J Korean Fract Soc.  2024 Jan;37(1):60-68. 10.12671/jkfs.2024.37.1.60.

Checkrein Deformity after Fracture

• Ahn J
• Jung GH

• KMID: 2551302
• DOI: http://doi.org/10.12671/jkfs.2024.37.1.60

Abstract

Checkrein deformity has dynamic characteristics in which the degree of extension contracture of the metatarsophalangeal joint and flexion contracture of the interphalangeal joint change according to the movement of the ankle joint. Although the primary lesion is the flexor hallucis longus, several clinical features exist because of the accessory connection with the flexor tendon of other toes. After a physical diagnosis, a radiological examination should be performed to determine the cause and location of adhesion. Moreover, it is vital to determine if it is direct adhesion to the tendon tissue or muscle contracture due to ischemic muscle damage. Although there are no clear guidelines for surgical treatment, it can be divided broadly into two methods: soft tissue release and Z-plasty performed through direct access to the lesion site or indirect access through the tarsal tunnel or medial midfoot approach. Direct tendon tissue release surgery should be attempted if the tendon tissue is locally attached to the fracture callus or specific soft tissue. On the other hand, operation on the lesion site should be performed first if the checkrein deformity occurred due to an implant or bone fragments, followed by release surgery. If muscle contracture and movement are limited due to ischemic damage, surgery should be performed to remove adhesions and additional tendon connections around the flexor hallucis longus and digitorum longus by approaching through the tarsal canal and the medial side of the midfoot. The fixed contractures of the metatarsophalangeal and interphalangeal joints should be addressed if the limitations of tendon excursion are identified despite the release techniques.

Keyword

Checkrein deformity; Contracture; Toes; Tendon lengthening