Minty I, Maffulli N, Hughes T H, Shaw D G, Fixsen J A
Department of Radiology, Hospital for Sick Children, London, U.K.
Acta Radiol. 1994 Nov;35(6):555-9.
We report our experience in radiographic imaging in limb lengthening procedures using callotasis for limb lengthening discrepancy with the Orthofix dynamic monoaxial external fixator. Seventeen patients (average age at operation 10.8 years) completed 22 bone segments (7 femora, 11 tibiae, 4 ulnae) lengthening procedures. The average time for formation of good medullary bridging was over 6 months. The commonest radiographic abnormality was a periosteal reaction around the pin sites seen in 14 patients, while evidence of pin loosening was present in 10. All patients with pin loosening also showed periosteal reaction which pre-dated the loosening in 5 of 12 patients by an average of 47 days. Angulation was detected in 9 patients in the a.p. plane, and in 6 in the lateral plane. Six patients developed a ragged radiolucent region through the newly forming bone at an average of 95 days from the corticotomy but with uneventful healing.
我们报告了使用Orthofix动态单轴外固定器通过骨痂延长术治疗肢体延长差异时的影像学经验。17例患者（手术平均年龄10.8岁）完成了22个骨段（7个股骨、11个胫骨、4个尺骨）的延长手术。形成良好髓内桥接的平均时间超过6个月。最常见的影像学异常是14例患者针道周围的骨膜反应，10例存在针松动迹象。所有针松动的患者也都有骨膜反应，其中12例中有5例骨膜反应比针松动提前出现，平均提前47天。9例患者在前后位平面检测到成角，6例在侧位平面检测到成角。6例患者在距截骨平均95天时，在新形成的骨中出现了参差不齐的透亮区，但愈合顺利。
