Table 1.
The vertical relationship between root of the maxillary premolars/molars and the sinus floor.
| Class I | Class II | Class III | Class IV | Class V | Total | ||
|---|---|---|---|---|---|---|---|
| Right | |||||||
| 2nd premolars | 238 (39.5%) | 59 (9.8%) | 7 (1.20%) | 1 (0.2) | 0 (0%) | 305 (50.7%) | |
| 1st molars | 119 (23.8%) | 100 (20.0%) | 18 (3.6%) | 17 (3.4%) | 2 (0.4%) | 256 (51.2%) | |
| 2nd molars | 127 (20.4%) | 117 (18.8%) | 43 (6.9%) | 17 (2.7%) | 0 (0%) | 304 (48.8%) | |
| 3rd molars | 103 (29.7%) | 57 (16.4%) | 10 (2.9%) | 1 (0.3%) | 0 (0%) | 171 (49.3%) | |
| Left | |||||||
| 2nd premolars | 230 (38.2%) | 58 (9.6%) | 6 (1%) | 2 (0.2%) | 1 (0.2%) | 297 (49.3%) | |
| 1st molars | 108 (21.6%) | 94 (18.8%) | 23 (4.6%) | 18 (3.6%) | 1 (0.2%) | 244 (48.8%) | |
| 2nd molars | 102 (16.4%) | 178 (28.6%) | 26 (4.2%) | 10 (1.6%) | 3 (0.5%) | 319 (51.2%) | |
| 3rd molars | 100 (28.8%) | 68 (19.6%) | 2 (0.6%) | 4 (1.2%) | 2 (0.6%) | 176 (50.7%) | |
| Total | 1127 | 731 | 135 | 70 | 9 |