| 摘要 |
The suture expansion device comprises a central stretching screw support; on either side of it, a right and a left fixing means support for fixing to the right and, respectively, the left section of the jaw; and two stretching screws which are parallel to one another extending between the fixing means supports and screwed in the stretching screw support. The stretching screws can be screwed outwards in mutually opposed directions out of the stretching screw support in order to push the fixing means supports apart. For each fixing means support a guide system is provided that prevents rotation of the relevant fixing means support a guide system is provided that prevents rotation of the relevant fixing means support relative to the stretching screw support and guides movement of the fixing means support in the longitudinal direction of the stretching screw. The stretching screws are freely rotatable about their longitudinal axes relative to the fixing means supports.
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