Dear applicant though the cut off changes every year based on the number of students appeared in the exam, the difficulty level of the exam and the orientation of vacant seats but if an assumption is made on your 493 marks and BC-B category, you have possibilities of getting free seats in certain private colleges, but BDS seats are possibile in the SVU region like,

1.CKS Theja Institute of Dental Sciences and Research, Tirupati

2. Narayana College of Dental Sciences etc.

But yes the cut off can vary, to know your best possible colleges, use our NEET UG college predictor to predict the best colleges based on your merit rank

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

Good luck!!!