Table 2 Distribution of the relationship between maxillary molars root apices and the MSFs by age (%)
Age | MBR | DBR | PR | ||||||
|---|---|---|---|---|---|---|---|---|---|
Type OS | Type CO | Type IS | Type OS | Type CO | Type IS | Type OS | Type CO | Type IS | |
MFMs 18-40y | 41.5 | 36.8 | 21.7 | 40.4 | 37.9 | 21.7 | 37.7 | 25.7 | 36.6 |
MFMs 41-60y | 61.5 | 30.7 | 7.8 | 62.3 | 31.7 | 6.0 | 52.8 | 30.1 | 17.1 |
MFMs >60y | 74.6 | 22.6 | 2.8 | 76.0 | 21.2 | 2.8 | 63.2 | 27.6 | 9.2 |
MSMs 18-40y | 29.5 | 35.1 | 35.4 | 36.8 | 39.0 | 24.2 | 44.2 | 35.7 | 20.1 |
MSMs 41-60y | 48.7 | 40.4 | 10.9 | 60.0 | 31.6 | 8.4 | 65.7 | 28.2 | 6.1 |
MSMs >60y | 54.0 | 37.4 | 8.6 | 66.7 | 26.5 | 6.8 | 66.7 | 25.2 | 8.1 |