The Frequency of Y-pattern Dental Traits on Lower Molar of Javanese Deutromalayid

In the study of dental Anthropology, human dentition varies according to the dental traits. There are characteristics of dental traits in each population that are useful for knowing the possibility of origin. Geographically, the Sunda-Pacific region is occupied by populations characterizing Sundadonts dental traits, which are part of the Mongoloid, and Sahul-Pacific is populated by Austromelanesid populations. The island of Java has a majority population of Javanese, which in terms of physical characteristics - skin color, hair type and color, epicantus, etc. - are included in the Deutromalayid group, which is also part of the Mongoloid. This research studied the frequency of Y-pattern or Dryopithecus pattern occurrence in the lower molars of Javanese. The study was conducted by observing 76 individuals, consisting of 71 dental impression collected by the second researcher, and 5 skulls belonging to the Laboratory of Anatomy and Histology of Medical School, Universitas Airlangga. The researchers chose a sample of which the occlusal surface could be observed to see the Y-pattern on the crown surface of the tooth. The result of this study indicates that Y-pattern molar is frequently found on the first molars. We compared the lower second molar to the frequencies of other populations studied by Scott & Turner, and we conclude that Javanese Deuteromalayid has frequency that is similar to Taiwan Aborigenese and South American Indian.