Yu Quan, Gong Xin, Wang Guo-Min, Yu Zhe-Yuan, Qian Yu-Fen, Shen Gang
Department of Orthodontics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, PR China.
J Craniofac Surg. 2011 Jan;22(1):142-6. doi: 10.1097/SCS.0b013e3181f6f9ae.
To establish a new method of presurgical nasoalveolar molding (NAM) using computer-aided reverse engineering and rapid prototyping technique in infants with unilateral cleft lip and palate (UCLP).
Five infants (2 males and 3 females with mean age of 1.2 w) with complete UCLP were recruited. All patients were subjected to NAM before the cleft lip repair. The upper denture casts were recorded using a three-dimensional laser scanner within 2 weeks after birth in UCLP infants. A digital model was constructed and analyzed to simulate the NAM procedure with reverse engineering software. The digital geometrical data were exported to print the solid model with rapid prototyping system. The whole set of appliances was fabricated based on these solid models.
Laser scanning and digital model construction simplified the NAM procedure and estimated the treatment objective. The appliances were fabricated based on the rapid prototyping technique, and for each patient, the complete set of appliances could be obtained at one time. By the end of presurgical NAM treatment, the cleft was narrowed, and the malformation of nasoalveolar segments was aligned normally.
We have developed a novel technique of presurgical NAM based on a computer-aided design. The accurate digital denture model of UCLP infants could be obtained with laser scanning. The treatment design and appliance fabrication could be simplified with a computer-aided reverse engineering and rapid prototyping technique.
利用计算机辅助逆向工程和快速成型技术，建立一种针对单侧唇腭裂（UCLP）婴儿的术前鼻牙槽塑形（NAM）新方法。
招募5例完全性UCLP婴儿（男2例，女3例，平均年龄1.2周）。所有患者在唇裂修复术前均接受NAM治疗。UCLP婴儿出生后2周内，使用三维激光扫描仪记录上颌义齿模型。构建数字模型并使用逆向工程软件进行分析，以模拟NAM过程。将数字几何数据导出，用快速成型系统打印实体模型。基于这些实体模型制作整套矫治器。
激光扫描和数字模型构建简化了NAM过程并预估了治疗目标。矫治器基于快速成型技术制作，每位患者均可一次性获得整套矫治器。术前NAM治疗结束时，裂隙变窄，鼻牙槽段畸形恢复正常排列。
我们开发了一种基于计算机辅助设计的术前NAM新技术。通过激光扫描可获得UCLP婴儿精确的数字义齿模型。利用计算机辅助逆向工程和快速成型技术可简化治疗设计和矫治器制作。
