Sagittal malalignment after intramedullary fixation of proximal third tibial shaft fractures has been described frequently, but almost every reported case involves a procurvatum deformity. We report 2 cases of recurvatum deformity of proximal third tibial shaft fractures where the Synthes EX tibial nail was used. The recurvatum deformity may have been induced by the shape of the nail, with its more distal Herzog curve relative to designs from other manufacturers. In proximal third tibial shaft fractures, tibial nails with distal Herzog curves may induce a recurvatum deformity that is not easily correctable. [Orthopedics. 20XX;XX(X):xx–xx.]

中文翻译：

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Synthes胫骨内钉治疗胫骨近端骨折的反屈畸形

近端第三胫骨干骨折髓内固定后的矢状面排列不齐已被频繁描述，但几乎所有报告的病例都涉及前屈畸形。我们报告了 2 例使用 Synthes EX 胫骨钉的近端第三胫骨干骨折的反屈畸形。反屈畸形可能是由指甲的形状引起的，与其他制造商的设计相比，其 Herzog 曲线更远。在近端第三胫骨干骨折中，具有远端 Herzog 曲线的胫骨钉可能会导致不易矫正的反屈畸形。[骨科。20XX;XX(X):xx–xx.]