Benazzi Stefano, Senck Sascha
Department of Anthropology, University of Vienna, Vienna, Austria.
J Oral Maxillofac Surg. 2011 Apr;69(4):1184-94. doi: 10.1016/j.joms.2010.02.028. Epub 2010 Jul 31.
In the present project, the virtual reconstruction of digital osteomized zygomatic bones was simulated using different methods.
A total of 15 skulls were scanned using computed tomography, and a virtual osteotomy of the left zygomatic bone was performed. Next, virtual reconstructions of the missing part using mirror imaging (with and without best fit registration) and thin plate spline interpolation functions were compared with the original left zygomatic bone.
In general, reconstructions using thin plate spline warping showed better results than the mirroring approaches. Nevertheless, when dealing with skulls characterized by a low degree of asymmetry, mirror imaging and subsequent registration can be considered a valid and easy solution for zygomatic bone reconstruction.
The mirroring tool is one of the possible alternatives in reconstruction, but it might not always be the optimal solution (ie, when the hemifaces are asymmetrical). In the present pilot study, we have verified that best fit registration of the mirrored unaffected hemiface and thin plate spline warping achieved better results in terms of fitting accuracy, overcoming the evident limits of the mirroring approach.
在本项目中，使用不同方法模拟数字化截骨颧骨的虚拟重建。
使用计算机断层扫描对15个颅骨进行扫描，并对左侧颧骨进行虚拟截骨。接下来，将使用镜像成像（有无最佳拟合配准）和薄板样条插值函数对缺失部分进行的虚拟重建与原始左侧颧骨进行比较。
总体而言，使用薄板样条变形进行的重建比镜像方法显示出更好的结果。然而，在处理不对称程度较低的颅骨时，镜像成像及后续配准可被视为颧骨重建的一种有效且简便的解决方案。
镜像工具是重建中可能的替代方法之一，但它不一定总是最佳解决方案（即当半侧面部不对称时）。在本初步研究中，我们已经证实，对镜像后的未受影响半侧面部进行最佳拟合配准和薄板样条变形在拟合精度方面取得了更好的结果，克服了镜像方法的明显局限性。
