objectives: dental composite wear in posterior restorations is a concern and is affected by different factors. this study was conducted to evaluate the effect of polishing and mechanical loads on wear of silorane-based and methyl methacrylate-based composites resins. materials and methods: of each dental composite (filtek p90 and filtek p60), 40 samples were fabricated in a polyethylene mold (4...

introduction: this in vitro study evaluated the influence of composite thickness (with or without fiber reinforcement) on fracture resistance of direct restorations in endodontically treated teeth. methods and materials: fifty-six intact human premolars were chosen and randomly divided into four groups ( n =14). after preparation of a mesio-occluso-distal (mod) cavities and cusp reduction, the ...

For many years, amalgam was the preferred repair material; however, because of worries about aesthetics, mercury toxicity, and development lichenoid diseases, its use has decreased. The oral mucosa a reaction known as lesion (OLL). Dental materials, particularly amalgam, medications, graft-versus-host disease (GVHD), are among backgrounds OLL. When restorative most frequently come into close to...

conclusions the most common cause of restoration replacement in patients referred to the babol university of dentistry during years 2013 and 2014 was secondary caries that were found in class ii restorations. patients and methods age, sex, type of occlusion, dmf, existing parafunction, type of tooth, class and reason of composite restoration replacement was recorded for patients who had referre...

Many new technologies with potential application to dentistry are on the horizon, including tissue engineering, gene and growth factor therapy, although there are a number of problems to overcome1 before these might be introduced clinically. However, the dentine-pulp complex has strong natural regenerative capacity and exploitation of these biological repair processes can allow current approach...

Dental caries is a chronic infectious disease resulting from the penetration of oral bacteria into the enamel and dentin. Microorganisms subsequently trigger inflammatory responses in the dental pulp. These events can lead to pulp healing if the infection is not too severe following the removal of diseased enamel and dentin tissues and clinical restoration of the tooth. However, chronic inflamm...

mercury is among the most toxic nonradioactive elements which may cause toxicity even at low doses. some studies showed release of mercury from dental amalgam fillings in individuals who used mobile phone. this study was conducted to assess the effect of high-field mri on mercury release from dental amalgam filling. we studied two groups of students with identical tooth decays requiring a simil...

statement of the problem in recent years, amalgam has been considered a danger for dentistry personnel due to toxicity of mercury (hg) purpose this study aimed at investigating the relationship between scientific indices and dentists’ urine hg level through measuring its concentration rate among dentists with over four years of experience materials and methods thirty dentists with over four yea...

objective: selection of an appropriate shade of composite is critical in achieving an esthetic restoration. different systems are used to assess and describe color parameters. this study aimed to assess the effect of color and thickness of filtek supreme (fs) and premise (p) composite resins on correction of tooth discoloration.   methods: in this in vitro experimental study, 10 anterior teeth ...

With conventional fixed dental prostheses, the interim restoration is a valuable diagnostic tool in the evaluation of esthetics and function. To achieve predictable definitive esthetic results, information about the subgingival and the supragingival contour of a properly designed restoration should be communicated to the dental laboratory technician. The technique described enables the accurate...