If I get 390 marks in neet exam then could I get admission in any bds government college??

Hello student,
You have not mentioned which category or state you belong to. With a score of 390, you have chances of procuring a seat in the government dental colleges, but it depends on your category. For example, With this score, you have chances of procuring a seat in the colleges of Karnataka while it is not so in the case of states like TamilNadu for which the scores are extremely high even in private colleges. However you can go through the following link to know about the cut off's and ranks for the previous years and calculate your chances of selection
https://medicine.careers360.com/articles/neet-cut-off
Good luck