CLINICAL-VALUE OF COMPUTER-GENERATED ACRYLIC SKULL REPLICAS PRODUCED BY LASER LITHOGRAPHY

To determine for what deformity and utility the computer-generated acr ylic (CGA) skull replica has the greatest value, we analyzed retrospec tively a consecutive series of patients with craniomaxillofacial defor mities (N = 54) whose treatment involved the utilization of CGA skull replicas. Application of the CGA skull replica was divided retrospecti vely into four groups: (1) use as an aid for preoperative analysis of osseous deformity, (2) use as material for preoperative surgical simul ation, (3) use as a navigational aid during an operation, and (4) use as a negative template. Based on the aspects of these utilizations, we evaluated for what deformity the CGA skull replica was useful. Analys is of the data led us to conclude the following. First, the CGA skull replica is a valuable tool in craniomaxillofacial surgery, especially for patients with asymmetrical deformities and delicate convexities an d concavities of the skull surface. Second, the largest function that CGA skull replicas can satisfy is standardization of craniomaxillofaci al surgery. In carrying out preoperative surgical simulation utilizing a replica, drawing osteotomy lines on it, sterilizing it, and then br inging it to the operating table for consultation whenever required du ring an operation, we are able to proceed with greater precision and s peed than if it was not available.