Evaluation of cinnamon zylanicum (true cinnamon) versus ethylenediaminetetraacetic acid smear layer removal ability: A scanning electron microscope study.

BACKGROUND

The smear layer has been reported as an irritant and physical barrier on the dentin wall, and its removal is consistent with achieving the goal of biomechanical preparation.

AIM

The aim of this study was to examine and analyze the smear layer removing the ability of cinnamon zylanicum essential oil, and ethylenediaminetetraacetic acid (EDTA) final rinses.

MATERIALS AND METHODS

Thirty maxillary canines were collected, and after access the cavity, preparation working length was adjusted to 20 mm; root canals were instrumented up to apical size #40/0.04. Canals were rinsed with 5 ml of 2.25% sodium hypochlorite. Teeth were divided randomly into two groups: Group A (20% cinnamon zylanicum essential oil/1 min), and Group B (17% EDTA/1 min). Roots were split into labial and palatal halves and scanned using a scanning electron microscope and photomicrographs were processed using Image J software.

STATISTICAL ANALYSIS

one-way analysis of variance and Tukey test were used for intragroup comparison. The independent -test was used for intergroup comparison.

RESULTS

group (B) showed a higher percentage of open dentinal tubules with an average of 7.97% ± 2.35% and Group (A) showed a low mean percentage of open dentinal tubules with an average of 5.11% ± 2.65%). For both groups, the difference between coronal and middle thirds was not statistically significant, however, there was a significant difference between both thirds and the apical third ( < 0.001).

CONCLUSION

20% CEO final rinse has a smear layer removal potential lower than 17% EDTA.