Abstract
Objective: The present study's objective was to evaluate the percentage of endotoxin diminution after mechanical instrumentation of asymptomatic necrotic teeth with apical periodontitis using three mechanical systems. Materials and Methods: One hundred and eighty patients between 18 and 65 participated in this research. Thirty-five of 140 teeth were selected for the four enlargement techniques. Control group, TFA, WOG, and PTN groups received final flushing with 6oC 17% EDTA solution gently administered to the WL through a cold (6oC) sterile metallic micro-cannula attached to the Endovac system (Kerr Endo) for one minute. Two samples of the canal were obtained using a sterile paper cone (size 30) introduced into the canal´s full length. Results: Results showed a statistically significant difference between the two groups in the percentage reduction of endotoxin levels (P-value <0.001, Effect size = 0.598). Group PTN showed a statistically significantly lower median % reduction in endotoxin quantities than Group WOG and TFA. Conclusion: Under this study's conditions, it can be concluded that the PTN system was more effective in endotoxins reduction in teeth with necrotic pulps. When the RCT is correctly instrumented, single visit RCT can be as effective as a multiple visit treatment.
Highlights
The root canal treatment has a predictable result based on scientific evidence that guarantees high success [1]
Four qualified endodontists contributed to the project, following a preestablished technique for the Control Group (Balanced Force technique), Twisted File Adaptive (TFA), WaveOne TM (WON), and Protaper (PTN) instrument systems
Descriptive analysis and percentage reduction in human endotoxins were: 31.4% for Control Group (CG), 79.1% for TFA, 79.4% for WOG and, 89.7% for Protaper Next (PTN) are shown in tables 3 and 4
Summary
The root canal treatment has a predictable result based on scientific evidence that guarantees high success [1]. Some cases of wellfilled canals can harbor an infection that may be the cause of the maintenance of a periapical lesion that requires retreatment by the professional [2]. The microorganisms that infect the root canal system are the main etiological factor of periapical pathologies [3]. This type of periapical infection should be avoided, seeking the maximum elimination or reduction of microorganisms for the treatment or retreatment to be successful [4]. The decrease of bacteria and Auctores Publishing – Volume 8(2)-166 www.auctoresonline.org
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