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Age at time of injury and post traumatic sequelae
| Age group (yrs) | APartial obliteration No (%) | BTotal obliteration No (%) | CPulp necrosis No (%) | Total No (%) |
| 1 – 10 | 38 (52.8) | 29 (40.3) | 5 (6.9) | 72 (100) |
| 11 – 20 | 29 (52.8) | 17 (30.9) | 9 (16.3) | 55 (100) |
| 21 – 30 | 13 (31.7) | 7 (17.1) | 21 (51.2) | 41 (100) |
(A+B)vsC: χ2 = 31.57, df = 2, p < 0.001; AvsB: χ2 = 1.07, df = 2, p = 0.59
