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Categories: Abstracts, 2015, Podium

Plantar plate reconstruction of the metatarsophalangeal joint using the EDL tendon

E. Ballas, J. Jalali, P. Briggs

¹Freeman Hospital, Orthopaedics, Newcastle upon Tyne, United Kingdom

Introduction: The attachment of the plantar aponeurosis to the proximal phalanx of the toe, through the plantar plate (PP), forms the main flexor of the toe during gait by the reversed windlass mechanism. Disruption of the plantar plate is a common cause of pain, instability and toe deformity. Surgical techniques have recently been described to repair tears but long term results are awaited. This study aims to review the results of a technique designed to reconstruct and reinforce the failed plantar plate and restore the reversed windlass.

Methods: Through a dorsal extra-articular approach the EDL tendon of the affected toe is used to restore the mechanical link between the proximal phalanx and the plantar aponeurosis on the plantar aspect of the joint. 42 PP reconstructions in 39 patients (36 female) aged 44-72 were undertaken, most frequently on the 2^nd toe. 25 required correction of hallux valgus and four had undergone this previously. Follow up was 2-81 months.

Results: Normal alignment and joint stability was obtained in 33 toes (81%). These patients reported no pain and were completely satisfied with the final result. Recurrence of the deformity with an unstable joint occurred in 8 toes, requiring revision surgery. Failure was more likely with pre-operative dislocation, lateral subluxation, or multiple toe involvement. Minor complications occurred in 5 patients.

Conclusions: Repair or reconstruction of the plantar plate for lesser claw toe deformity is a logical option for correcting the deformity, and restoring toe function and the reversed windlass mechanism. The extra-articular approach may reduce the risk of joint stiffness, avoid scarring of the plantar tissues, and avoid toe elevation associated with metatarsal shortening. This approach is designed to reinforce the weakened plantar plate and may be a satisfactory alternative and more durable technique than direct plantar plate repair.

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Tags: Lesser Toes

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