| 主权项 |
1. A screw channel directing device for a dental superstructure, comprising:
a screw channel part and an implant cooperating part, said screw channel part comprising:
a distal end and a proximal end, the proximal end constructed to couple with the implant cooperating part; anda screw member seat with an elongated screw hole in the proximal end, wherein the proximal end of the screw channel part is bowl shaped, such that the inner bottom surface has a concave shape and its outer bottom surface has a convex shape, and wherein said implant cooperating part comprises:
a collar-shaped lower implant cooperating part to be connected to a dental implant, the lower implant cooperating part comprising a distal concave seat, anda collar-shaped upper implant cooperating part, said upper implant cooperating part comprising a proximal convex bottom surface with a radius corresponding to the radius of the concave seat of the lower implant cooperating part to form a first ball joint and said upper implant cooperating part having a distal concave seat with a radius corresponding to the radius of the outer bottom surface of the screw channel part to form a second ball joint, wherein the second ball joint has a radius that is different from a radius of the first ball joint, wherein the two ball joints are constructed such that the upper implant cooperating part and the screw channel part are capable of being tilted in relation to a central axis of the lower implant cooperating part and the dental implant when a screw member is engaged with the dental implant. |
