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Introduction: Dental evidence can now be employed with sufficient reliability and also as an adjunct in forensic discoveries. Although dental non-metric trait studies have been done before, a very small number of studies have been conducted to comprehend the existence of all traits extensively in an ethnic population Materials and methods: 192 children were examined out of which 94 children between age 5-10yrs who had fully erupted 1st permanent molars that were not cavitated showing a clear occlusal pattern of Tamil Nadu origin only were included. The criteria for determining the groove patterns given by Hellman and Gregory was used. Results: A total of 94 children were included in the study out of which 61 were boys and 32 were girls. A total of 4.3% teeth showed 4+ morphology, 2.6% showed 4Y, 25.43% showed 5+ and 76.32% showed 5Y type of occlusal morphology. Conclusions: The present study was done in a private hospital in the city of Chennai, Tamil Nadu and found that the most common occlusal configuration was 5Y. This shows they are still very similar to our ancestors and not much of evolutionary advancement has taken place.