Operating Theatre, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai 200080, China.
Department of Thoracic Surgery, Shanghai First People's Hospital, Shanghai Jiao Tong University, No. 85 Wujin Road, Shanghai 200080, China.
Int J Surg. 2014;12(5):71-5. doi: 10.1016/j.ijsu.2013.10.006. Epub 2013 Oct 19.
To design and fabricate canine rib prosthesis with full geometric shape using computed tomography (CT) scan combined with computer-aided design (CAD) and stereo lithographic (SLA) technologies and to evaluate the accuracy of this method.
After scanned on 64 rows helical CT, the cortex part of the right 7th rib was selected as the prototype for design and manufacture of the rib prosthesis and image data were stored as DICOM format. Three-dimensional (3D) surface reconstruction was applied to produce 3D image of the 7th rib and results were outputted as STL format which were then modified by UG software for establishment of CAD model.
The rib prosthesis with full geometric shape was obtained based on CT scanning and SLA technique. About 30,000 point cloud data were acquired after 3D laser scan of the ribs. When comparing the rib prosthesis with the rib prototype, the maximum positive deviation, maximum negative deviation, average deviation and standard deviation were 1.764 mm, -2.126 mm, 0.183/-0.253 mm and 0.346 mm, respectively. There were about 88.17% of the point cloud data within the range of ±0.5 mm.
It is feasible to design and fabricate rib prosthesis with full geometric shape by using CT scanning technology combined with CAD and SLA technologies. This method is fast, convenient and precise for manufacturing prosthesis. Optimization and improvement could be processed based on the deviation suggested by the scanning.
使用计算机断层扫描（CT）结合计算机辅助设计（CAD）和立体光刻（SLA）技术设计并制作具有完整几何形状的犬肋骨假体，并评估该方法的准确性。
对 64 排螺旋 CT 扫描后的右侧第 7 肋骨皮质部分进行选择，作为肋骨假体设计和制造的原型，并将图像数据存储为 DICOM 格式。应用三维（3D）表面重建生成第 7 肋骨的 3D 图像，并将结果输出为 STL 格式，然后通过 UG 软件进行修改，建立 CAD 模型。
基于 CT 扫描和 SLA 技术获得了具有完整几何形状的肋骨假体。对肋骨进行 3D 激光扫描后，获得了约 30,000 个点云数据。将肋骨假体与肋骨原型进行比较，最大正偏差、最大负偏差、平均偏差和标准偏差分别为 1.764mm、-2.126mm、0.183/-0.253mm 和 0.346mm。约有 88.17%的点云数据在±0.5mm 的范围内。
使用 CT 扫描技术结合 CAD 和 SLA 技术设计和制作具有完整几何形状的肋骨假体是可行的。该方法制造假体快速、方便、精确。可根据扫描建议的偏差进行优化和改进。
