title: [The investigation analysis of malocclusion in the juvenile in Shanghai Pudong New Area]
abstract: OBJECTIVE:To understanding the rate of malocclusion in the juvenile in Shanghai Pudong new area.Emphasising to know the rate of crowding,overbite or overjet and anterior crossbite.METHODS:1785 person with the age from 7 to 12 are investigated.According to Angle's classification of malocclusion they are classify.RESULTS:The rate of malocclusion is 44.02% in the mix dentition and 48.78% in the permanent dentition.The crowding rates are:mix dentition 22.74%,permanent dentition 32.36%.The overbite or overjet rates are:mix dentition 17.18%,permanent dentition 11.06%.The anterior crossbite rates are:mix dentition 4.44%,permanent dentition 4.07%. CONCLUSION:There are no significant differences between the rate of malocclusion in thr mix and permanent dentitions.It is important that the patients with the overbite/overjet and crossbite should be treated as early as possible.
authors.affiliation: Department of Oral,Shanghai East Hospital. Shanghai 200120, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Li
authors.forename: X J
authors.initials: XJ
authors.lastname: Yang
authors.forename: H X
authors.initials: HX
authors.lastname: Wu