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Ultrastructural study of the extra-articular Leeds-Keio ligament prosthesis
1Department of Orthopaedic Surgery, Kawasaki Municipal Hospital, Kawasaki-ku, Kawasaki 210-0013, Japan. edk-nomura@spn1.speednet.ne.jp
Background:
There have been several histological studies of the Leeds-Keio ligament in anterior cruciate ligament reconstruction, but there have been few of the Leeds-Keio ligament in the extra-articular portion.
Aims/Methods:
To report the histological and ultrastructural findings of two cases of medial patellofemoral ligament reconstruction using the Leeds-Keio ligament, removed 6.1 years and 8.7 years after implantation.
Results:
In both cases, the tissue over the Leeds-Keio ligament was a ligament-like tissue. Electron microscopy showed that the diameter of the collagen fibrils in the tissue over the Leeds-Keio ligament was unimodal in the case investigated 6.1 years after implantation but bimodal in the case investigated after 8.7 years.
Conclusions:
The tissue over the Leeds-Keio ligament may continue to grow with prolonged periods of mechanical stress.
