Dental General a6543bd1 Setting time of MTA is: A 60 + - 5 minutes B 120 + - 5 minutes C 165 + - 5 minutes D 30 + - 5 minutes High-Yield Explanation Mineral trioxide aggregate (MTA) was developed by Dr Torabinejad. Setting time is 2 hours and 45 minutes. Ref : Textbook of endodontics, Nisha Garg and Amit Garg, 3rd edition, pg no:551