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 Indian J Med Microbiol  
 

Figure 1: Illustration of the orthodontic dental cast in occlusal view and the respective palatal rugae. The palatal rugae were classified according to a system previously proposed in the scientific literature.[11] According to the system, the palatal rugae on the right of the observer (left side of the dental cast) are described as “initial” ( first fold) and “complementary” (remaining folds). Similarly, the contralateral rugae are described as “subinitial” ( first fold) and “subcomplementary” (remaining folds). Based on their shape, the initial and subinitial rugae are coded with a capital letter, whereas the complementary and subcomplementary rugae are coded with a number from 0 to 9 [Table 2]. The combination of letters and numbers culminate in individual palatal rugae patterns coded for each person

Figure 1: Illustration of the orthodontic dental cast in occlusal view and the respective palatal rugae. The palatal rugae were classified according to a system previously proposed in the scientific literature.<sup>[11]</sup> According to the system, the palatal rugae on the right of the observer (left side of the dental cast) are described as “initial” ( first fold) and “complementary” (remaining folds). Similarly, the contralateral rugae are described as “subinitial” ( first fold) and “subcomplementary” (remaining folds). Based on their shape, the initial and subinitial rugae are coded with a capital letter, whereas the complementary and subcomplementary rugae are coded with a number from 0 to 9 [Table 2]. The combination of letters and numbers culminate in individual palatal rugae patterns coded for each person