Thank you for your question.

Following dental colleges in Karnataka have diploma courses in dental sciences.

M. S. Ramaiah University of Applied Sciences - MSRUAS

Manipal College of Dental Sciences, Mangalore

J.S.S. Dental College and Hospital, JSS Academy of Health sciences

For more details,  visit their website-

https://manipal.edu/mcods-manipal.html

http://www.msruas.ac.in/academics/dental_science

Good luck