Correction to: BMC Oral Health. https://doi.org/10.1186/s12903-021-01494-3

Following publication of the original article [1], the authors identified errors in Figs. 4 and 5. The correct figures are given below.

Fig. 4
figure 4

Random-effects model analyses comparing pre-twenty-first century and twenty-first century techniques

Fig. 5
figure 5

Cumulative meta-analysis for all studies

The original article [1] has been corrected.