Tartar vs. plaque Tartar is hardened plaque. If you don’t remove plaque regularly, it will turn into tartar. At this point, you can’t brush or floss it away. Only a dentist or hygienist can remove it. Dental calculus is another name for tartar. Tartar might be off-white or yellow at first. But after a while, it will take on the color of whatever foods or substances you consume. For example, certain things can make tartar look darker, including: Coffee. Tea. Red wine. Smoking. Chewing tobacco.