The tongue is a vital organ that performs multiple actions such as articulation of speech, perception of taste, and formation of the food bolus. It is well protected from the external environment and enclosed in the oral cavity with palate on the superior aspect, floor of the mouth on the inferior aspect, mandibular teeth on the lateral aspects, pharyngeal region posteriorly, and the lips anteriorly. Biometric authentication is a method of personal identification and has gained popularity in recent years.
The necessity for security in cases of bank details, transactions, etc., has propelled the research in the field of biometrics. In biometric authentication, the input sample is compared against a sample template to identify the person. Fingerprint, palm print, iris scan, signature scan, etc., are the different biometric methods in use. Recently, there has been an increased interest in tongue prints as a biometric tool. This review highlights the uniqueness of tongue prints and their advantages over other biometric methods. Different methods of tongue print collection, classification, and its potential application in the field of forensic dentistry are also discussed.