Abstract
The purpose of this study was to prove the form of lumbar facet, concerning in narrowing canal in degenerative lumbar spinal canal stenosis. Using contact microradiogram (CMR) and decalcified section by Yoshiki's method, trabecular bone tissue was observed histologicaly and histomorphometricaly. The results were summarized as follows.: 1) Regardless of facet levels, angles, forms and cutting levels of lumbar facet, trabecular bone showed higher density in neural canal side than extra neural canal side. 2) Decalcified sections of control revealed that tVsp, oVsp in neural canal side were higher than those in extra neural canal side, but MTT had no difference in several areas. 3) In neural canal side of patient, tVsp, oVsp and MTT of superior and inferior articular processes and FrFs of inferior articular process were remarkablly higher than those of control, the other parameters had no discrepancy. 4) In addition, tetracycline double labellings in neural canal side of patient showed active bone formation and calcification. These results suggested the dynamic bone remodeling in neural canal side of lumbar facet in patient.
