Introduction. Saliva plays an important role in maintaining oral health. Its buffer capacity helps neutralise acidic products from food, drinks and dental plaque. Saliva composition, quantitative and qualitative properties, such as acidity, are associated with the occurrence of dental caries, non-carious lesions and periodontitis. The aim of the study was to examine the change in salivary acidity after taking carbonated mineral water and sugar-sweetened carbonated soda in subjects aged 18 to 25 years. Materials and method. The study research was conducted at the Dentistry Clinic of Vojvodina on 30 adult subjects. Salivary acidity was measured with a digital pH meter before, and 5, 10 and 20 minutes after taking 200 ml of carbonated mineral water and 200 ml of sugar-sweetened carbonated soda. The obtained results were statistically processed by mixed, combined analysis of variance. Results. Consumption of carbonated mineral water and sugar-sweetened carbonated soda led to a change in salivary acidity in the examined time intervals. Carbonated mineral water reduced the salivary acidity, and after 20 minutes the acidity recovers reaching levels close to the initial pH value. After taking sugar-sweetened carbonated soda, the salivary pH value dropped. It reached the lowest mean value 5 and 10 minutes after taking the beverage, and then increased slightly without reaching the initial value. In some subjects, the minimum value of the salivary pH obtained was below the value considered critical for the occurrence of enamel and dentin demineralisation. Conclusion. Carbonated mineral water and sugar-sweetened carbonated soda affected the salivary pH value within a period of 20 minutes after consumption. Consuming sugar-sweetened carbonated soda can have adverse effects on oral health.
Introduction. Class III malocclusions are characterized by a more prominent lower jaw compared to the upper jaw and a Class III skeletal and dentoalveolar relationship according to Angle. In the scientific literature, there is a small amount of data on the morphological characteristics of malocclusion in different populations, so there is a justified need to examine the morphological characteristics of Class III malocclusion in the population of Vojvodina. The aim of this study was to determine the morphological characteristics of Class III malocclusions, to compare them with the average values found in the scientific literature, and to determine the correlation between the examined parameters of the upper and lower jaw. Material and Methods. This retrospective study included subjects with Class III dentoalveolar malocclusion treated at the Dentistry Clinic of Vojvodina in Novi Sad. The method of random selection was used to select 50 study models. The data were statistically processed with a significance level of p < 0.05. Results. The obtained results indicate that the sum of crown width of the mandibular incisors, the length of the mandibular dental arch, and the mandibular apical base in subjects with Class III malocclusion are higher than the average values in the general population. The values of the posterior width of the maxillary dental arch in the examined group are lower compared to the average values in the general population. Conclusion. Subjects with Class III malocclusion present with a greater mandibular dental arch in regard to the maxillary dental arch.
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