骨折愈合后，股骨骨折中使用的 Küntscher 髓内钉发生断裂。
Breakage of the Küntscher nail in fractures of the femur after healing has occurred.
作者信息
Surdo V, Dalla Pria P
机构信息
Divisione di Ortopedia e Traumatologia dell'Ospedale di Mirano.
出版信息
Ital J Orthop Traumatol. 1991 Mar;17(1):125-30.
PMID:1894508
Abstract
Four cases of breakage of Küntscher intramedullary nails (AO model) are presented. All 4 nails broke after fracture healing had occurred and all 4 presented breakage of the stem in the same site. In these cases breakage of the nails is not due to instability of the fracture, but always derives from superficial micro-cracks, technologically inevitable, due to defects or irregularities in the metal that expand during load application.
摘要
本文报告了4例Küntscher髓内钉（AO型号）断裂的病例。所有4根钉子均在骨折愈合后发生断裂，且所有4根钉子的钉杆均在同一部位断裂。在这些病例中，钉子的断裂并非由于骨折不稳定，而是总是源于表面微裂纹，这在技术上是不可避免的，是由于金属中的缺陷或不规则性在加载过程中扩展所致。
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