A pilot oral health epidemiological survey using WHO assessment forms was conducted in Yugoslavia in the year 1986. The study population consisted of 2600 persons aged 6, 12, 15, 18, 35-44, and over 65 yr. The survey included 22 towns (11 developed and 11 underdeveloped) in the six Republics and two Provinces of Yugoslavia. The results showed the prevalence of dental caries in the Yugoslav population to be very high (98.7% in 12-yr-olds). The mean decayed, missing, and filled teeth (DMF) scores were as follows: 6.1 at age 12 yr, 9.6 at age 15, 10.9 at age 18, 18.0 at age 35-44, and 28.0 in persons aged over 65 yr. Assessment of the periodontal status showed calculus to be the predominant disorder in the age groups 18 and 35-44 yr, while loss of sextants prevailed in persons aged over 65 yr.
Caries is a disease of multi-causal etiology, where environmental factors such as oral hygiene, nutrition and saliva have great importance. Aim: The aim of this study was to examine the correlation between dental health status and environmental factors: oral hygiene, nutrition, salivary pH and the flow rate of stimulated saliva in children. Materials and methods: Research was done in children with caries and in children with healthy teeth of both gender and the age of 12. Questionnaire method was used to obtain data about the time of consuming refined carbohydrates and oral hygiene. Oral hygiene level was determined using the Silness-loe plaque index and saliva was analyzed by measuring the flow rate of stimulated saliva, as well as measuring pH of non-stimulated and stimulated saliva. Results: Examining the correlation of seven analyzed characteristics it was possible to determine the presence of 14 (66,7%) correlations out of 21 possible, with statistical significance and various p-values starting from p=0.038 (tau-b=0.229) up to p<0.001 (r=0.667). Out of seven analyzed characteristics, the time of carbohydrate consumption, the presence of caries (group) and pH of non-stimulated saliva are predominantly correlated with other characteristics. Conclusion: The results of this examination show caries appearance in children to be in highly significant correlation with frequency of carbohydrate consumption, plaque index and pH values of non-stimulated saliva. In other words, children with caries consume carbohydrates often between meals, have high plaque index and lower pH values of non-stimulated saliva
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