Table 3 Root and canal morphology distribution in numbers and percentages based on age groups in maxillary anterior teeth (n = 1134).

From: Investigating root and canal morphology of anterior and premolar teeth using CBCT with a novel coding classification system in Saudi subpopulation

Teeth

Age group

Variants

Total

n (%)

Fisher’s exact value

p-value

1TN1

n (%)

1TN1–2−1

n (%)

1TN1–2

n (%)

Maxillary central incisors

10–20

16 (100)

0

0

16 (100)

8.72

0.472

>20–30

169 (100)

0

0

169 (100)

>30–40

105 (100)

0

0

105 (100)

>40–50

70 (100)

0

0

70 (100)

>50–60

18 (100)

0

0

18 (100)

>60–70

1 (100)

0

0

1 (100)

Maxillary lateral incisors

10–20

6 (100)

0

0

6 (100)

7.89

0.548

>20–30

157 (100)

0

0

157 (100)

>30–40

47 (100)

0

0

47 (100)

>40–50

8 (88.88)

1 (11.12)

0

9 (100)

>50–60

2 (100)

0

0

2 (100)

>60–70

2 (100)

0

0

2 (100)

Maxillary canines

10–20

8 (100)

0

0

8 (100)

7.50

0.620

>20–30

150 (98.68)

0

2 (1.32)

152 (100)

>30–40

158 (100)

0

0

185 (100)

>40–50

48 (100)

0

0

48 (100)

>50–60

10 (83.33)

2 (16.67)

0

12 (100)

>60–70

1 (100)

0

0

1 (100)

  1. Double-rooted maxillary lateral incisor is excluded.