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Table II
Dental manifestations in temporary and permanent teeth in patients with OI type III and IV [4].
| Finding | Type III OI (n = 22) | Type IV OI (n = 18) | |
|---|---|---|---|
| Malocclusion | Class I | 9.1% | 23.5% |
| Class II | 9.1% | 15.9% | |
| Class III | 81.8% | 70.6% | |
| Open bite | Anterior | 31.8% | 17.7% |
| Posterior | 27.3% | 33.3% | |
| Aged > 9 y | 46% | 46% | |
| Crossbite | Anterior | 27.3% | 29.4% |
| Posterior | 36.4% | 47.1% | |
| Dental development* | n = 14 | n = 13 | |
| Advanced (>12 mo) | 14.3% | 23.0% | |
| Appropriate | 64.7% | 69.0% | |
| Late (>12 mo) | 21.0% | 8.0% | |
| Ectopic eruption | Upper first molars only | n = 3 | n = 4 |
| Upper second molars only | n = 2 | n = 1 | |
| Upper and lower second molars | n = 3 | 0 | |
| Congenitally missing teeth | n = 3 | n = 1 |
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