Table 5 Root and canal morphology distribution in numbers and percentages based on age groups in maxillary premolars (n = 593).
Teeth | Age group | Variants | Total n (%) | p-value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1TN1 n (%) | 1TN1–2−1 n (%) | 1TN1–2 n (%) | 2TN B1 P1 n (%) | 2TNB1–2 P1 n (%) | 3TN MB1 DB1 P1 n (%) | 3TN 1(MB1 DB1)1 P1 n (%) | ||||
Maxillary first premolar | 10–20 | 0 | 0 | 0 | 8 (100) | 0 | 0 | 0 | 8 (100) | 0.154 |
> 20–30 | 3 (2.76) | 12 (11.0) | 0 | 93 (85.32) | 1 (0.92) | 0 | 0 | 109 (100) | ||
> 30–40 | 5 (3.78) | 16 (12.12) | 4 (3.04) | 103 (78.04) | 0 | 2 (1.50) | 2 (1.50) | 132 (100) | ||
> 40–50 | 0 | 13 (40.93) | 0 | 18 (58.07) | 0 | 0 | 0 | 30 (100) | ||
> 50–60 | 0 | 1 (11.12) | 0 | 8 (88.88) | 0 | 0 | 0 | 9 (100) | ||
> 60–70 | 0 | 1 (100) | 0 | 0 | 0 | 0 | 0 | 1 (100) | ||
Maxillary second premolar | 10–20 | 2 (50.0) | 0 | 0 | 2 (50.0) | 0 | 0 | 0 | 4 (100) | 0.425 |
> 20–30 | 79 (59.56) | 30 (23.06) | 8 (6.07) | 15 (11.30) | 0 | 0 | 0 | 133 (100) | ||
> 30–40 | 47 (37.92) | 60 (49.20) | 3 (2.40) | 12 (9.67) | 1 (0.80) | 0 | 0 | 124 (100) | ||
> 40–50 | 12 (40.0) | 14 (46.66) | 2 (6.67) | 2(6.67) | 0 | 0 | 0 | 30 (100) | ||
> 50–60 | 3 (30.0) | 3 (30.0) | 0 | 4 (40.0) | 0 | 0 | 0 | 10 (100) | ||
> 60–70 | 0 | 0 | 0 | 2 (100) | 0 | 0 | 0 | 2 (100) | ||
