Differences in Flow Rate and Salivary Acidity Level in Soft Drink Drinkers and Milk Drinkers (Systematic Literature Review)

Saliva is a complex fluid in the oral cavity, consisting of a mixture of major and minor salivary gland secretions with a salivary pH ranging from 6.5-7.4. Several factors cause changes in salivary pH, including salivary flow rate, oral flora normal, salivary buffer capacity, and food and beverages consumed; one of which is milk and soft drinks. Milk provides a wide variety of nutrients, including proteins, minerals, and vitamins. Alcohol is not present in soft drinks, which come in liquid or powder form and contain food ingredients and other additives, both natural and artificial, packed and ready for consumption. In this study, saliva flow rates and pH levels were compared between milk drinkers and soft drink consumers to see how they differed. The research method used is Systematic Literature Review (SLR) with 3 journal databases namely PubMed, Science Direct and Google Schoolar. Based on the literature search, 322 literatures were obtained, which were checked for duplication of articles with Mendeley software. Screening was carried out on the literature based on the title and abstract so that 14 literatures were obtained that met the eligibility and were analyzed further. The results show that there are two literatures stating that there is an increase in salivary flow rate in soft drink and milk drinkers. Seven literatures state that there is an increase in the degree of salivary acidity in soft drink drinkers. There was a decrease in the level of salivary acidity in milk drinkers, according to five pieces of literature. The conclusion shows that the condition of salivary flow rate in soft drink and milk drinkers increases. Soft drink drinkers have more salivary acidity than milk drinkers do.