Table 1.
The percentile cutoffs for the altitude to base ratio (h/b ratio) of permanent maxillary first molars with MB2 canal in gender (male vs. female) and side (right vs. left).
| h/b ratio (%) | 0–20 (%) | 20–40 (%) | 40–60 (%) | 60–80 (%) | 80–100 (%) | P |
|---|---|---|---|---|---|---|
| Gender, n (%) | 0.32 | |||||
| Male (n = 80) | 72 (90%) | 8 (10%) | 0 | 0 | 0 | |
| Female (n = 28) | 23 (82.1%) | 5 (17.9%) | 0 | 0 | 0 | |
| Side, n (%) | 0.38 | |||||
| Right (n = 57) | 52 (91.2%) | 5 (8.8%) | 0 | 0 | 0 | |
| Left (n = 51) | 43 (84.3%) | 8 (15.7%) | 0 | 0 | 0 | |
The level of statistical significance was set at P < 0.05.
MB2 = second mesiobuccal canal.