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Quintessence Publishing: Journals: IJP
The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

Publication:
July/August 2003
Volume 16 , Issue 4

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Integration of Laser Surface Digitizing with CAD/CAM Techniques for Developing Facial Prostheses. Part 1: Design and Fabrication of Prosthesis Replicas

Chi-Mun Cheah, PhD/Chee-Kai Chua, PhD/Kwang-Hui Tan, BEng/Chung-Kiat Teo, BEng

Pages: 435–441
PMID: 12956501

Purpose: This article presents a novel manufacturing approach that integrates laser surface digitizing/scanning and computer-aided design (CAD) and manufacturing (CAM) to achieve automated fabrication of spatially and anatomically accurate extraoral facial prostheses. Materials and Methods: Topologic data of the patient’s face, including the site of deformity and the anatomy of a healthy “donor” organ, were acquired using laser surface digitizing. Two different CAD data manipulation techniques were developed to alleviate problems encountered in laser-digitized data sets. To reduce patient involvement, fitting of the prosthesis was conducted using a computer model of the patient’s face. Once finalized, rapid prototyping techniques were employed to fabricate a master pattern to cast the final prosthesis. Results: Three case studies involving different facial prostheses were conducted to evaluate the integrated manufacturing system. The results demonstrated the many advantages of the system for facial prosthesis production. Conclusion: With the new manufacturing approach, reduced patient discomfort, minimal dependence on the artistic skills of the prosthetist, and short turnaround times for prosthesis production can be expected. Int J Prosthodont 2003;16:435–441.

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