Correction to: Clinical Oral Investigations

https://doi.org/10.1007/s00784-018-2628-2

Figures 2 and 3 in the published version of this article contained a mistake. CCP and DCP should have been FEG and NFEG. Correct figures are presented here.

Fig. 2
figure 1

a Sample in which foraminal enlargement was preformed (FEG), showing periapical tissue healing (TH) and absence of inflammatory infiltrate. b Periapical tissue reaction in a sample without foraminal enlargement (NFEG): moderate inflammatory infiltrate with sparse neutrophils restricted to the area close to the apical foramen (arrows). c Both FEG and NFEG showed less intense inflammatory infiltrate compared to the control (****p < .0001 and **p < .01). Significant differences of inflammation intensity were not detected between the experimental groups, although NFEG scored slightly higher

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Fig. 3
figure 2

a Absence of root resorption and complete biological seal (CBS) in a sample of foraminal enlargement group (FEG). b Absent dental resorption, cementum neoformation, and partial biological sealing (PBS) in a sample of non-foraminal enlargement group (NFEG). c Non-instrumented samples showed large areas of root resorption (arrows) and absence of neoformed cementum. d Both FEG and NFEG showed greater cementum neoformation compared to the control (****p < .0001). Significant differences were also observed comparing FEG and NFEG (**p < .01). Regarding root resorption, only samples instrumented in the entire root canal length (FEG) presented significantly decreased scores (***p < .001) compared to the non-instrumented samples (control)

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The original article has been corrected.