Non-cast titanium restorations in fixed prosthodontics
| Autor: | K.W. Boening, Reppel Pd, M.H. Walter |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Ceramics
Materials science Surface Properties Fixed prosthodontics chemistry.chemical_element Dentistry Bending In Vitro Techniques Electrochemistry Humans Ceramic Composite material Denture Design General Dentistry Titanium Dental Casting Technique biology Crowns business.industry Lasers Dental Bonding Conical surface biology.organism_classification Elasticity Dental Veneers chemistry Casting (metalworking) visual_art Metallurgy visual_art.visual_art_medium Occlusal surface Denture Partial Fixed Stress Mechanical Procera Dental Soldering business |
| Zdroj: | Journal of oral rehabilitation. 19(3) |
| ISSN: | 0305-182X |
| Popis: | The problems encountered in casting titanium in dentistry have not been completely resolved. The Procera system forms crowns by means of a combination of spark-erosion and milling. The accuracy of fit was examined before and after ceramic veneering both in vitro and in vivo. Before veneering, on conical surfaces space widths were approximately 53 microns in vitro and 69 microns in vivo. At shoulders and occlusal surfaces, spaces of about 430 microns were measured in vitro and of about 500 microns were measured in vivo. After ceramic veneering, slight increases in space widths could be observed. The metal-ceramic compound was tested by the 3-point bending test (DIN) and the bending test (ISO). The DIN test was satisfactory, but not the ISO test. It is concluded that titanium crowns processed by the Procera System are suitable for clinical usage, if the space widths at shoulders and the occlusal surface and the special requirements of tooth preparation are taken into account. |
| Databáze: | OpenAIRE |
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