Fratura de Jones e Fraturas do Metatarso Guia Completo para Diagnóstico e Tratamento

FN2 Pawn Fracture Neck of 2nd Metatarsal Foot Jones Fracture The base of the 5th metatarsal bone is divided into 3 zones to define fracture location Zone 1 zone 2 Zone 3 Zone 1 fracture most common avulsion fracture hypothesized to occur secondary to pull of the peroneus brevis tendon on the metaphysis Zone 2 metaphysealdiaphyseal junction fracture considered a true Jones fracture is caused by adduction force applied to the lateral side of the foot Zone 3 diaphyseal stress fracture caused by repetitive stress swellinginflammationmicrofractures It may not be visible on initial foot radiographs and it is prone to nonunion quick progression on Xray needs more investigation Magnetic resonance Imaging MRI technetium99 bone scan or Computed Tomography CT Zone 1 fractures are treated with 68 weeks partial weightbearing in a protective cast or a removable boot Zone 2 and Zone 3 fractures are prone to nonunion so nondisplaced fractures are treated by nonweightbearing in a cast while others need internal fixation with a screw