other disabling symptoms were traced to a degenerated, stenotic lumbar spine. The relationship of lumbar stenosis to degenerative hip disease is presented. Myelography was used to diagnose the stenosis in all patients, and findings were confirmed at laminectomy. Wide decompressive laminectomy and partial facetectomy was followed by complete relief of pain and other disabling symptoms in the 6 patients who were able to undergo it.

Aged↗