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Preventive and Interceptive Orthodontic Treatment Needs of an Inner-City Group of 6- and 9-Year-Old Canadian ChildrenFULL TEXT
Nicholas Karaiskos, BSc(Hon), BSc(Dent), DMD
A b s t r a c t
Methods: Two calibrated examiners examined each child independently and assessed several components of his or her occlusion, including molar relationship, crossbite, open bite, overbite and overjet. Dental variables such as presence of caries and early loss of teeth were also noted. Informed consent was obtained and all children present at school on the day of the field study were included. A total of 395 children were divided into 2 groups, aged 6 and 9 years.
Results: A high prevalence of caries in the deciduous dentition (30.4% for 6 year olds; 20.6% for 9 year olds) and early loss of primary teeth (11.9% for 6 year olds; 29.4% for 9 year olds) was observed. A large percentage of children had crossbite in the anterior or posterior segments, or both. Open bites were also a common finding. Future orthodontic problems were identified in 28% of this population by using the modified IPION. No statistically significant differences (p > 0.05) were found between sexes or age groups using the x2 test.
Conclusions: Most of the developing malocclusions identified in this study would be amenable to interceptive orthodontics, consisting of space maintenance, crossbite correction and arch expansion.
MeSH Key Words: Canada; malocclusion/prevention & control; orthodontics, interceptive; orthodontics,Reply to this article | View replies 
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