Dental Technology Techniques for Fixed Prosthodontics

At the end of this course, students should be able to: 1. describe and evaluate work process and the quality of finished prostheses; 2. analyses and critic the fabricated prostheses; 3. describe the laboratory stages of fabricating fixed prostheses; 4. describe the materials and instruments needed for making fixed prostheses; 5. interpret prescription from the dentist for the fabrication of fixed prostheses; and 6. fabricate all fixed prostheses in the laboratory.

Principles of ‘lost wax’ process in metal casting, preparation for partial dentures – spring, investment, burn-out, casting, sandblasting, timing polishing and finishing concerning metal works. Principles of metal melting in Dental Technology practice. Welding and soldering techniques. Description of spot welding and soldering equipment and hand tools. Casting technology – direct and indirect methods of investment, preparation of master model, sprueing principles, investing, methods of melting metal, casting force, pickling, polishing and finishing. Defects in casting – oxidation, back pressure, sprue falling, incomplete casting, Porosity, surface pitting, cooling shrinkage, occluded gases and many others.