Shaping ability of a pediatric motor-driven instrumentation system in primary molar root canal prototypes

Author(s)

Bianca Katsumata de Souza ^[1] ; Murilo Priori Alcalde ^[2] ; Marco Antonio Hungaro Duarte ^[3] ; Maria Aparecida Andrade Moreira Machado ^[4] ; Thais Marchini Oliveira ^[5] ; Natalino Lourenço Neto ^[6]

Affiliation

^[1] University of São Paulo - Brasil

^[2] University of São Paulo - Brasil

^[3] University of São Paulo - Brasil

^[4] University of São Paulo - Brasil

^[5] University of São Paulo - Brasil

^[6] University of São Paulo - Brasil

• Document type: Journal article
• Source: Brazilian Dental Journal; v. 34, n. 5, p. 36-42, 2023-12-22.

Abstract

Abstract Evaluate the shaping ability and preparation time using a pediatric motor-driven rotary instrumentation compared to other systems in resin prototypes of primary molars. Methods: Thirty specimens were scanned in micro-CT and divided into three groups according to the instrumentation type: pediatric motor-driven Sequence baby File (SBF); conventional motor-driven (Sequence Rotary File - SRF); manual K file. Instrumentation time was timed. After preparation, the specimens were scanned again. The pre- and post-instrumentation images were superimposed to measure the amount of root canal deviation and the resin remnant thickness. ANOVA followed by the Tukey test analyzed the comparisons between groups (p<0.05). Results: No statistically significant differences occurred in root canal deviation among groups (p>0.05). There were statistically significant differences in the comparison among root thirds (p<0.001) but without significant differences in the interaction group vs. root third (p>0.05). Both motor-driven instrumentations showed statistically greater weariness than manual instrumentation (p<0.001), without significant significant differences between SBF and SRF. Motor-driven instrumentation had a shorter working time than manual instrumentation (p<0.001). Conclusion: Pediatric motor-driven instrumentation demonstrated good outcomes in relation to root canal deviation and amount of remnant structure, with shorter instrumentation time. SBF can be a suitable alternative for endodontic instrumentation in primary molars. (AU)

• FAPESP's process: 21/06342-7 - Comparison between manual, rotary instrumentation, pediatric rotary instrumentation and reciprocating on the quality of preparation, timing and safety in prototyped primary molars
• Grantee: Natalino Lourenço Neto
• Support Opportunities: Regular Research Grants