Deffects in Dental Alloys Cast Single Tooth Restorations
نویسندگان
چکیده
Casting failures of alloys in dental technology should be the exception, not the rule. They have to be detected in time and associated with possible causes. For the experimental part base metal alloys single tooth restorations were achieved using the conventional lost wax process for casting in order to be evaluated. Some casting defects obtained during the experimental part are exemplified: incomplete castings, absence of the castings, voids, distorsions, nodules, porosities. Selecting the appropriate casting techniques for each alloy and dental restoration and accurate following of the technologycal steps are essential to avoid casting defects.
منابع مشابه
Adaptation Accuracy of Cast Metallic Single Tooth Restorations
Achieving metallic frameworks of single tooth restorations involves obtaining high precision parts. Adaptation accuracy is one of the main factors that influence single tooth restorations long-term reliability. The purpose of the study was to test innovative methods for adaptation accuracy evaluation of different single tooth cast restorations. Acrylic teeth were prepared for single tooth cast ...
متن کاملCaptekTM - A new capillary casting technology for ceramometal restorations
CaptekTM (capillary technology) is an advanced metallurgic system that was developed to combine optimal natural esthetics of dental porcelain with the strength of ceramometal , to produce accurate restorations on all types of tooth preparation and provide a biocompatible environment for the oral tissues in simple and affordable procedures. CaptekTM restorations include inlays, onlays, crowns, a...
متن کاملBond strength and marginal closure of newly developed adhesive cements.
Since luting cement is used for fixing cast restorations to their abutments, the cement surface at the junction between cast and tooth is exposed to oral environment. The conventional cement so far used does not adhere to the tooth and is slightly soluble into saliva and gingival fluid1,2). Consequently, the microleakage and subsequent recurrent caries seem to develop at this junction. Recently...
متن کاملMarginal and internal adaptation of commercially pure titanium and titanium-aluminum-vanadium alloy cast restorations.
AIM The purpose of this in vitro study was to investigate the marginal accuracy and internal fit of complete cast crowns and three-unit fixed partial dentures (FPDs) cast with commercially pure titanium (CPTi) and Titanium-Aluminum-Vanadium alloy (Ti-6Al-4V). METHODS AND MATERIALS CPTi and Ti-6Al-4V alloy were used to cast twelve single crowns and twelve three-unit FPDs. A traveling microscop...
متن کاملStress distribution in porcelain-fused-to-gold crowns and preparations constructed with photoelastic plastics.
Extensive restorations of single anterior teeth are accomplished by using porcelain jacket crowns or porcelain enamel or plastic veneer restorations supported by an alloy restoration that is luted to the tooth. The porcelain jacket crown has the advantage that less tooth tissue must be removed, but the material is brittle and lacks impact strength. Studies by McLean",2 have shown that these res...
متن کامل