Trisa is the Worlds best toothbrush brand which brings to you and your family a revolutionary brushing solutions with best in class technology to ensure the best of oral health. This flex head hard has flexing sides that adjust to the unique curves and contours of your teeth. including gumline for superior cleaning vs. an ordinary manual toothbrush with regular use. Because of its flexibility. Pro Health Smartflex is gentle on gums too. For complete oral care. also visit your dentist regularly.