Background: Developmental dental hard tissue anomalies are often associated with oral health problems. This\nstudy determined the clinical prevalence of developmental dental hard tissue anomalies in the permanent dentition\nof children resident in southwestern Nigeria and its association with dental caries and poor oral hygiene status.\nMethods: This was a cross-sectional study recruiting 1565 school children, 12 to 15 year old attending schools in\nIbadan, Oyo State and Ile-Ife, Osun State. All eligible study participants had oral examinations conducted to\ndetermine presence of developmental hard dental tissue anomalies, caries and oral hygiene status. The prevalence of\ndevelopmental dental hard tissue anomalies was determined. Logistic Poisson regression was used to determine the\nassociation of between developmental dental hard tissue anomalies, caries and oral hygiene status.\nResults: Only 65 (4.2 %) children had clinically diagnosed developmental dental hard tissue anomalies. The most\nprevalent anomaly was enamel hypoplasia (2.2 %). More females (p = 0.003) and more children with middle\nsocioeconomic class (p = 0.001) had enamel hypoplasia. The probability of having poor oral hygiene was\nsignificantly increased for children with developmental dental anomalies (APR: 0.07; 95 % CI: 0.03 ââ?¬â?? 0.12;\np = 0.002). The probability of having caries was insignificantly increased for children with developmental dental\nhard tissue anomalies (APR: 0.005; 95 % CI: âË?â??0.03 ââ?¬â?? 0.04; p = 0.08).\nConclusion: The most prevalence clinically detectable developmental dental hard tissue anomalies for the study\npopulation was enamel hypoplasia. The presence of developmental dental hard tissue anomalies significantly\nincreased the chances of having poor oral hygiene but not caries. Further studies are required to understand if\npoor oral hygiene is associated with dental caries in children with developmental dental hard tissue anomalies.
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