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Journal of Hand Surgery (British and European Volume)
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Articles

Flexor Tendon Repair in a Rabbit Model using a "Core" of Extensor Retinaculum with Synovial Membrane

An experimental study

Y. CHUREI
T. YOSHIZU
Y. MAKI
N. TSUBOKAWA

From the Niigita Hand Surgery Foundation, Niigita, Japan

Correspondence: Y. Maki MD, Niigita Hand Surgery Foundation, 1–18 Shinko-cho, Niigita 950–8556, Japan. E-mail: nii_hand{at}pop01.odn.ne.jp

In this histological and biomechanical study in two groups of rabbits, a piece of the extensor retinaculum with its synovial membrane was inserted as a biological "core" into a hole at the centre of both stumps of a severed tendon, which was repaired with interrupted sutures. In the other group, the tendon was sutured without a "core". In the "core" group, proliferation and migration of fibroblasts from both tendon surfaces and the "core" surface toward the deep layer of the suture site was seen 2 weeks after operation. New collagen fibres, aligned parallel to the long axis of the tendon, could also be seen 4 weeks after operation, and healing was more advanced than in the coreless model. The maximum force to produce a gap in the "core" tendon was 82% greater than in the coreless tendon 4 weeks after operation.

Journal of Hand Surgery (British and European Volume), Vol. 24, No. 3, 267-271 (1999)
DOI: 10.1054/JHSB.1998.0006
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