Device for producing openings in bones in the form of a bone lid used in surgery and in dentistry comprises cutting devices which are guided along a hypotrochoid

摘要

Device for producing openings in bones in the form of a bone lid comprises cutting devices (4a, 4b, 4c, 4d, 4e) which are guided along a hypotrochoid whose shape is determined by the radius of a fixed circle, the radius of an unwinding circle and the distance of a curve-generating point from the middle point of the unwinding circle. Preferred Features: The ratio of the radius of the fixed circle and the radius of the unwinding circle is 3, 4, 5, 6, 7, or 8.