Morphological Assessment and Cleaning Capacity of a Reciprocating System in Root Canals of Deciduous Teeth

Objective:To assess root canal morphological results and cleaning capacity in deciduous teeth instrumented with a reciprocating system.Material and Methods:15 deciduous molars and a total of 24 canals were selected for the study. Nine teeth(13 canals) were selected at random for microbiological analysis and 6 teeth (11 canals) were used for tomographic analysis of morphology. The roots used for the microbiological assessment were contaminated with standard strains of Enterococcus faecalis. All roots were instrumented using the WaveOne System with a Small (21:06) 21mm file and an X-Smart plus motor. Tomography was conducted with an I-CAT machine before and after instrumentation with the objective of analyzing the WaveOne System's shaping capacity. Statistics: Biostat 4.0 software was used to analyze results. The microbiological results (log10) and tomographic results (pixels) were analyzed using descriptive statistics and the Wilcoxon test.Results:There was a significant reduction in Enterococcus faecalis colony-forming units after instrumentation of the root canal systems of deciduous molars using the WaveOne system (p=0.0033) and significant enlargement of the root canal systems was observed after instrumentation (p=0.047), while morphology was maintained. Conclusion:The WaveOne System, using the Small file was effective for disinfection of the root canal systems of deciduous molars

A comparative study of two high-viscosity ionomeric cements for the sealing of newly erupted permanent molars

To compare the retention and preventive aspects of two different types of high-viscosity glass ionomer cements for newly erupted permanent molars, considering the cost-benefit ratio in relation to public health.Material and Methods:fifty-four children (5-12 years) with erupted molars were selected. One hundred and fifty-four teeth were sealed, 75 with Ketac Molar (KM) and 79 with Vitro Molar (VM). Before and aftersealant application, photos were taken and condensation silicone casts were produced in order to better classify tooth eruption stage and to assess the sealant retention rate.Results:Fifty-six percent of teeth sealed with KM showed fully retained material (FR) after the 5-month follow-up period; 18.4 % showed KM in two-thirds of the occlusal surface (partial retention 2-PP2); 23.7 % in one third of the occlusal surface (partial retention 1-PP1); and only 1.3 % of sealed teeth showed total loss (TL). Among teeth sealed with VM, 28.8 % showed total retention (TR) of the sealant after 5 months; 7.5 % of sealants were present in two-thirds of the occlusal surface (PP2); 10% were present in one third of the occlusal surface (PP1), and 53.7 % showed total lossof the sealant (TL). The development of only one active white spot caries lesion after total sealant loss was observed in the VM group.Conclusion:Occlusal surfaces of newly erupted permanent molars sealed with high-viscosity KM glass ionomer cement exhibited higher retention when compared to VM after a 5-the development of carious lesions in sealed teeth was similar in both materials, which confirms the good clinical performance of glass ionomer cement sealants in the evaluation period, being highly significant when considering the cost-benefit ratio in relation to public health (KM cost is 4 times higher than VM cost)...