Table 3.
Traits prevalence in the upper permanent molars
Prävalenz von Merkmalen der oberen bleibenden Molaren
| Trait/Grade | First molars | Second molars | χ2 test | |||||
|---|---|---|---|---|---|---|---|---|
| (laterality) | (dimorphism) | |||||||
| UM1 (r) | UM1 (l) | UM2 (r) | UM2 (l) | UM1 | UM2 | UM1 | UM2 | |
| CARABELLI TRAIT, n (%) | ||||||||
| 0. Smooth surface | 86 (54.1) | 88 (55.0) | 14 (91.2) | 147 (93.0) | 0.985 | 0.910 | 0.637 | 0.279 |
| 1. Vertical groove | 17 (10.7) | 12 (7.5) | 5 (3.1) | 4 (2.5) | ||||
| 2. Pit | 6 (3.8) | 7 (4.4) | 4 (2.5) | 1 (0.6) | ||||
| 3. Small Y‑shaped | 14 (8.8) | 16 (10.0) | 2 (1.3) | 3 (1.9) | ||||
| 4. Large Y‑shaped | 7 (4.4) | 9 (5.6) | 1 (0.6) | 1 (0.6) | ||||
| 5. Small cusp | 9 (5.7) | 8 (5.0) | 1 (0.6) | 1 (0.6) | ||||
| 6. Medium cusp | 17 (10.7) | 17 (10.6) | 1 (0.6) | 1 (0.6) | ||||
| 7. Large free cusp | 3 (1.9) | 3 (1.9) | – | – | ||||
| METACONE, n (%) | ||||||||
| 2. Faint cuspule | – | – | – | 1 (0.7) | 0.850 | 0.713 | 0.791 | 0.698 |
| 3. Weak cusp | – | – | 8 (5.3) | 10 (6.8) | ||||
| 4. Large cusp | 20 (12.6) | 21 (13.3) | 85 (56.3) | 82 (55.8) | ||||
| 5. Very large cusp | 139 (87.4) | 137 (86.2) | 58 (38.4) | 54 (36.7) | ||||
| HYPOCONE, n (%) | ||||||||
| 0. Smooth surface | – | – | 23 (16.5) | 17 (12.7) | 0.999 | 0.818 | 0.041* | 0.578 |
| 1/2. Faint ridge and Faint cuspule | 1 (0.6) | 1 (0.6) | 34 (24.5) | 35 (26.1) | ||||
| 3. Small cusp | 2 (1.3) | 2 (1.3) | 52 (37.4) | 54 (40.3) | ||||
| 4/5. Large and very large cusp | 157 (98.1) | 157 (98.1) | 30 (21.6) | 28 (20.9) | ||||
| METACONULE, n (%) | ||||||||
| 0. Trait is absent | 142 (89.9) | 145 (92.4) | 116 (87.2) | 115 (91.3) | 0.950 | 0.962 | 0.054 | 0.617 |
| 1. Faint cuspule | 6 (3.8) | 3 (1.9) | 4 (3.1) | 4 (3.2) | ||||
| 2. Trace cuspule | 5 (3.2) | 4 (2.5) | 7 (5.4) | 5 (3.9) | ||||
| 3. Small cuspule | 1 (0.6) | 1 (0.6) | 2 (1.5) | 1 (0.8) | ||||
| 4. Small cusp | 1 (0.6) | 1 (0.6) | 1 (0.75) | 1 (0.8) | ||||
| 5. Medium-sized cusp | 3 (1.9) | 3 (1.9) | – | – | ||||
| PARASTYLE, n (%) | ||||||||
| 0. Smooth surface | 162 (100.0) | 162 (100.0) | 158 (99.4) | 154 (99.4) | – | 0.999 | – | 0.150 |
| 4. Large cusp | – | – | 1 (0.6) | 1 (0.6) | ||||
U upper, M molar, 1 first, 2 second, (r) right, (l) left
*Statistical difference (p ≤ 0.05)