Abstract
Aim: The aim of the study was to evaluate the cleaning of mandibular incisors with WaveOne Gold® (WO) under different preparation techniques. Methods: A total of 210 human mandibular incisors were selected and divided into seven groups (n = 30), prepared by WO single-files (Small 20/.07 – WOS; Primary 25/.07 – WOP; Medium 35/.06 – WOM; or Large 45/.05 - WOL) and sequential-file techniques (WOS to WOP; WOS to WOM; and WOS to WOL). Further subdivision was made according to irrigation protocol: control group (manual irrigation - CON), E1 Irrisonic® - EIR, and EDDY® - EDD. Debris removal and the smear layer were evaluated by scanning electron microscopy. Data were analyzed by using Spearman’s correlation test. The significance level was set at 5%. Results: For debris and smear layer removal, WOS and WOP, EIR differed from CON and EDD (p <0.05). Conclusion: Regardless of the instrumentation used, the agitation of the irrigant solution provided better cleanability. These findings reinforce the need for agitation techniques as adjuvants in cleaning root canal systems in mandibular incisors.
Highlights
Endodontic therapy aims to promote the shaping of the root canal system, eliminating microorganisms, tissue remains and debris, promoting a sanitized place for obturation1.In all dental groups cleaning of the apical region is a challenge, as reported by many authors2,3, but some teeth have anatomical characteristics that make this process more difficult, such as the mandibular incisors
The sequential use of WOS to WOP instruments resulted in greater removal of debris and smear layer, with a statistically significant difference when compared to WOP (p
This study aimed to evaluate the cleaning of mandibular incisors with WaveOne Gold® (WO) under different preparation techniques
Summary
In all dental groups cleaning of the apical region is a challenge, as reported by many authors, but some teeth have anatomical characteristics that make this process more difficult, such as the mandibular incisors. These teeth are especially flatted and narrow, and it is known that the excessive dentin wall wear due to the use of large instruments can lead to root weakening, while the use of less tapered instruments can lead to non-instrumented areas. Findings indicate significant results regarding the reduction of root canal microorganisms using the combination of chemical and mechanical preparation. The WaveOne Gold® (WO) system was presented in this context and featured in Small (20/.07), Primary (25/.07), Medium (35/.06), and Large (45/.05) (Dentsply Sirona Endodontics, Ballaigues, Switzerland)
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