Mueller A A, Paysan P, Schumacher R, Zeilhofer H-F, Berg-Boerner B-I, Maurer J, Vetter T, Schkommodau E, Juergens P, Schwenzer-Zimmerer K
Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Switzerland.
Br J Oral Maxillofac Surg. 2011 Dec;49(8):e67-71. doi: 10.1016/j.bjoms.2011.02.007. Epub 2011 Mar 31.
Mirroring of missing facial parts and rapid prototyping of templates have become widely used in the manufacture of prostheses. However, mirroring is not applicable for central facial defects, and the manufacture of a template still requires labour-intensive transformation into the final facial prosthesis. We have explored innovative techniques to meet these remaining challenges. We used a morphable model of a face for the reconstruction of missing facial parts that did not have mirror images, and skin-coloured polyamide laser sintering for direct manufacture of the prosthesis. From the knowledge gleaned from a data set of 200 coloured, three-dimensional scans, we generated a missing nose that was statistically compatible with the remaining parts of the patient's face. The planned prosthesis was manufactured directly from biocompatible skin-coloured polyamide powder by selective laser sintering, and the prosthesis planning system produced a normal-looking reconstruction. The polyamide will need adjustable colouring, and we must be able to combine it with a self-curing resin to fulfil the requirements of realistic permanent use.
面部缺失部分的镜像处理和模板的快速成型已在假体制造中广泛应用。然而，镜像处理不适用于面部中央缺损，且模板的制造仍需要大量人力将其转化为最终的面部假体。我们探索了创新技术来应对这些尚存的挑战。我们使用面部可变形模型来重建没有镜像的面部缺失部分，并采用肤色聚酰胺激光烧结技术直接制造假体。从200份彩色三维扫描数据集所获知识中，我们生成了一个在统计学上与患者面部其余部分相符的缺失鼻子。计划中的假体通过选择性激光烧结直接由生物相容性肤色聚酰胺粉末制造而成，假体规划系统生成了外观正常的重建效果。聚酰胺需要可调节的着色，并且我们必须能够将其与自固化树脂结合以满足逼真的长期使用要求。
