Biomedical subjects

M I Boyer

Publications and source records attributed to M I Boyer.

39 records · Page 3Linked to original sources

PubMedDate not supplied

The use of the Ilizarov technique in the correction of limb deformities associated with skeletal dysplasia.

The skeletal dysplasias are a unique and heterogeneous group of disorders with skeletal manifestations including deformity, disproportion, and short stature. The purpose of this article is to describe the use of the Ilizarov technique in the management of these orthopedic problems in 15 patients with skeletal dysplasias. The technique is particularly appropriate in those patients requiring correction of angular deformity and limb lengthening. The greatest number of complications were encountered in those patients undergoing extended limb lengthening. Nevertheless, all patients achieved their preoperative goals.

Adolescent↗

PubMedDate not supplied

Operative correction of swan-neck and boutonniere deformities in the rheumatoid hand.

A swan-neck or boutonniere deformity occurs in approximately half of patients with rheumatoid arthritis. The cause of boutonniere deformity is chronic synovitis of the proximal interphalangeal joint. Swan-neck deformity may be caused by synovitis of the metacarpophalangeal, proximal interphalangeal, or distal interphalangeal joints. Numerous procedures are available for the operative correction of these finger deformities. The choice of surgical procedure is dependent on accurate staging of the deformity, which is based on the flexibility of the proximal interphalangeal joint and the state of the articular cartilage. The patient's overall medical status and corticosteroid use, the condition of the cervical spine, the need for operative treatment of large joints, and the presence of deformities of the wrist and metacarpophalangeal joints must also be considered when planning treatment. In the later stages of both deformities, soft-tissue procedures alone may not result in lasting operative correction.

Adrenal Cortex Hormones↗

PubMedDate not supplied

Transplantation of epiphyseal plate allografts between animals of different ages.

The purpose of the experiment was to study growth of epiphyseal plate allografts after transplantation into subjects of a different age, thus preparing for future transplantation of epiphyseal plate or extremity allografts in children. Microvascular transplantation of proximal tibial epiphyseal plate allografts was performed in skeletally immature New Zealand White female rabbits. The growth of 9-week-old epiphyseal plate allografts was examined in both 9-week-old and 17-week-old recipients, as was the growth of 17-week-old epiphyseal plate allografts in 17-week-old recipients. Immunosuppression was with cyclosporine (Cyclosporine A). Successful transplants were confirmed with 99mTc-MDP isotope scanning, and growth was evaluated with weekly standardized radiographs until death. Growth rate was found to depend on the age of the donor epiphyseal plate and was independent of the age of the recipient. This has clinical implications for the procurement of donor tissue in potential transplantation of epiphyseal plate allografts in children.

Age Factors↗