Capacidad de disolución del hipoclorito de sodio a diferentes temperaturas y concentraciones : estudio in-vitro.

Abstract

Introduction: One of the most commonly used irrigants for cleaning the root canal system in endodontic treatments is sodium hypochlorite (NaOCl), due to its ability to dissolve organic tissue and its antimicrobial action. Factors such as solution concentration and temperature may influence its effectiveness. Objective: To determine the tissue-dissolving capacity of sodium hypochlorite on organic matter. Materials and Methods: An experimental, in vitro study with a 2×2 factorial design, employing a quantitative approach was conducted. An in vitro experiment was carried out with 60 simulated premolars randomly assigned to four treatment groups, established by combining two NaOCl concentrations (2.5% and 5.25%) and two temperatures (cold and warm). Results: The univariate general linear model with fixed effects showed that both factors, as well as their interaction (temperature * concentration), were statistically significant (p < 0.05) on weight difference. The 5.25% concentration produced a greater effect compared to 2.5%, while the warm temperature demonstrated a substantial increase compared to the cold condition. The coefficient of determination indicated that the model explained 84.4% of the total variability in weight difference. Conclusions: Increasing both the concentration and the temperature of NaOCl enhanced its tissue-dissolving capacity. The most effective in vitro combination was 5.25% NaOCl under warm conditions.