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Table 4 The curvature of root canal on its dominantly curved side and gring. *p < 0.05, independent samples t 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

 

Average curvature \(\left[ {\overline{X} \pm S\left(^\circ \right)} \right]\)

Curvature degree [n, (%)]

Dominantly curved direction

 

Moderately curved (10–25°)

Severely curved (> 25°)

Mesiodistal

18.06 ± 10.39

494 (78.4)

136 (21.6)

Buccopalatal

21.36 ± 8.62a

321 (71.7)

127 (28.3)

  1. aSignificant difference, p = 0.000000 < 0.05