Du Fengzhou, Li Binghang, Yin Ningbei, Cao Yilin, Wang Yongqian
*Department of Cleft Lip and Palate †Digital Simulation Center ‡Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
J Craniofac Surg. 2017 Mar;28(2):383-386. doi: 10.1097/SCS.0000000000003301.
Knowing the volume of a graft is essential in repairing alveolar bone defects. This study investigates the 2 advanced preoperative volume measurement methods: three-dimensional (3D) printing and computer-aided engineering (CAE). Ten unilateral alveolar cleft patients were enrolled in this study. Their computed tomographic data were sent to 3D printing and CAE software. A simulated graft was used on the 3D-printed model, and the graft volume was measured by water displacement. The volume calculated by CAE software used mirror-reverses technique. The authors compared the actual volumes of the simulated grafts with the CAE software-derived volumes. The average volume of the simulated bone grafts by 3D-printed models was 1.52 mL, higher than the mean volume of 1.47 calculated by CAE software. The difference between the 2 volumes was from -0.18 to 0.42 mL. The paired Student t test showed no statistically significant difference between the volumes derived from the 2 methods. This study demonstrated that the mirror-reversed technique by CAE software is as accurate as the simulated operation on 3D-printed models in unilateral alveolar cleft patients. These findings further validate the use of 3D printing and CAE technique in alveolar defect repairing.
了解移植物的体积对于修复牙槽骨缺损至关重要。本研究调查了两种先进的术前体积测量方法：三维（3D）打印和计算机辅助工程（CAE）。本研究纳入了10名单侧牙槽裂患者。他们的计算机断层扫描数据被发送到3D打印和CAE软件中。在3D打印模型上使用模拟移植物，并通过排水法测量移植物体积。CAE软件计算的体积使用镜像反转技术。作者将模拟移植物的实际体积与CAE软件得出的体积进行了比较。3D打印模型模拟骨移植物的平均体积为1.52 mL，高于CAE软件计算的平均体积1.47 mL。这两个体积之间的差异为-0.18至0.42 mL。配对学生t检验显示两种方法得出的体积之间无统计学显著差异。本研究表明，在单侧牙槽裂患者中，CAE软件的镜像反转技术与3D打印模型上的模拟操作一样准确。这些发现进一步验证了3D打印和CAE技术在牙槽骨缺损修复中的应用。
