| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved screw channel directing device.SOLUTION: A screw channel directing device 50 for a dental superstructure comprises: a screw channel part 51; and an implant cooperating part 52A and 52B, the former having a screw member seat 54 with a screw hole in the proximal end. The implant cooperating part comprises: a collar-shaped lower implant cooperating part 52A to be connected to a dental implant 60; and a collar-shaped upper implant cooperating part 52B. The lower implant cooperating part has a distal concave seat 58, and the upper implant cooperating part 52B has a proximal convex bottom surface 57 with a radius corresponding to the radius of the concave seat of the lower implant cooperating part to form a first ball joint 57 and 58. The upper implant cooperating part has a distal concave seat 56 with a radius corresponding to the radius of the outer bottom surface 55 of the screw channel part to form a second ball joint 55 and 56. |
