ABSTRACT
<p><b>OBJECTIVE</b>To investigate the application of computer aided design-computer aided manufacture (CAD-CAM) technique in the reconstruction of mandible defect with individual titanium prosthesis.</p><p><b>METHODS</b>Six patients with large mandibular ramus and angle tumor were spiral CT scanned preoperatively, and the CAD-CAM was used to design and make individual titanium prosthesis for reconstructing the mandibular defects after resection of the tumor. The prosthesis were assembled during operation. Postoperative follow-up period was 9 - 38 months.</p><p><b>RESULTS</b>The design and manufacture of titanium prosthesis by use of CAD-CAM technique was convenient and the prosthesis fitted the defects very well. The outline of the face, the occlusion and function were restored. After 9 - 38 months of follow-up, the mandibular symmetry was good.</p><p><b>CONCLUSIONS</b>The application of CAD-CAM provided accurate simulation and fast manufacturing process for the titanium prosthesis in the repair of mandibular defect.</p>
Subject(s)
Adult , Female , Humans , Male , Middle Aged , Young Adult , Ameloblastoma , Rehabilitation , General Surgery , Computer Simulation , Computer-Aided Design , Follow-Up Studies , Mandible , General Surgery , Mandibular Neoplasms , Rehabilitation , General Surgery , Mandibular Prosthesis Implantation , Mandibular Reconstruction , Prosthesis Design , Titanium , Tomography, Spiral ComputedABSTRACT
<p><b>OBJECTIVE</b>To evaluate the effect of distraction osteogenesis for severe micrognathia by comparing the pre- and post-operative profile and mentolabial relationship.</p><p><b>METHODS</b>16 cases underwent temporal-mandibular joint plasty and temporal fasciomuscular flap transfer. The mandibular distraction began at the 5th postoperative day at a rate of 0.8 mm a day, two times a day. Bony and soft tissue cephalometry were performed before and after operation. T-test was used to study the change after distraction osteogenesis.</p><p><b>RESULTS</b>There were significant differences in facial convexity, lower facial height, lower lip length, inter-labial distance, the ratio of lip to mental, the distance from lip to esthetic plane, the depth of mentolabial crease and the thickness of mental soft tissue.</p><p><b>CONCLUSIONS</b>Mandibular distraction osteogenesis can markedly improve the soft tissue profile of the middle and lower face for severe micrognathia.</p>