Doerfler Hans-Martin, Huempfner-Hierl Heike, Kruber Daniel, Schulze Peter, Hierl Thomas
Engineer, Department of Oral and Maxillofacial Plastic Surgery, Leipzig University and University of Applied Sciences (HTWK), Leipzig, Germany.
Senior Consultant, Department of Oral and Maxillofacial Plastic Surgery, Leipzig University, Leipzig, Germany.
J Oral Maxillofac Surg. 2017 Jul;75(7):1475.e1-1475.e8. doi: 10.1016/j.joms.2017.03.048. Epub 2017 Apr 4.
Aim of this study was to investigate whether a mold generated from a statistical shape model of the orbit could be generated to provide a cost-efficient means for the treatment of orbital fractures.
A statistical shape model was created from 131 computed tomographic (CT) scans of unaffected adult middle European human orbits. To generate the model, CT scans were segmented in Brainlab software, preregistered using anatomic landmarks, trimmed to an identical size, and definitely registered. Then, the model was created using the global master algorithm. Based on this model, a mold consisting of a male part and a female part was constructed and printed using a rapid prototyping technique.
A statistical shape model of the human orbit was generated from 125 CT scans. Six scans (4.5%) presented major anatomic deviations and were discarded. A solid mold based on this model was printed. Using this mold, flat titanium mesh could be successfully deformed to serve as an orbital implant.
A mold based on the statistical orbital shape could serve as a cost-effective means for the treatment of orbital fractures. It allows the anatomic preformation of titanium or resorbable implant material for orbital reconstruction. Because these materials could be cut from larger sheets, the use of a mold would be a cost-effective treatment alternative.
本研究旨在探讨能否根据眼眶的统计形状模型生成模具，为眼眶骨折的治疗提供一种经济高效的方法。
从131例未受影响的成年中欧人眼眶的计算机断层扫描（CT）图像中创建统计形状模型。为生成该模型，在Brainlab软件中对CT扫描图像进行分割，利用解剖标志进行预配准，裁剪为相同大小并最终配准。然后，使用全局主算法创建模型。基于该模型，使用快速成型技术构建并打印了一个由阳模和阴模组成的模具。
从125例CT扫描图像中生成了人类眼眶的统计形状模型。6例扫描图像（4.5%）存在严重解剖变异，被剔除。基于该模型打印出了一个实体模具。使用该模具，可成功将扁平钛网变形以用作眼眶植入物。
基于眼眶统计形状的模具可作为治疗眼眶骨折的一种经济有效的方法。它能够对用于眼眶重建的钛或可吸收植入材料进行解剖预成型。由于这些材料可从较大板材上切割下来，使用模具将是一种经济有效的治疗选择。
