hubungan kadar urea saliva terhadap derajat keasaman (ph) saliva pada anak usia 12-15 tahun

Introduction: One of the dental disease in the oral cavity that often experience by society are caries. Caries is one of the hard tooth tissue disease that can touch enamel, dentin, and  sementum. One of the factor that affect caries process is saliva. Urea is one of the organic composition that compose saliva. Urea in salive plays as buffer capacity and the pH saliva  adjustment. Methods: This study is an analytic observational with cross sectional approach, this study are conducted in Daarul ‘Ilmi Islamic boarding school with 19 subject of 12-15 years old child. The data are obtained from the examination of urea saliva level and pH saliva in child. The level of urea saliva are measured  using spectrophotometer tools and the pH saliva are measured using pH meter. The Shapiro-wilkare used to deterime the data normality, continue with Leuvenetest to determinde the data  homogeneity data. Data are analyzed using Pearson test to determine the relation of urea level in saliva against the pH  saliva. Results: According the data analysis, the data are in normal distribution and homogeneous. The research result are obtain average of urea level in urea sample is 13,45 mg/dl, and the average of pH saliva sampelis 7,15. The result of  Pearsonstatistic testare obtain p value of = 0,000, with the  positive correlation level of 0,902. Conclusion: The conclusion of this study are note that there are relation between the urea level in saliva against pH salive.  This are proven from the Pearson test result with significance value of 0.000 (p< 0.05). Keywords: Caries, pH Saliva, Urea Saliva.