Table 7 Prevalences of different traits and anomalies in both sides of jaws in boys and girls. The P values are calculated using the chi-square test
Jaw | Tooth | Trait | Â | Sex (%) | Total prevalence (%) | P | |
|---|---|---|---|---|---|---|---|
Female | Male | ||||||
Maxilla | D | Accessory cusp on the upper D | Absent | 35 (49.3) | 32 (45.1) | 67 (94.4) | 0.511 |
Unilateral | 0 (0) | 1 (1.4) | 1 (1.4) | ||||
Bilateral | 2 (2.8) | 1 (1.4) | 3 (4.2) | ||||
Maxilla | E | Carabelli’s cusp on the upper E | Absent | 36 (37.1) | 29 (29.9) | 65 (67) | 0.972 |
Unilateral | 7 (7.2) | 6 (6.2) | 13 (13.4) | ||||
Bilateral | 11 (11.3) | 8 (8.2) | 19 (19.6) | ||||
Mandible | E | Protostylid on the lower E | Absent | 31 (39.2) | 27 (34.2) | 58 (73.4) | 0.273 |
Unilateral | 4 (5.1) | 2 (2.5) | 6 (7.6) | ||||
Bilateral | 5 (6.3) | 10 (12.7) | 15 (19) | ||||
Mandible | E | Deflecting wrinkle on the lower E | Absent | 33 (41.8) | 18 (22.8) | 51 (64.6) | 0.001 |
Unilateral | 3 (3.8) | 3 (3.8) | 6 (7.6) | ||||
Bilateral | 4 (5.1) | 18 (22.8) | 22 (27.8) | ||||
Maxilla | E | Fifth cusp on the upper E | Absent | 49 (50.5) | 36 (37.1) | 85 (87.6) | 0.490 |
Unilateral | 2 (2.1) | 4 (4.1) | 6 (6.2) | ||||
Bilateral | 3 (3.1) | 3 (3.1) | 6 (6.2) | ||||
Mandible | D | Accessory cusp on the lower D | Absent | 22 (36.7) | 27 (45) | 49 (81.7) | 0.452 |
Unilateral | 3 (5) | 1 (1.7) | 4 (6.7) | ||||
Bilateral | 4 (6.7) | 3 (5) | 7 (11.7) | ||||
Mandible | E | Fifth cusp on the lower E | Unilateral | 16 (20.3) | 9 (11.4) | 25 (31.6) | 0.106 |
Bilateral | 24 (30.4) | 30 (38) | 54 (68.4) | ||||
Mandible | E | Sixth cusp on the lower E | Absent | 32 (40.5) | 33 (41.8) | 65 (82.3) | 0.606 |
Unilateral | 3 (3.8) | 1 (1.3) | 4 (5.1) | ||||
Bilateral | 5 (6.3) | 5 (6.3) | 10 (12.7) | ||||
Mandible | E | Tuberculum intermedium (metaconulid) on the lower E | Absent | 25 (31.6) | 32 (40.5) | 57 (72.2) | 0.029 |
Unilateral | 6 (7.6) | 0 (0) | 6 (7.6) | ||||
Bilateral | 9 (11.4) | 7 (8.9) | 16 (20.3) | ||||