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Published on: October 11, 2024
Shaping ability of hand, rotary and reciprocating files in primary teeth: a micro-CT study in vitro
J C Barasuol1, M P Alcalde2, E A Bortoluzzi3
1Pediatric Dentistry Division, Department of Dentistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil. jessica.barasuol@hotmail.com.
Purpose:
Compare canal transportation and dentin removal using micro computed tomography (micro-CT) and measure instrumentation time in the root canal preparation of primary molars using K-files, ProDesign Logic and Reciproc files.
Methods:
A representative sample of 81 root canals of primary molars was randomised into three groups: K-files (#15-40), ProDesign Logic (#25) and Reciproc (R25). A single-trained operator prepared all root canals. A standardised micro-CT evaluation was performed before and after instrumentation using the CTan® program. Instrumentation time was also recorded. Statistical analysis involved one-way ANOVA, Tukey's post hoc test, Kruskal-Wallis test and Dunn's test, considering a 5% level of significance.
Results:
Reciproc led to more canal transportation than K-files and ProDesign Logic (p < 0.001) in middle third, whereas K-files led to the most canal transportation in the apical third (p = 0.017). ProDesign Logic and Reciproc removed less dentin on the opposite side of the root curvature in the apical third compared to K-files (p = 0.008). Instrumentation time was better with ProDesign Logic and Reciproc than K-files (p < 0.001).
Conclusion:
ProDesign Logic demonstrated good results with regard to canal transportation and required less instrumentation time in primary molars. Reciproc and K-files led to the most canal transportation in the middle and apical third, respectively.
