| 主权项 |
1. An orthodontic connection tool configured to attach to a screw that has been embedded in a bone in an oral cavity an upper structural body to which an orthodontic tool is fixed, the orthodontic connection tool comprising:
a base plate that has a plurality of locking holes arranged at an equal interval in a lengthwise direction of the base plate and that is configured to engage with the screw; and a structural body fixture that has an engaging portion engaged with an arbitrary locking hole of the plurality of locking holes of the base plate thereof and that is configured to fix the upper structural body in a detachable manner, wherein the screw has an angular head portion in which a cross-sectional shape perpendicular to a screw axial direction is a polygonal shape; the plurality of locking holes of the base plate are angular locking holes arrayed in a plurality that engage the angular head portion of the screw; and the engaging portion of the structural body fixture is an angular engaging portion that engages the angular locking hole from an upper surface side of the base plate, wherein the structural body fixture has a locking member that restricts movement of the angular engaging portion in a direction of slipping out with respect to the angular locking hole, and wherein the structural body fixture is cylindrical and has a female thread portion that is formed in an inner periphery; the locking member has slits that extend upward in a vertical direction from a lower end of the angular engaging portion, and a male screw that is threadably mounted in the female thread portion; and in a state of the male screw being threadably mounted in the female thread portion, the angular engaging portion expands in diameter. |
