Hello aspirant, as you mentioned that your rank in NEET 2020 (I am assuming as you didn't mention the exam) is 494869. You also haven't mentioned your category so I am assuming general category boy. According to thes specifications you are not eligible for a seat in any of the Government medical seats. Below mentioned are some top private colleges which you can get admission into with your rank -

1.Vinayaka Missions Sankarachariyar Dental College, Salem

2.Manipal College of Dental Sciences, Mangalore

3 .Santosh Medical College And Hospital, Santosh University

4.BVDU Dental College And Hospital, Navi Mumbai

5.A.B. Shetty Memorial Institute of Dental Sciences

All the best