PMC8450979_01
Non-weight-bearing radiographs at the previous clinics. No dislocation or arthritic change in the second and third metatarsophalangeal joints is observed. (a) Dorsoplantar view and (b) oblique view.
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The initial non-weight-bearing radiographs revealed no dislocation or arthritic changes in the second and third MTP joints (Figure 1).
Weight-bearing radiographs at our hospital. (a) Dorsoplantar view: mild hallux valgus deformity is presented. (b) Lateral view: the second and third metatarsophalangeal joints reveal dorsal dislocation.
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After 2 years, dorsal dislocations of these joints were noted on a lateral radiograph (Figure 2).
Magnetic resonance imaging indicating rupture of the plantar plates. (a) Second metatarsophalangeal joint T2-weighted fat suppression image. (b) Third metatarsophalangeal joint T2-weighted fat suppression image.. Arrowhead: location of the plantar plate.
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Magnetic resonance imaging revealed synovial fluid retention in the second and third MTP joints, and the plantar plates of both joints were ruptured from the proximal phalanx and retracted under the metatarsal head (Figure 3).
Plain radiographs obtained 5 months postoperatively. A collapse is observed at the third metatarsal head.
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A collapse of the third metatarsal head was observed at 5 months postoperatively (Figure 4), and pain in the foot during walking gradually became worse.
Weight-bearing radiographs obtained at 1 year after surgery. No re-dislocation of the metatarsophalangeal joint nor recurrence of hallux valgus is observed. (a) Dorsoplantar view and (b) lateral view.
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Neither re-dislocation of the MTP joint nor recurrence of hallux valgus was observed (Figure 5).