Hey there, 

As per your query I would like to tell to tell you that according to last year least cuttoff marks for getting admission in reputed government dental college is 400-450marks. 

As per year the cuttoff marks varies depending upon the number of students appearing in the exam and the difficulty level of exam papers. 

so the cuttoff marks fluctuations are unpredictable. 

For predicted your chances to getting admission in government dental college. click upon The link mentioned below:

http://www.medicine.careers360.com/neet-college-predictor. 

Hopefully it's will usefull to you. 

GOOD LUCK. 

Dear candidate,
Colleges is totally depend on the marks you got and the rank. Different states have their own criteria for seats to allote. Under state quota the 85 percent reservation for state students and under all india quota the 15 seats for the other state students.

As you have not mentioned about any state, its difficult to say about any college with any information. Very less chance of getting government dental college.

For that here I am providing you with the link of our site portal to predict your college by just mentioning your information for the college and know you applicable colleges.

Follow the below link to predict your college:
https://medicine.careers360.com/neet-college-predictor

Hope this information helps you to get college details.  
Thank you