Aim and Objectives:To evaluate the elution of bisphenol A-glycidyl methacrylate (BisGMA) and triethylene glycol dimethacrylate (TEGDMA) from two bulk-fill composites at different polymerization times, for different storage periods when cured with quartz-tungsten-halogen (QTH) curing unit.Materials and Methods:Tetric N-Ceram bulk fill and EverX Posterior were analyzed using high-performance liquid chromatography unit. Totally, 68 samples were prepared, two groups (n = 17) from both the composites, one for each tested polymerization time. Each sample was cured with a QTH curing unit, using soft-start curing technique and stored in 2 ml of ethanol for 24 h. Storage medium was renewed and then stored again for 1 week. Data acquired were statistically analyzed.Results:The elution of BisGMA was significantly higher from Tetric N-Ceram bulk fill and BisGMA and TEGDMA from EverX Posterior composite at the end of 24 h, irrespective of the curing time. In EverX Posterior, a higher amount of TEGDMA was eluted at the end of 24 h, while at the end of 1 week, significantly higher amount of BisGMA was released.Conclusion:A significant amount of the release of BisGMA as well as TEGDMA was seen from both the composites when stored for different time intervals.

Aim:The aim of the study is to determine the prevalence of permanent anterior teeth fracture due to trauma in South Indian population. Materials and Methods: After formal consent, study was conducted on 2000 patients reporting for treatment in A B Shetty Memorial Institute of Dental Sciences and Rural Satellite Centers from June to December 2013. They were examined under good illumination using sterilized mouth mirror, explorer and cotton rolls. Results were evaluated using Pearson Chi-square test. Results: Of 2000 patients, overall prevalence of anterior teeth fracture due to trauma was 14.85%, 53.9% cases were noticed in the age group of 15-30 years, 20.2% cases in an age group of 12-15 years. Of 14.85% (297) cases, 53.9% males and 46.1% females had anterior teeth fracture, 88.67% cases were with respect to maxillary arch and 11.33% cases were with respect to mandibular arch. 43.9% patients had enamel and dentin fracture, only enamel fracture was seen in 31.6% patients and the least was 6.01% which showed displacement of tooth without crown or root fracture, 67% were because of falls and rest of the 33% of patients had anterior tooth fracture because of violence, sports and traffic accidents, 71.42% cases had fracture with maxillary central incisor. Furthermore, 59.6% cases were seen with Class II Division I malocclusion. Conclusions: In the present study we noticed that fall was the most frequent cause and are seen more in males with an increased prevalence in 15-30 years of age. Furthermore, fracture of maxillary central incisor was most common and among all, fractures involving enamel and dentin were most common.

AimThe aim of this study is to evaluate the protective effect of the salivary proteins on the demineralization of enamel.Materials and methodsTwenty freshly extracted human molar teeth were used in this study. Enamel samples (2 mm thickness) were prepared from the buccal and lingual surfaces of the teeth selected. An acid-resistant nail varnish was used to cover every aspect of the sample, except an area of 5 * 5 mm limited by an adhesive tape. After drying, the adhesive tape was removed, exhibiting a rectangular area on the enamel surface. Samples were divided into two groups: Group I (10 samples): Each sample was coated by 100 μg of albumin for 2 hours at 37°C. Group II (10samples): Each sample was exposed to 100 μL of deionized water.Samples were washed by dipping once in deionized water. They were then disposed into individual tubes containing demineralization solution for 1, 2, 3, and 4 minutes at 37°C with gentle agitation. The demineralization solution was utilized to determine the calcium loss from specimens at 1, 2, 3, 4 minutes using an ultraviolet-visible spectrophotometer.ResultsCalcium loss was less from the albumin-coated samples than control group at all times and was statistically significant (p < 0.05). Also, calcium loss was maximum at the end of 1 minute, and it decreased as time interval increased and was statistically significant (p < 0.001).ConclusionAlbumin has provided a strong protection against enamel demineralization at all times compared to the one without it.How to cite this articleHegde MN, Sajnani AR. Salivary Proteins—A Barrier on Enamel Demineralization: An in vitro Study. Int J Clin Pediatr Dent 2017;10(1):10-13.