Chen Shuxiu, Liu Bing, Liu Jing, Yin Ningbei, Wang Yongqian
Center for Cleft Lip and Palate Treatment, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
J Craniofac Surg. 2020 Mar/Apr;31(2):412-415. doi: 10.1097/SCS.0000000000006011.
This study aimed to evaluate 2 advanced methods for presurgical calculation of bilateral alveolar cleft defect volume using 3-dimensional (3D) printing and computer-aided engineering (CAE) software. Twelve patients with bilateral alveolar cleft (4 females, 8 males, age range 8-11 years) were enrolled in the study. All patients underwent preoperative helical computed tomography scans, and the digital imaging and communications in medicine (DICOM) data of the computed tomography images were analyzed using 3D printing and CAE software. The 3D-printed model used a simulated graft, and graft volume was measured by water displacement. The CAE software used a subtractive method to calculate volume. Simulated graft volumes and CAE-software-derived volumes were compared using Pearson's correlation test and paired Student's t-test. The average volume of the simulated bone grafts obtained using 3D-printed models was 1.45 mL, which was lower than the CAE-software-derived mean volume of 1.52 mL. The mean calculation time using the 3D-printed model was 51.5 minutes, which was 32.1 minutes longer than the average 19.4 minutes when using CAE software. Paired Student's t-test revealed no statistically significant difference between the volumes derived from these methods. The results of this study further validated the use of 3D printing and CAE technique in bilateral alveolar defect repair. The CAE software is more cost-effective in presurgical volumetric assessment. Moreover, 3D models overcome limitations of 3D visualizations by providing tactile feedback and superior appreciation of visuospatial relationships among anatomical structures.
本研究旨在评估两种先进方法，即使用三维（3D）打印和计算机辅助工程（CAE）软件对双侧牙槽嵴裂缺损体积进行术前计算。12例双侧牙槽嵴裂患者（4例女性，8例男性，年龄范围8 - 11岁）纳入本研究。所有患者均接受术前螺旋计算机断层扫描，并使用3D打印和CAE软件分析计算机断层扫描图像的医学数字成像和通信（DICOM）数据。3D打印模型使用模拟移植物，通过排水法测量移植物体积。CAE软件使用减法计算体积。使用Pearson相关检验和配对学生t检验比较模拟移植物体积和CAE软件得出的体积。使用3D打印模型获得的模拟骨移植物平均体积为1.45 mL，低于CAE软件得出的平均体积1.52 mL。使用3D打印模型的平均计算时间为51.5分钟，比使用CAE软件时的平均19.4分钟长32.1分钟。配对学生t检验显示这些方法得出的体积之间无统计学显著差异。本研究结果进一步验证了3D打印和CAE技术在双侧牙槽嵴裂修复中的应用。CAE软件在术前体积评估中更具成本效益。此外，3D模型通过提供触觉反馈和对解剖结构之间视觉空间关系的更好理解克服了3D可视化的局限性。
