Efficacy of different activation techniques of sodium hypochlorite on root canal anastomosis cleanliness: an in vitro study (original) (raw)
2022, Research Square (Research Square)
Objective: This study compared in vitro the anastomosis cleaning e cacy of three nal irrigation techniques; EDDY sonic activation, passive ultrasonic irrigation (PUI) using Irrisafe, and nal needle irrigation without activation (FNI) (control group). Methods: anastomosis-containing mesial roots of mandibular molars were mounted in resin, sectioned at 2, 4, and 6 mm from the apex. Then reassembled and instrumented in a copper cube based on the model by Bramante. Images of anastomoses were taken after instrumentation. ImageJ program was used to calculate the percentage of anastomosis cleanliness. For the nal irrigation technique roots were randomly divided into 3 groups (n=20): group 1: FNI, group 2: PUI, group 3: EDDY. Images were taken and cleanliness percentage was calculated. Debris removal before and after nal irrigation were compared using paired t-tests. Intergroup and intragroup analyses were performed using one-way analysis of variance and post hoc tests (p<0.05). Results: All three nal irrigation techniques signi cantly improved anastomosis cleanliness (p<0.001). Both activation techniques were signi cantly better than the control group at all levels. Intergroup comparison revealed that EDDY signi cantly achieved the best overall anastomosis cleanliness. The difference between EDDY and PUI was signi cant in favor to EDDY at 2 mm and insigni cant at 4 and 6 mm. The intragroup comparison showed that the effect of FNI on cleanliness was most signi cant in the 2 mm level. The improvement achieved by PUI was signi cantly lower at 2 mm while EDDY performed similarly at all levels. Conclusions: Irrigant activation improves anastomosis cleanliness. EDDY was the most e cient in cleaning anastomoses located in the most apical part of the root canal. Clinical Relevance: E cient cleaning of the root canal system is the crucial point which can lead to either success or failure of the treatment. In cases of a complete isthmus (corridor), it can be very di cult to clean and disinfect with conventional methods used in non-surgical root canal treatment. Different methods of irrigant activation can be a promising solution.
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