Caries is a common oral and dental disease. The main etiology of caries is plaque.Chewing fibrous fruits can prevent plaque accumulation, including Manalagi applesand Fuji apples. The purpose of this study was to determine the differences in theeffectiveness of consuming manalagi apples with fuji apples on the reduction of theplaque index in Madrasah Aliyah Al-Hidayah students. This type of research is aquasi-experimental design with pre test and post test control group. Total sample was32

more »

... nts aged 16-18. Data were analyzed by statistical test T Test. Based on theresults of the paired t test statistical test, it was found that the average plaque indexbefore chewing an apple was 0.63 ± 0.42 after 0.26 ± 0.26 with a mean of 0.37 ± 0.16.Meanwhile, the plaque index before chewing on Fuji apples was 1.01 ± 0.59 after 0.87± 0.54 with a mean 0.14 ± 0.05. The results of the independent statistical t testshowed that the value of p = 0.001, which means that there is a difference in chewingManalagi apples with Fuji apples to decrease the plaque index. The conclusion of thisstudy is that consuming manalagi apples is more effective than fuji apples in reducingthe plaque index