Reciprocating and Rotatory NiTi Instruments Used for Root Canal Preparation of Primary Teeth: A Systematic Review and Meta-Analysis

Objective: To compare the root canal preparation of primary teeth with reciprocating and rotary NiTi instruments. Material Methods: Electronic databases (PubMed/MEDLINE, Web Science, TRIP, Lilacs, Embase, Scopus) were systematically searched until October 2020. In vitro studies comparing cleaning ability, debris extrusion, file deformation, or working time instruments in evaluated. Two reviewers independently selected studies, extracted data, assessed risk bias. Meta-analyses conducted using a random-effects model to calculate pooled mean differences between considering outcomes: (minutes) extrusion (milligrams). Statistical analyses performed RevMan 5.3 at significance level 5%. Results: From 4,417 potentially relevant 10 included systematic review, 8 considered meta-analyses. There was no significant difference [3 data sets; effect size: -0.11 (-0.25-0.04); p=0.15] [6 -0.37 (-0.98-0.24); p=0.24]. The heterogeneity found moderate high. bias low most (50.0% all items across studies). Conclusion: is scientific evidence showing superiority used for teeth.