Role of Bacterial Types and Odor for Early Detection Accuracy of Bacteria with Gas Array

Periodontal disease, especially dental caries, is the most common disease that occurs in the oral cavity. Poor awareness of oral hygiene leads to tooth decay that usually ends with tooth extraction. Dental caries is caused by the accumulation of microbes, including bacteria in the oral cavity. The electronic nose is one ofthe methods that can be used for early detection of oral and dental diseases with gas array sensors. This article discusses the role of bacterial types and odor for the early detection accuracy of bacteria with gas array sensors. Study of e-nose application to detect the odor-based bacterial growth, taken from Pubmed, Web of Science, and Scopus. The results of article reviews from reputable internationaljournals showed that the TGS Metal Oxide Sensor (MOS) was able to identify gases formed by bacteria with more than 95% accuracy. In its implementation, the PCA computational analysis method is proven to be able to distinguish gases produced by bacteria properly. E-nose, with various computational analysis methods, has shown to be able to identify gases emitted by various bacterial and odors with a reasonably high accuracy value, namely in the range 80-90%.