phosphorus-radioisotopes and Dental-Leakage

The extent of marginal leakage in class V composite resin restorations cured by visible light and argon laser was observed, in vitro, using 32 extracted primary and permanent anterior teeth, free of caries and any observable fracture lines. Marginal leakage was observed by both 2% methylene blue dye and phosphorous (P32) isotope methods and their efficacy was also assessed. There was a statistically higher degree of marginal leakage in restorations cured by argon laser as compared to visible light by dye method whereas it was not of statistical significance by isotope method. Irrespective of the type of curing and method of observation, primary teeth showed higher degree of marginal leakage. Additionally cervical margin of all the restorations in both primary and permanent teeth showed higher degree of marginal leakage to that of incisal margin by both curing systems and methods used. The dye method was observed to be superior to isotope method towards assessing the extend of marginal leakage.

Topics: Chi-Square Distribution; Coloring Agents; Composite Resins; Dental Leakage; Dental Marginal Adaptation; Dental Restoration, Permanent; Humans; Lasers; Light; Methylene Blue; Phosphorus Radioisotopes; Random Allocation; Statistics, Nonparametric; Tooth, Deciduous