Follow-up Study on Instability of Lumbal Vertebrae

概要

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The instability of lumbal vertebrae is classified into three types; Type A-an excess tilting movement of the vertebral body, Type B-an anterior or posterior displacement of the vertebral body and Type C-a combination of Type A and Type B instability.X-ray films of 18 patients with instability of the lumbal vertebrae were traced and compared with those of 6 or 7 years ago.The results were as follows:1) The development and progression of Type B imstability were anatomicaly related to the sagital plane facet, as well as, Type A to the oblique plane facet.2) Osteoarthrotic changes of the intervertebral joint increased in almost all cases of Type B instability during 6 or 7 years, but in Type A instability OA changes were observed only in the cases with increased instability.3) The pedicle-facet angle had no relationship with the increasing of the vertebral instability.
西日本整形・災害外科学会の論文