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Table 7 Distances from root to the maxillary sinus floor. Different letters symbolize the statistic difference, p < 0.05, ANOVA test

From: CBCT evaluation of root canal morphology and anatomical relationship of root of maxillary second premolar to maxillary sinus in a western Chinese population

  \(\overline{X }\pm S\)(mm)
Second premolar: single root 2.47 ± 3.45a
Second premolar: buccal root 1.49 ± 3.21b
Second premolar: palatal root 2.13 ± 3.13ab
  1. Different superscript letter means different subsets which has magnificent statistic difference. The p-value between a and b is 0.025 < 0.05