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目的：探讨计算机辅助制作快速原型对正颌手术病人术中颌骨截骨的指导意义。方法：20例病人术前根据CT数据制作快速原型，原型上模拟截断上下颌骨，弯制钛板，手术中指导上下颌骨截骨。术后半年评价手术效果。结果：20例病人手术顺利，术后效果满意。合平面基本水平，面部基本对称。结论：快速原型模拟截骨可以精确指导正颌手术的截骨位置及截骨量。“,”Objective:Using computer software to design the operation plan on patients with asymmetry deformities,then make rapid prototyping in order to evaluate the curative ef ect after operation using this technology. Methods:Al patients’ rapid prototyping are maded from CT date. Imitating to cut bone on Rapid prototyping. Data was obtained and used to guide the operation. Final y evaluate the operative ef ect half a year after operation. Results:The 20 patients obtained satisfactory results and facial deformities were corrected successful y. The biteplane was horizontal. The face was symmetric. Conclusion:Rapid prototyping technology was helpful to guide the operation.