Assessment of permanent teeth eruption in a sample of Egyptian primary school children

Abstract Background Parents have often showed their interest in the tooth eruption timing. However, the literature suggests that tooth emergence standards should be derived from the population they are to be applied because emergence related factors may vary considerably in dentition. Timing of teeth emergence differs from population to population and can be affected by genetic and environmental factors. Both ethnic origin and gender can be attributed to genetic factors. Objectives The purpose of the present study was to find out the statistical correlation between age, sex and stature to eruption of permanent teeth in a sample of primary school children age (6-<13 years). Methodology: The present study was a cross sectional study that was conducted on 700 healthy school children aged 6 – <13 years selected from different primary schools in two governorates in Egypt; Behera governorate and Giza governorate. Assessment of age, sex and stature was performed through socio – demographic data, anthropometric measures and sequence of permanent teeth eruption. Results The first molars, central incisors, upper lateral incisors, lower canines, second premolars and second molars erupted earlier in Behera (Rural) children. The mandibular teeth tended to precede the maxillary teeth. In Giza (urban) children most of the teeth erupted earlier in girls. In Behera (Rural) children most of the teeth erupted earlier in boys. Conclusion Most of teeth erupted earlier in Behera (rural) and the majority erupted earlier in girls in Giza (urban) and in boys in Behera (rural).