A Preliminary Application on the Manufacture of Clinical Removable Partial Denture Framework Using CAD/CAM
|School||Nanjing Medical University|
|Keywords||Dentition defect Removable partial dentures Rapid Prototyping Casting frame Computer-aided design Computer-aided production|
Computer-aided design (computer aided design, CAD) and computer-aided production (computer aided manufacture, CAM) technology referred to as CAD / CAM, has been widely used in many fields such as industrial production, construction, design, quality characteristics of the object. 1985 French scientists Duret first successful computer-aided design and production (computer aided design and computer aided manufacture, CAD / CAM) technology used in the oral cavity field, after 20 years of development, has been fixed partial denture oral clinical aspects the successful development of a variety of CAD / CAM systems, and has been widely used in clinical practice. The advent of very flexible, removable partial dentures complexity, many different types of removable partial denture design dentition defect not yet mature removable partial denture CAD / CAM system for removable partial denture frameworks CAD Research relatively large for less CAM research. Domestic scholars to carry out related research, but only laboratory studies have not yet entered clinical trials. In this study, used in the CAD / CAM technology initial removable partial dentures clinical, to investigate the computer-aided design and fabrication of removable partial denture frameworks on clinical patients with dentition defect model for further development may be applicable to the oral clinical the partial denture CAD / CAM technology to lay the foundation. The first part of the clinical dentition defects in patients with edentulous model three-dimensional data acquisition and processing materials and methods: clinical removable partial dentures Kennedy Ⅰ maxillary dentition defect patients one case, the patient's dentition defect model, their bite match on the jaw model, the three-dimensional raster scanner to obtain three-dimensional data. Results: digitized dental model with good bite matching relations could be all arbitrary rotation, zoom in, zoom out. Conclusion: The patients with dentition defect digitized dental model laid the foundation for the computer-aided design of removable partial dentures. Computer-aided design of materials and methods in the second part of the dentition defect patients with removable partial denture mold casting frame: maxillary dentition defects in patients with edentulous three-dimensional digital model, the use of three-dimensional design software Catia, Geomagic, RapdiForm removable the various components of the partial denture frameworks, including the clasp, cleft palate, and to strengthen the network, connection, such as a three-dimensional digital modeling and connection combined into a three-dimensional model of the casting frame. Results: digitized dental model the use of general-purpose engineering software model completely seal the removable partial denture casting frame three-dimensional digital model. All rotate, zoom in and out. Conclusion: dentition defects in patients with a clinical removable partial denture the casting frame 3D modeling method for removable partial denture casting frame 3-D design software and computer-aided manufacturing and lay the foundation. Computer-aided production research, and the third part of the dentition defect in patients with removable partial denture mold casting frame bracket tried on materials and methods: Clinical will be saved as STL format the scaffolds entity data model import SLA rapid prototyping equipment for laser rapid prototyping production. Conventional embedded in the epoxy bracket mold casting a cobalt-chromium alloy stent. The results: the application of rapid prototyping technology to complete the epoxy resin removable partial denture frameworks mold, smooth surface and has a certain amount of strength and hardness. Strip casting cobalt chromium alloy stent successfully in place in the patient's mouth and oral tissues of tight retention stability. Conclusion: dentition defects in patients with a clinical partial denture casting frame to produce a new method for computer-aided manufacturing removable partial denture casting frame lay the foundation for clinical application.