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Distribution of number of canals in maxillary first molar according to age
| Number of canals | Age (year) (%) | Total | |||||
|---|---|---|---|---|---|---|---|
| 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | ||
| Three | 2 (22.2) | 15 (10.1) | 1 (2.8) | 1 (4.2) | 5 (23.5) | 4 (23.5) | 15 (10.1) |
| Four | 7 (77.8) | 117 (78.5) | 33 (91.7) | 20 (83.3) | 13 (61.9) | 11 (64.7) | 117 (78.5) |
| Five | 0 (0) | 17 (11.4) | 2 (5.6) | 1 (12.5) | 3 (14.30 | 2 (11.8) | 17 (11.4) |
| Total | 9 (100) | 149 (100) | 36 (100) | 24 (100) | 21 (100) | 17 (100) | 149 (100) |
