| 摘要 |
PROBLEM TO BE SOLVED: To obtain a suture thread to be hardly cut with excellent initial fixing property by providing holding parts which are formed on both side surfaces to hold divided vertebral arches, a through-hole having openings inside the both holding parts and recessed parts formed in each corner part made by means of each side surface having the holding part and a surface at a rear side. SOLUTION: One of the vertebral arches is cut in a side part at first after spreading the vertebra in the usage method of a vertebral canal enlarging operation spacer 10. Then a suture thread through-hole is formed in the cut both vertebral arches. Then the suture thread is put through the through-hole of the both vertebral arch parts and the through-hole 17 of the spacer 10 and, then, the spacer 10 is inserted while holding the tip parts of the arch parts between the holding parts 13 and 14. In this case, the suture thread is adjusted to be engaged with the recessed parts 18 and 19 of the spacer 10. Then the suture thread is tied-up to fix the spacer 10. In a result, the initial fixing property of the spacer 10 becomes excellent and also the suture thread is hardly cut so that the spacer 10 is not removed, moved and made to fall.
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