ABSTRACT
In the modern civilized, cosmetically conscious world, well-contoured and well-aligned white teeth set the standard for beauty. Such teeth are not only considered attractive, but are also indicative of nutritional health, self-esteem and hygienic pride. Attention to accuracy and reliability of any spectral or color measurement system, with further attention to the proper statistical parameters to evaluate accuracy and reliability.
ABSTRACT
Aim: The aim of this study was to evaluate the effect of Morinda citrifolia juice (MCJ) and Triphala on sealer penetration depth into the dentinal tubules as root canal irrigants. Materials and Methods: Forty five single rooted extracted human teeth were collected; decoronated and root canal length were standardized to16mm. Cleaning and shaping was done with protaper universal rotary instruments till F5. 30 samples were selected randomly and divided into two groups with 15 samples in each, according to the final irrigation regimen. In Group I, 5 ml of MCJ was used for 1min and in Group II; 5 ml of Triphala was used. The remaining 15 samples were irrigated with 5ml of Smear clear which acted as a positive control Group. Obturation was done with corresponding gutta-percha points and AH 26 sealer (Dentsply; DeTrey, Konstanz, Germany) labelled with fluorescent dye and left to set for 48 hrs. Then, the roots were sectioned and subjected to confocal laser microscope. Results: Statistical analysis was done by two-way analysis of variance (ANOVA) and Tukey multiple post-hoc procedures. The sealer penetration depth is higher in the MCJ group than the Triphala group at all three levels. Conclusion: MCJ showed a significant sealer penetration depth than Triphala.
ABSTRACT
The ideal preparation for a root canal is a continuously tapered funnel shape with the smallest diameter at the apex and the widest diameter at the canal orifice. The main parameters used to evaluate a technique or an instrument which has been developed for root canal preparation should be ‘shaping the root canal whilst protecting the curvature of the canal’. Various methods have been proposed for evaluation of shaping ability of instruments. A reliable standardization and proper methodology is necessary for proper positioning of samples for obtaining images before and after root canal preparation. All techniques have their own benefits and limitations.
ABSTRACT
The current concept among clinicians is that after complete debridement, a three-dimensional obturation of the root canal space that is free of inflammation constitutes the key factor for successful endodontic therapy. Different sealer formulations have been subjected to extensive research with respect to their mechanical and biological properties, reflecting the prevailing belief that the appropriate selection of a sealer and its clinical performance may influence, at least in part, the outcome of endodontic therapy. Many techniques have been suggested and evaluated, most of them advocating the use of gutta-percha as the core material and with sealer of a different composition to fill the residual gaps between the individual gutta-percha points and between the gutta-percha and the canal wall. Evaluating the sealing competency of the sealers to the root canal walls is utmost consequential for the presage of outcome of treatment.
ABSTRACT
The objective of this study was to compare the shaping ability of three rotary filing systems; constant taper K3 instruments, constant taper ProFile instruments and progressive taper ProTaper rotary instruments in clear resin blocks with simulated curved root canals. Forty five resin blocks were divided into three groups. Group A preparation was conducted with K3, Group B with ProFile and Group C with ProTaper instruments. Pre and post instrumentation images were superimposed and assessment of the canal shape was completed with a computer image analysis program at 14 levels of the root canal system. Group A inner and outer curvature pre and post instrumentation values were significantly different [P<0.05] at levels 3; at level 13 only the outer curvature and levels 6, 7, 8 the inner curvature had significantly different values between pre and post instrumentation. Group C had significant P values [P<0.05] at levels 2, 3, 4, 12, 13 in the outer curvature and at levels 6, 7, 8 of the inner curvature. Overall, all three rotary instruments maintained root canal curvatures well. ProTaper instruments significantly removed more resin material from outer canal curvature in the apical third when compared to the Other two groups