目的 对应用三维头模及定位钛板矫治单侧复杂眶颧骨折继发畸形这一方法 及其疗效进行总结和探讨.方法 术前对所有患者行薄断层CT检查,获取DICOM数据,应用快速成型技术制作患者的原始三维头模和经镜像处理后的三维头模.在原始三维头模上进行健、患侧对比、分析和测量,然后在经镜像处理后的三维头模上弯制定位钛板.术中在定位钛板引导下截骨复位颧骨颧弓,并进行眶壁重建和植骨.结果 2007年3月至2009年2月,于临床应用7例,手术过程顺利.术后1周CT检查,患侧颧骨颧弓的位置和外形与健侧基本对称,无术后感染、植入物移位等并发症.7例中有3例术后3个月进行了复查,2例面部外形基本对称,1例颧面部出现瘢痕挛缩,颞区软组织萎缩,需行二期软组织整复.结论 应用三维头模制作术中定位钛板,引导治疗单侧复杂眶颧骨折继发畸形,方法 简单,临床效果可靠.%Objective To discuss the application of 3-D skull models and guide plates in treatment of unilateral orbitozygomatic deformity after fracture. Methods Each patient underwent CT scan and DICOM data was obtained preoperatively. Two 3-D resin skull models were produced by rapid prototyping technique. The first model was produced based on the patient' s original data and the second was the reshaped model by mirroring the unaffected facial side to the traumatic side. The original model was used for measurement of the fracture displacement in three directions and model surgery. On the second model, one 2.0 mm miniplate (Synthes Inc) was bended along the orbital rim as the repositioning guide plate. During the operation, osteotomy and reduction of zygomatic and the periorbital fractures was guided by prepared repositioning guide plate, following by orbital wall reconstruction and bone grafting. Results From March 2007 to February 2009, 7 cases (6 males and 1 female) were treated successfully with no infection or graft extrusion. One week after operation, the patient received CT examination again. The shape and location of zygomatic bone and arch was good. Three cases were followed up for 3 months.Among them, facial symmetry was achieved in 2 cases. Cicatricial contracture and temporal soft tissue atrophy occurred in one case. Conclusions Reliable therapeutic effect can be achieved by application of rapid prototyping technique and repositioning guide plate in the treatment of complicated posttraumatic orbitozygomatic deformity.
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