| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the force to polish the tooth surfaces constant so as to prevent the loss of elasticity and to decrease the burden on the gums by excessive force and to make a joint part finer so as to enable easy polishing to all the corners of the teeth by using a superelastic alloy subjected to a superelastic treatment in the joint part for a gripping part and polishing part of a brush. SOLUTION: The tooth brush 10 comprises the gripping part 2a, the polishing part 3a and the joint part 1 for joining these parts. The joint part 1 is joined to the gripping part 2a and the polishing part 3a for the teeth to constitute a piece of the tooth brush. These joining is executed by caulking or an adhesive. The polishing part 3a is formed by coating the superelastic alloy 4 existing at the center by an elastic member 5. A resin or rubber, etc., are used for the elastic member 5. The superelastic alloy 4 is black as it is or is gray as a result of descaling and is inadequate in terms of a design or for use in the mouth. The superelastic alloy is, thereupon, coated with the resin or rubber, etc., by which the use thereof as the tooth brush is made possible.</p> |
