Table 5.
Relationship between temporomandibular disorder (TMD) sign(s) and risk factors
| TMD sign(s) | p value | ||||
|---|---|---|---|---|---|
| Absent | Present | ||||
| Overbite | |||||
| 0–3 mm | N | 195 | 87 | 0.014* | |
| % | 69.1% | 30.9% | |||
| 4–6 mm | N | 7 | 9 | ||
| % | 43.8% | 56.3% | |||
| >6 mm | N | 0 | 2 | ||
| % | 0.0% | 100.0% | |||
| Overjet | |||||
| 0–3 mm | N | 184 | 86 | 0.013* | |
| % | 68.1% | 31.9% | |||
| 4–6 mm | N | 10 | 12 | ||
| % | 45.5% | 54.5% | |||
| >6 mm | N | 8 | 0 | ||
| % | 100.0% | 0.0% | |||
| Bruxism | |||||
| Absent | N | 147 | 53 | 0.001* | |
| % | 73.5% | 26.5% | |||
| Present | N | 55 | 45 | ||
| % | 55.0% | 45.0% | |||
| Open bite | |||||
| Absent | N | 193 | 94 | 0.88, NS | |
| % | 67.2% | 32.8% | |||
| Present | N | 9 | 4 | ||
| % | 69.2% | 30.8% | |||
| Molar relation | |||||
| Bilateral class I | N | 150 | 73 | 0.690, NS | |
| % | 67.3% | 32.7% | |||
| Bilateral class II div I | N | 20 | 9 | ||
| % | 69.0% | 31.0% | |||
| Bilateral class II div II | N | 3 | 0 | ||
| % | 100.0% | 0.0% | |||
| Bilateral class III | N | 0 | 0 | ||
| % | 0.00% | 0.00% | |||
| Different classes on the both side | N | 28 | 16 | ||
| % | 63.6% | 36.4% | |||
| Bimaxillary protrusion | N | 1 | 0 | ||
| % | 100.0% | 0.0% | |||
| Cross bite | |||||
| Absence of crossbite | N | 161 | 77 | 0.08, NS | |
| % | 67.6% | 32.4% | |||
| Presence of anterior crossbite | N | 37 | 12 | ||
| % | 75.5% | 24.5% | |||
| Presence of posterior bilateral crossbite | N | 0 | 4 | ||
| % | 0.0% | 100.0% | |||
| Presence of posterior unilateral crossbite | N | 4 | 5 | ||
| % | 44.4% | 55.6% | |||
*
Statistically significant difference. NS, not significant