Overjet and Caries experience in Nigerian School Children

Title of Paper Overjet and Caries experience in Nigerian School Children
Authors Taiwo O.O, Dhlakama GH, Jalo HP.
Year of Publication/Presentation 2012
Publication Details/Conference Venue 90th IADR General Session & Exhibition of the International Association of Dental Research June 20th to 23rd 2012, Iguacu Falls, Brazil
Research Area Dental Caries
Objective: Dental caries is a complex disease process that afflicts a large proportion of the world’s population, regardless of gender, age and ethnicity. The process of dental caries among others is dependent upon biological factors which include saliva, enamel structure, shape, size and the arrangement of the teeth. The objective of this study was to determine the association between overjet and caries experience in 12 years old Nigerian students.
Method: The sample size included 719 school children from 36 public schools. They were proportionately selected through a multistage sampling technique. Caries experience (DMFT) and overjet were evaluated clinically by one examiner (intra-examiner reliability was 0.852 by Cronbach’s Alpha test). Overjet was considered a risk when its values were ≥5mm. Diagnosis of caries was at cavitations level. The children answered a structured questionnaire on sociodemographics and oral health behaviours. Analysis was by the use of SPSS V 16.0. Pearson’s Chi-squared test was used to test for association between variables. P values <0.05 was considered statistically significant. Result: There were 411(57.2%) boys. 54.2% (390) students were from the urban areas. Caries experience was 11.4% and 89 (12.4%) students had overjet ≥5mm. Overjet was more prevalent among males (P = 0.003, OR = 0.919, 95% CI = 0.871, 0.969). Dental caries experience was comparable (51%, 49%) in the rural and urban areas (p = 0.292). There was no significant association between caries experience and overjet either by gender or location (p > 0.05). The odds of having dental caries in those with overjet ≥5mm was 1.01, 95% CI = 0.545, 1.897.
Conclusion: There was no association between overjet and caries experience in the studied student population. Caries experience was alike in the urban and rural locations and being male was associated with a higher probability of having overjet ≥5mm.