Biomedical subjects

Akio Minami

Publications and source records attributed to Akio Minami.

111 records · Page 7Linked to original sources

PubMedDate not supplied

The effect of graft-tunnel diameter disparity on intraosseous healing of the flexor tendon graft in anterior cruciate ligament reconstruction.

BACKGROUND: Graft-to-tunnel healing is a significant factor in anterior cruciate ligament reconstruction, but there have been few studies on the effect of graft-tunnel diameter disparity on intraosseous healing of the flexor tendon graft. HYPOTHESIS: Graft-tunnel diameter disparity of 2 mm has no effect on the pull-out strength of the graft from the bone tunnel. STUDY DESIGN: Controlled laboratory study. METHODS: Forty-two beagle dogs were divided into three groups. In each animal, reconstruction was performed in the left knee by using a 4-mm diameter autogenous flexor tendon for groups 1 and 2 and by using a 4-mm wide bone-patellar tendon-bone graft in group 3. A 4-mm diameter tunnel was drilled in the tibia of groups 1 and 3 and a 6-mm diameter tunnel, in group 2. In each group, seven animals were sacrificed at 3 and 6 weeks. RESULTS: The perpendicular fibers connecting the graft to the bone were generated in groups 1 and 2, and the number appeared to be higher in group 2, where the space was greater. There was no significant difference in the ultimate failure load between groups 1 and 2 at each period. CONCLUSION: Graft-tunnel diameter disparity of up to 2 mm may not adversely affect intraosseous healing of the flexor tendon graft. CLINICAL RELEVANCE: Surgeons need not be overly concerned about minor graft-tunnel diameter disparities.

Animals↗

PubMedDate not supplied

Callotasis lengthening in patients with brachymetacarpia.

Callotasis lengthening is an established method, but few cases of metacarpal lengthening have been reported. The authors performed callotasis lengthening to treat brachymetacarpia in six digits in three patients. The patient age at the time of distraction ranged from 10 to 19 years. The period of application of an external fixator averaged 13.9 weeks (range 10-19 weeks). All the metacarpals achieved the target length, and all patients were satisfied with the esthetic improvement. The length of the metacarpal distraction averaged 15.2 mm (range 10-18 mm). Complete consolidation of the transport gap was achieved for five of six digits. One digit that had a history of previous lengthening required bone graft. The average healing index was 62.3 days/cm. There were no serious complications. In four digits, the range of flexion of the metacarpophalangeal joint was increased after lengthening, and this enabled the patient to use the digit easily in a palmar grasp. Brachymetacarpia is an appropriate indication for callotasis lengthening in congenital deformities of the upper extremities.

Adolescent↗

PubMedDate not supplied

Long-term results after primary repairs of zone 2 flexor tendon lacerations in children younger than age 6 years.

In young children, methods of primary flexor tendon repair in the digital canal are controversial. The authors reviewed 12 children younger than age 6 years with zone 2 flexor tendon repairs. The mean follow-up period was 8 years. In all cases, the flexor digitorum profundus tendons were repaired according to the Kessler modified technique and the hands were immobilized by an above-elbow cast. As for postoperative complications, there were no fingers with tendon rupture and two fingers with tendon adhesion. One finger needed tenolysis. The total active motion (TAM) in the interphalangeal joints evaluated with the Strickland formula averaged 155 degrees, and the TAM percentage averaged 89% (range 74%-100%). Eleven patients had an excellent result and one had a good result. The percentage phalangeal length averaged 99% (range 96%-100%). Functional motion and nearly normal growth of the finger can be expected after primary zone 2 flexor tendon repairs in children younger than age 6 years.

Child, Preschool↗