This study is aimed to evaluate the effect of staining solutions on the color stability of bulk fill and conventional nanohybrid resin composites (RCs) when subjected to various immersion periods.

A total of 120 cylindrical Teflon molds (4 × 4 mm) were obtained and divided into four groups of 30 each. Molds of groups I and II were filled with Tetric N Ceram Bulk Fill (Ivoclar Vivadent, Schaan, Liechtenstein) and Filtek Bulk Fill (3M ESPE, St. Paul, MN, USA). Molds of groups III and IV were filled with Tetric N Ceram (Ivoclar Vivadent) and Filtek Z250 XTE (3M ESPE) incremental fill RC. Photo-activation was performed and specimens were incubated. Spectrophotometer analysis was done according to Commission Internationale d'Eclairage Lab color scale. After taking the baseline measurements, 10 samples from each group were immersed in distilled water (control, subgroup a), tea (subgroup b), and coffee (subgroup c) respectively, for 1, 7, and 30 days. The color values of each specimen were remeasured and color change value (E*ab) was calculated after 1, 7, and 30 days. Data were analyzed by Friedman's test and Mann–Whitney U-test; p < 0.05 is considered to be statistically significant.

Group III specimens showed perceptible color changes at 30-day immersion period in coffee and tea. In group I specimens, color changes were perceptible at 7- and 30-day immersion periods in coffee and only 30-day immersion period in tea. Groups II and IV specimens showed perceptible color changes after all immersion periods in coffee and after 30 days in tea.

It can be concluded that Tetric N Ceram has less color change than the other nanohybrid RCs investigated when immersed in coffee and tea after various immersion periods.

Thumu J, Kadiyala A, Bollu IP, Ballullaya SV, Devalla S. Effect of Staining Solutions on the Color Stability of Conventional and Bulk Fill Nanohybrid Resin Composites: A Spectrophotometric Analysis. J Oper Dent Endod 2017;2(1):1-5.

White spot lesion is the early sign of demineralization occurring under intact enamel which may lead to the development of caries.

The aim of this study is to compare and evaluate the caries-preventive efficacy of a resin infiltrant, casein phosphopeptideamorphous calcium phosphate (CPP-ACP), and nanohydroxyapatite (nano-HA) on white spot enamel lesions.

A total of 40 freshly extracted human maxillary incisors were used in this study. Enamel samples (2 mm thickness) were prepared and sample preparation windows were created (dimension of 5 × 5 mm) using adhesive tape, and the sample was made completely resistant to acid attack by coating nail varnish.

The samples were divided into four groups, which are resin infiltrant, CPP-ACP, nano-HA, and control of 10 enamel samples in each group. The samples were evaluated using confocal laser scanning microscopy before and after the application of resin infiltrant and remineralizing agents.

Statistical analysis was done using analysis of variance and post hoc Bonferroni test was used for comparing intragroups and Tukey test for comparing intergroups.

The mean value after demineralization is 245, 246, 250, and 247 μm for Groups I to IV. After remineralization, group I > group II > group III > group IV. After acid challenge for a period of 14 days, group I > group II > group III > group IV.

The resin infiltrant showed higher caries inhibition potential and superior acid resistance than CPP-ACP and nano-HA.

The inhibition of caries progression by resin infiltration technique should be considered as an alternative approach to the more invasive therapies and warrants a place in the range of minimally invasive dentistry techniques.

Arvindkumar A, Maheswari U, Kingston C, Gnanaseelan R, Jonathan Emil Sam R. Caries-preventive Efficacy of Resin Infiltrant, Casein Phosphopeptide-amorphous Calcium Phosphate, and Nanohydroxyapatite using Confocal Scanning Electron Microscope: An in vitro Study. J Oper Dent Endod 2017;2(1):6-10.

Murugesan S, Rajasekaran M, Baskaran VA, Gopal SN, Indra R, Ramachandran S. Scanning Electron Microscope Evaluation of Smear Layer Removal at the Coronal, Middle, and Apical Third of Root Canals using Er,Cr:YSGG Laser: An in vitro Study. J Oper Dent Endod 2017;2(1):11-14.

The aim of the present study is to evaluate the influence of socioeconomic status and social habits on the prevalence of dental caries in Chennai population. Cross sectional study was conducted in 500 patients by survey method using a questionnaire. Data was collected based on demographic details, information on the income, educational qualification, occupation, social habits (tobacco and alcohol consumption) and the caries exposure in terms of presence or absence of dental caries or a restoration. The data was tabulated using Microsoft Excel and statistically analysed using SPSS version 22. 91.8% of subjects in the lower socio economic status have a caries exposure while only 82% and 73.4% of the medium and higher economic status had caries. Within the limitations of the present study it can be concluded that there exists a connection between the individuals' socio economic condition and the oral health status that calls for implementation of oral health programs.

Baskaran VA, Shankarnarayan G, Rajasekaran M, Rashmi, Poorni S, Srinivasan MR. Influence of Socioeconomic Status on Caries Prevalence in Chennai Population: A Cross-sectional Study. J Oper Dent Endod 2017;2(1):15-18.

Sawant PH, Vimala N, Padhye L. “Let's go Green to get Our Globe Clean”: Green Dentistry. J Oper Dent Endod 2017;2(1):19-24.

PradeepKumar AR, Subbiya A. Cracks and Fractures in Teeth. J Oper Dent Endod 2017;2(1):25-30.

Karanath SAK, Geeta IB, James JM. Management of Internal Resorption: A Catch-22 Situation. J Oper Dent Endod 2017;2(1):31-35.

The incidence of second distobuccal canal ranges from 1.64 to 9.5%. However, the incidence of third distal canal (distopalatal) is rare (<1%). This report highlights the importance of computed tomography in the successful diagnosis and management of maxillary first molar.

Madan N, Gwalani H, Raisingani D, Prasad A, Srivastava H. Management of Maxillary First Molar with Six Canals using Cone Beam Computed Tomography. J Oper Dent Endod 2017;2(1):36-39.

Srinivasan MR, Nishanthine C. Endodontic Surgery: Is it an Obsolete Clinical Procedure? J Oper Dent Endod 2017;2(1):40-44.

Pant M, Raisingani D, Madan N, Khurana D, Srivastava H, Somani N. Veneer Crafting: The Smile Makeover. J Oper Dent Endod 2017;2(1):45-49.