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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
*

Panorex not available for 13 patients.

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