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Root angulation presence and its orientation in first and second mandibular premolars
| Tooth | Number of teeth | Root angulation | Chi-square (df) | P value | ||||
|---|---|---|---|---|---|---|---|---|
| None (Straight) | Mesial | Distal | Lingual | Buccal | ||||
| First premolar | 255 | 183 (71.8%) | 11 (4.3%) | 61 (23.9%) | 0 (0%) | 0(0%) | 1.03 (2) | 0.579 |
| Second premolar | 221 | 173 (78.3%) | 8 (3.6%) | 39 (17.6%) | 1 (0.5%) | 0(0%) | ||
| Total | 476 | 356 (74.8%) | 19 (4%) | 100 (21.0%) | 1 (0.2%) | 0(0%) | ||
