Date of Award

Fall 1994

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)

Department

Dentistry

First Advisor

Ziebert, Gerald

Second Advisor

Waliszewski, Kenneth

Third Advisor

Dhuru, Virendra

Abstract

The successful fabrication of accurately fitting dental castings is an ongoing, technique sensitive process faced by clinical dentists, researchers, and dental laboratory technicians. Casting accuracy presents itself as a potential area of failure in the discipline of fixed prosthodontics, whether single or multi-unit castings are fabricated. It is also a great concern in the proper fabrication of large one-piece castings utilized for full arch implant supra-structures. It is important to thoroughly investigate the technique of producing large, multi-unit dental castings on a die system which closely resembles the positions of prepared natural teeth, ie., positioning the ideal dies in an arch form, so that measurements of accuracy can be made. This type of study will add information to the dental literature which is expected to help clinical dentists produce successful large multi-unit castings for fixed prosthodontics and implantology. It is important to note that since the rise of dental implants as a treatment modality for fully or partially edentulous individuals, the production of accurate implant suprastructures has been an area of great concern. It is believed that lack of proper fit of the implant supra-structures on the embedded fixtures might induce internal stresses in various components and the surrounding bony structure, causing a loss of osseointegration which is a primary requisite for successful implants. Utilization of a die system which facilitated production of multi-unit wax patterns and castings in a simulated arch form would significantly add to the body of knowledge regarding long span, multi-unit castings.

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