Background: Oral health is fundamental to general health and well-being. Sources of oral health information for adults have been examined but documentation of children's sources is limited. Aim: The aim of the following study is to investigate the dental health attitudes, knowledge and practice of school children in Chennai using a questionnaire. Materials and Methods: The subjects for this study were randomly selected from fi ve private and fi ve government schools in the age group of 10-16 years. A total of 592 children were screened, of which 219 were males and 373 were females. Results: Overall the level of knowledge score was statistically signifi cant with P = 0.004. There was statistically signifi cant difference with P = 0.008 when comparing the frequency of brushing the teeth twice per day among the two different age groups. Comparing the various other factors such as gender, type of school and age groups to the visit to the dentist, it was observed that statistically signifi cant difference with P < 0.001) was found when comparing the female children (75.3%) and male children (60.3%) and P = 0.002 observed when comparing the younger and older age group who visited the dentist. Conclusion: The overall level of oral health knowledge among the surveyed children was low.

The results showed that the study group had a statistically significant reduction in the plaque Streptococcus mutans counts than the control group.

Prevalence of MIH was 9.7% in the child population residing in Chennai. Males and females were equally affected. The rate of occurrence and severity of MIH are more in the right mandibular first molar. The severity of MIH is more in molars compared to incisors (P < 0.001) and is more in government schools compared to private schools (P = 0.002).

Supernumerary teeth are those which are additional or in excess of the normal number. They can be either single or multiple, unilateral or bilateral and can be present anywhere in the dental arch with predilection for the premaxilla. Supernumerary teeth are mostly classified on position and form. Timing of surgical intervention of supernumerary teeth has been controversial with various authors having different opinions. Hence a new decision support system is put forward which can help in the treatment planning of supernumerary teeth.

Pediatric asthma patients with severe, early onset asthma are at increased risk of dental enamel defects and therefore require priority dental care.