The anchorage of dental prostheses to endosseous implants is a well defined procedure in clinical practice, allowing the restoration of the masticatory function, eliminating pain and providing esthetics. Traditional methods for the creation of implant surfaces are greatly dependent on experiences and skills of clinicians. In the last few years, the development of CAD/CAM technologies has been extended to the design of custom prosthetic frameworks. The weak point of the whole procedure is the accuracy in the determination of implant supporting positions and consequent prosthetic fit to these surfaces. This paper concerns the study of an innovative methodology to obtain dental prostheses starting from endosseous implants. The method is based on optical scanning gypsum replicas in different times within the design phase of dental frameworks. A structured light scanning device has been developed to automatically capture 3D data relative to positions and orientations of endosseous implants in master models. Since inaccuracies in the measurement of dental cast models can seriously compromise the final clinical results, a proper test method for the precision of the dental scanner has been proposed and described.
File in questo prodotto:
Non ci sono file associati a questo prodotto.