AN EXPERIMENTAL-STUDY ON TRANSPEDICULAR SCREW FIXATION IN RELATION TO OSTEOPOROSIS OF THE LUMBAR SPINE

被引：303

作者：

SOSHI, S

SHIBA, R

KONDO, H

MUROTA, K

机构：

[1] Department of Orthopaedic Surgery, Jikei University School of Medicine, Tokyo

来源：

SPINE | 1991年 / 16卷 / 11期

关键词：

LUMBAR SPINE; PEDICLE SCREW; PULL-OUT TEST; OSTEOPOROSIS; BONE CEMENT;

D O I：

10.1097/00007632-199111000-00015

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

In order to elucidate the relationship between the severity of osteoporosis and the fixation strength of a pedicle screw, screw pull-out tests were performed using cadaveric lumbar vertebrae. The severity of osteoporosis was evaluated by the Jikei osteoporosis grading scale (Jikei method), bone mineral density, and microdensitometry. When a 7.0-mm screw was used, the pull-out force of the screw was 1,056.4 N in the normal group (as determined by the Jikei method), while it was 495.6 N in the Grade I osteoporosis and 269.5 N in the Grade II osteoporosis groups, respectively. There were also positive correlations between the pull-out force and bone mineral density and each parameter of the microdensitometry method. When bone cement was used in an osteoporotic vertebra, twofold stronger pull-out force was obtained in comparison to that obtained without bone cement.

引用

页码：1335 / 1341

页数：7

共 18 条

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