336 is not an appropriate score to get a college through All India quota. Through all India quota the cutoffs are usually higher and that is why any score at least less than 560 out of 720 is less. Even for Dental, you need to secure at least 500 marks in Neet if you belong to OBC category. However you can try for state counselling as for state quota candidates the cutoffs are comparatively low and the private medical colleges participate in state counselling so you have chances to get seat in private medical colleges. As you told you belong to Tamilnadu, so going by last year's cutoffs, you have chances to get Dental colleges in Tamil Nadu through Management quota such as Madha Dental College, Ragas Dental College, Tagore Dental College and Hospital, Sri Venkateshwara Dental College and Hospital etc. To get complete list of colleges you can based on your rank use this link http://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

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