CT三维重建和计算机测量技术在下颌骨畸形整复中的临床应用(1)
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[摘要]目的：测量与下颌骨截骨线相关的的影像学指标，为手术提供解剖学依据。方法：对11例下颌骨畸形整复患者进行CT扫描得到颌面数据，利用计算机辅助设计相关软件重建三维模型，可以清晰地显示下颌骨畸形类型，进行整复前精确的诊断；并在三维模型上测量第一磨牙、第二磨牙至下颌骨下缘的垂直距离，第二磨牙至下颌角点的距离，根据差值标记截骨线，可以实现对下颌骨畸形的精确化修复。结果：利用CT三维重建技术得到的头颅三维模型进行术前设计可以提高手术的准确性，缩短手术时间，术后患者颌面外形均有不同程度改善，达到术前设计的预期效果。结论：CT三维重建与计算机测量技术对下颌骨畸形有重要的临床应用价值。
[关键字]CT三维重建；计算机测量；术前设计；下颌骨；畸形
[中图分类号]R782 [文献标识码]A [文章编号]1008-6455(2011)09-1386-03
3-Dimensional reconstruction and computer measurement of the clinical application in repair mandible deformities
WEN Hui-cai,YAO Yu-ting,FU Jian-hua,YANG Hong-hua,LIU Wen-jian,LIU Wei
(Department of Plastic Surgery,The First Affiliated Hospital of Nanchang University,Nanchang 330006,Jiangxi,China)
Abstract:Objective To provide the anatomicaI basis for the mandibular angle plasty by measuring the imaging index raletive to the mandibular osteotomy Iine.MethodsThe total of eleven patientswith mandible deformities were involved.The dada of maxillofacial obtained with CT scanning were reconstructed 3-dimention model by using the computer aid design combined with other relative softwares.Through 3-Dimention reconstruction,type of mandible malformation could be displayed clearly and preoperative diagnosis can be performed precisely.Meawhile，measuring the vertical distance between the first morlar and mandible inferior margin and the vertical distance between the second morlar and mandible inferior margin,the line from the second morlar to gonion.Marking the osteotomy line by the D-value,it can result in the well restoration of maxillofacial deformities.Results Base on 3-Dimention reconstruction technology, surgical design performed on the model will promote the accuracy of opration and decrease the operative precedure.Poseoperation the patiens had shown better appearances with satisfactory results. Conclusion3-Dimentionreconstruction thenology possesses highly clinical value in repair mandible deformities.
Key words:3-dimention reconstruction;computer measurement;surgical design;mandible;malformation
颌面畸形常由先天性疾病、外伤后引起的继发畸形等原因造成，不仅引起患者的功能障碍，而且导致毁容，严重影响患者的生活质量。颌面骨的畸形尤其下颌骨的发育不良是三维方向的，对其矫正需长、宽、厚的立体修复[1]，诊治过程比较困难。然而随着科学计算机技术及医学影像技术的发展并相互渗透，促使了CT三维重建技术在下颌骨畸形整复的应用。利用CT三维重建技术和计算机测量技术，可以实现对下颌骨畸形的精确测量，能更快更准确的解决下颌骨畸形修复对称性的难题 ......
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