BONE SPREADING DEVICE AND BONE SPREADING SYSTEM

摘要

PROBLEM TO BE SOLVED: To spread a notch while simply preventing backward tilting of a bone.;SOLUTION: A bone spreading device 1 comprises: a pair of swing members 3, 4 connected in a swingable manner around a shaft line A of a hinge part 2; a pair of opening/closing members 5, 6 that are to be inserted into a notch formed on a bone and be separated by relative swinging around shaft lines B1, B2 of the swing members 3, 4 to spread the notch; and opening/closing mechanisms 7, 8 for relatively swinging the swing members 3, 4 around the shaft line A. The respective opening/closing members 5, 6 comprise contact faces 5b, 6b that are to come into contact with cut sections of the bone in a state of being inserted into the notch and have a shape for making a distance between the contact faces 5b, 6b larger on the back side of the bone than on the front side thereof.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2020,JPO&INPIT