Morphometric analysis of the effectiveness of different concentrations of sodium hypochlorite associated with rotary instrumentation for root canal cleaning

Abstract

This study evaluated the cleaning capacity of Profile.04 instruments with different concentrations of NaOCl solutions on flattened root canals. Twenty central mandibular incisors were divided into 4 groups: Group I: 0.5% NaOCl; Group II: 1% NaOCl; Group III: 5% NaOCl; Group IV: distilled and deionized water. After chemomechanical preparation, the teeth were submitted to histological preparation and morphometric analysis. Morphometric analysis showed that the 5% NaOCl was significantly more efficient in cleaning the root canal than 0.5% NaOCl and distilled water, which had the lowest levels of cleaning of the root canals (p<0.01).

Effectiveness of different final irrigation protocols in removing debris in flattened root canals

“…This reaction can be accentuated by continuous flux and larger amount of solution, which would provide the effective removal of superficial debris and prolongation of the chemical activity of the solution (7,9). According to Baratto-Filho et al (6), rotary instrumentation combined with NaOCl irrigation at different concentrations between each instrument evidenced greater debris removal for the 5% NaOCl solution when compared to the 0.5% solution, whereas in the present study, the increased concentration in the final irrigation did not contribute to canal cleaning. On the other hand, other authors observed that in the final irrigation, the NaOCl energized with ultrasound contributed to debris removal, in comparison to distilled water energized by ultrasound as well (13).…”

“…However, nickel-titanium instruments are not effective for cleaning flattened root canals, or those in which the canal shape does not allow instrumentation (4,5). In these situations, irrigant solutions may assume fundamental importance in biomechanical preparation (6). Among these solutions advised for biomechanical preparation, sodium hypochlorite, at different concentrations, is the most used due to its properties of clarification, organic tissue dissolution, saponification, transformation of amines into chloramines, deodorization and antimicrobial action (7,8).…”

Performance of RaCe Instrumentation System in Curved Root Canals: A Comprehensive Analysis by Three Study Methods

“…Several studies (8,18) evaluated the cleaning ability of RaCe rotary system. Even with the continuous and expansive development of instruments and preparation techniques, scientific literature has reported that there is not a single technique nor instrument system that totally cleans the root canal (5).…”

Capacidade de dissolução do hipoclorito de sódio e da clorexidina sobre biofilme oral formado 'in situ'

“…Esta análise consistiu em dividir a imagem em 100 quadrados, cada um com a mesma área. Similar metodologia foi empregada por MARCHESAN et al, 2003;BARATTO-FILHO et al, 2004;FORNARI et al, 2010;GONÇALVES et al, 2010. A análise morfométrica foi realizada em vista que a Ferramenta Z-Stack do software Leica LAS-AF, somente mede a espessura do biofilme desde sua parte mais alta até a superfície dentinária, sem ter em consideração a biomassa total na superfície dos blocos de dentina. (ANEXO I).…”