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Table 3 Number of distolingual roots in each category of curvature

From: Prevalence and morphology study of distolingual root in mandibular first and second molars in Thai population: a cone-beam computed tomography analysis

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Angle of curvature

(Schneider’s method)

Radius of curvature

Straight

(< 10°)

(%)

Moderate

(10° − 25°)

(%)

Severe

(> 25°)

(%)

Small

(< 4 mm)

(%)

Moderate

(4–8 mm)

(%)

Large

(> 8 mm)

(%)

Clinical

6 (4.9)

11 (8.9)

106 (86.2)

54 (45.4)

43 (36.1)

22 (18.5)

Proximal

0 (0)

0 (0)

123 (100)

97 (78.9)

26 (21.1)

0 (0)