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Table 2 Strydom classification and suggested treatment for posterior tibial tendon dislocation [9]

From: Simultaneous traumatic dislocation of the posterior tibial tendon and long peroneal tendon: a case report

Type 1—retinacular avulsion (most common)

(a) Retinaculum is avulsed of medial malleolus

(b) Retinaculum is avulsed of medial malleolus with a bony rim

(a) Transosseous suture repair

(b) Transosseous suture repair

or

Nonoperative treatment

Type 2—retinacular tear

The retinaculum is ruptured

Repair with sutures

Type 3—deficient tissue

The tissue of the retinaculum is deficient

Reconstruction of the retinaculum with a periosteal flap