The present systematic review and meta-analysis evaluated in vitro studies by comparing residual dentine thickness in the coronal third after coronal flaring with different instruments. PubMed/ Medline, Scopus, Cochrane, Embase, and Web of Science databases were electronically searched for relevant articles published from January 2000 to the end of May 2020. The retrieved articles were exported to Endnote, and the duplicates were removed. A checklist was used for screening the articles. Data was analyzed using the STATA software. Four articles were selected for the final review. The first study compared the Gates Glidden (GG) drills with ProTaper and K3 rotary systems. The second study compared GG drills with ProTaper and RaCe rotary systems. The third study compared GG drills with ProTaper, and the fourth study compared GG drills with Profile system. The results showed that the thickness of residual dentine in the nickel-titanium (NiTi) group was 0.07 mm lower than that in the GG group, which was statistically significant (Z=5.47, P<0.000). The current results showed that the thickness of residual dentine in the coronal third in NiTi group was lower than that in the GG group.
Keywords:- dentine
- meta-analysis
- root canal therapy
- systematic review