Abshact. Our experience with the treatment of 450 cleft lip and palate patients who were operated late in life is presented. Preoperative findings as to facial growth, dental occlusion, hearing, and ear disease are discussed. Final results are analysed.The type of fissure according to the accepted embryological classification (Kernahan & Stark, 1958) is presented in Table 11. Scand J Plast ReconstrSurg 8 Scand J Plast Surg Recontr Surg Hand Surg Downloaded from informahealthcare.com by Nyu Medical Center on 06/29/15 For personal use only. 8 -742913 Scand J Plast Reconstr Surg 8 Scand J Plast Surg Recontr Surg Hand Surg Downloaded from informahealthcare.com by Nyu Medical Center on 06/29/15 For personal use only.

Summary:Rapid prototyping models (RPMs) had been extensively used in craniofacial and maxillofacial surgery, especially in areas such as orthognathic surgery, posttraumatic or oncological reconstructions, and implantology. Economic limitations are higher in developing countries such as Mexico, where resources dedicated to health care are limited, therefore limiting the use of RPM to few selected centers. This article aims to determine the dimensional error of a low-cost fused deposition modeling 3D printer (Tronxy P802MA, Shenzhen, Tronxy Technology Co), with Open source software. An ordinary dry human mandible was scanned with a computed tomography device. The data were processed with open software to build a rapid prototype with a fused deposition machine. Linear measurements were performed to find the mean absolute and relative difference. The mean absolute and relative difference was 0.65 mm and 1.96%, respectively (P = 0.96). Low-cost FDM machines and Open Source Software are excellent options to manufacture RPM, with the benefit of low cost and a similar relative error than other more expensive technologies.

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