| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic tray for taking an impression of a local area, which prevents lift or separation from the tray for an impression material after curing, and which is used when the impression of the local area in the oral cavity is taken.SOLUTION: A plastic tray for an impression of a local area includes: an outer wall 2 which assumes a gently curved shape, which has a length corresponding to at least three continuous teeth, which is erected on the outside of a curvature of a bottom 1 forming a plane with almost the same width, and the height of which is gradually decreased on the side of one end to become equal to the height of the bottom 1; and an inner wall 3 which is erected on the inside of the curvature of the bottom 1 and the height of which is gradually decreased on the sides of both ends to become equal to the height of the bottom 1. A rim 4 with a specific height is provided on the side of the bottom 1 along upper ends of the outer and inner walls 2 and 3. Slot-like through-holes 5 with a specific width, which reach the bottom 1 from directly below the rim 4, are formed at almost regular intervals in a specific gap in the outer and inner walls 2 and 3. A circular through-hole 6 with a specific diameter is formed in a specific position in the bottom 1. Slot-like end-side through-holes 7 with a specific width and a specific length are provided at both the ends of the bottom 1 in such a manner as to be perpendicular to the axial direction of the bottom 1, respectively. |
