Dear Kaushik, 450 is a good score. Going through and analysing the previous year cut offs, you have a chance to get a seat in BDS in government college. However, the cut offs varies from state to state in case of admission through state counseling. So, your admission will also depend on which state domicile you belong to.

Hope, you're cleared with your doubt now. In case of any further doubt, please feel free to consult us.