| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a disadvantage of easy detachment from a root canal by softening the hardness of the tip of a work portion and improve the durability, in a root canal treatment tool treating the root canal. <P>SOLUTION: A reamer A is the root canal treatment tool that is formed in a shape of a rod and has a work portion 4 formed in a predetermined length from a tip 3 and a shank 5 formed in a manner continuous with the work portion 4. The work portion 4 has a shape memory part 6 having a shape memory characteristic in a range of a predetermined length from the tip 3 and a superelastic part 7 having a superelastic characteristic in a remaining portion. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
