A Micro Computed Tomography Study on Removal of Accumulated Hard-tissue Debris in Root Canals of Primary Teeth by Photon Induced Photoacoustic Streaming

doi:10.13701/j.cnki.kqyxyj.2022.11.016

Abstract

Abstract: Objective: To investigate the cleaning effects of photon induced photoacoustic streaming (PIPS) irrigation in the removal of accumulated hard tissue debris (AHTD) in the root canal of primary teeth by using micro-CT analysis. Methods: Thirty deciduous incisors were divided into six groups with five teeth in each group: t1 (1% NaOCl); t2 (1% NaOCl +17% EDTA); t3 (UAI); t4 (0.15 W-PIPS); t5 (0.3 W-PIPS); and t6 (0.6 W-PIPS). After micro-CT scans, root canal volume, debris volume, and percentage reduction of AHTD in the canals were calculated. Results: The volume of all the root canals altered slightly after preparation. Significant differences between the debris volume of total root canals pre and post irrigation in each group (P<0.05) were obtained. The t5 group had the largest percent reduction of AHTD, with the lowest being t1 and t2 groups in the cervical, apical, and total root canal. In intra-group analysis, t1, t5, and t6 groups displayed significant differences, with the cervical region presenting a greater volume of debris than the apical portion (P<0.05). Conclusion: Primary teeth root canal cleanliness was significantly improved with different activation techniques. The greatest debris reduction of cervical and apical regions of primary teeth was obtained with the PIPS protocol under 0.3-W power.

Key words: hard-tissue debris, irrigation-induced photoacoustic streaming, ultrasonic, primary teeth

MENG Si, HUANG Wenyan, WU Yuejun, YANG Jingjing, GE Lihong, ZENG Sujuan. A Micro Computed Tomography Study on Removal of Accumulated Hard-tissue Debris in Root Canals of Primary Teeth by Photon Induced Photoacoustic Streaming[J]. Journal of Oral Science Research, 2022, 38(11): 1082-1086.

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