1989 年 38 巻 1 号 p. 101-106
As time passes, spur formation may occur at the damaged ring apophysis part in the lumbar disc herniation in teenagers. Thus, the formed spur was comparatively reviewed with the so-called traction spur observed in adults. As a result, even in the so-called traction spur, there was much damage at the ring apophysis site in young people.