Using 65 students of the hygiene school attached to Matsumoto Dental College (35 first-year students, 30 second-year students) as subjects, we performed an investigation into the different physical sensations produced when using 4 trial toothbrushes and 4 different toothbrushing methods. The conclusions are as follows: 1. "Length of brush": There was a tendency to reply that the length of brush seemed slightly shorter when the students brushed with the Roll method, rather than the other three methods. 2. "Stiffness of filaments": There was a tendency to reply that the bristle was much harder when the students brushed with methods from Group B (Methods that primarily use the tip of the bristle) than with methods from Group A (Methods which use the side of the bristle). 3. "Tooth brush wear": A large percentage of students replied that the bristle was more durable when using methods from Group B rather than Group A. 4. "Physical sensation on tooth and gingiva": Brush M and the Open-tufted brush, both classified as "medium" stiffness, were preferred. 5. "Physical sensation of holding the handle": 80-90% of the students, regardless of the toothbrushing method employed, liked the handles of the brushes
