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Influence of obturating techniques on root dentin crack propagation: A micro-computed tomography assessment
Praveen Kumar Chellapilla1, Mohan Rao Boddeda1, Mandava Jyothi1
1Department of Conservative Dentistry and Endodontics, GITAM Dental College and Hospital, Visakhapatnam, Andra Pradesh, India.
Aim:
The aim is to assess and compare the microcrack formation in radicular dentin after obturating the root canals with cold lateral condensation (CLC), warm vertical condensation (WVC), and injectable gutta-percha (IGP) techniques using micro-computed tomography (CT).
Materials And Methods:
Human extracted mandibular premolar teeth (n = 60) were haphazardly assigned based on the obturation technique into three experimental groups (n = 20 each). Root canals are cleaned and shaped with M Two rotary files and 3% sodium hypochlorite irrigant. Cross-sectional images were taken with Micro-CT to record the baseline defects present on root samples. After root canal obturation either with CLC or WVC or injectable obturation techniques, micro-CT images were captured again to analyze the increase in the number and type of dentinal defects. Statistical analysis of data was performed using the Mann-Whitney U test and the Mcnemar test at 5% significance level.
Results:
An increase in the number of radicular micro-cracks was identified in samples obturated with lateral condensation technique (1.66%). No change in the percentage of micro-cracks was recorded after obturation with warm vertical or injectable guttapercha (IGP) techniques (P > 0.05). The three obturation techniques were not statistically different in the occurrence of micro-cracks after obturation.
Conclusion:
The three obturating techniques tested showed no significant increase in radicular dentin defects' occurrence or propagation.
