CAJ | 학술논문

目的：通过测量经骶1-2侧块螺钉与骶1前外骶骨翼螺钉的钉道长度和最大拔出力，比较两者的固定效果。方法对27例（男14例，女13例）骶尾椎CT检查的影像学资料进行三维重建，利用Advantage worksta-tion 4．2后处理工作站软件测量经骶1-2侧块螺钉与骶1前外骶骨翼螺钉的钉道长度。取8具甲醛溶液固定的湿润成人骶骨标本，采用双能X线吸收测定仪测定骶1椎体骨密度，记录其平均值。在同一骶骨标本左右侧分别随机植入经骶1-2侧块螺钉和骶1前外骶骨翼螺钉。将标本固定于858型MTS材料试验机上，对螺钉施加轴向拔出力，计算最大拔出力。结果经骶1-2侧块螺钉平均钉道长度为（53．78±3．02） mm，骶1前外骶骨翼螺钉为（44．73±2．59）mm，差异有统计学意义（P＜0．05）。经骶1-2侧块螺钉即刻平均最大拔出力为（379．62±73．10） N，骶1前外骶骨翼螺钉为（230．62±98．52）N，差异有统计学意义（P＜0．05）。结论经骶1-2侧块螺钉固定的钉道长度及最大拔出力均优于骶1前外骶骨翼螺钉，可作为临床上一种有效的选择。
목적：통과측량경저1-2측괴라정여저1전외저골익라정적정도장도화최대발출력，비교량자적고정효과。방법대27례（남14례，녀13례）저미추CT검사적영상학자료진행삼유중건，이용Advantage worksta-tion 4．2후처리공작참연건측량경저1-2측괴라정여저1전외저골익라정적정도장도。취8구갑철용액고정적습윤성인저골표본，채용쌍능X선흡수측정의측정저1추체골밀도，기록기평균치。재동일저골표본좌우측분별수궤식입경저1-2측괴라정화저1전외저골익라정。장표본고정우858형MTS재료시험궤상，대라정시가축향발출력，계산최대발출력。결과경저1-2측괴라정평균정도장도위（53．78±3．02） mm，저1전외저골익라정위（44．73±2．59）mm，차이유통계학의의（P＜0．05）。경저1-2측괴라정즉각평균최대발출력위（379．62±73．10） N，저1전외저골익라정위（230．62±98．52）N，차이유통계학의의（P＜0．05）。결론경저1-2측괴라정고정적정도장도급최대발출력균우우저1전외저골익라정，가작위림상상일충유효적선택。
Objective To compare the effects of S 1-2 lateral mass screws and anterolateral S 1 sacrum alae screws by measuring the maximal length and pull -out force.Methods CT images of the sacrum were collected from 27 pa-tients (14 men and 13 women) to perform three-dimensional reconstruction .Using the Advantage Workstation ( AW) 4.2 software, the maximal lengths were measured for S1-2 lateral mass screws and anterolateral S1 sacrum alae screws. Eight adult cadaver specimens fixed in formalin were adopted to examine the bone mineral density of S 1 vertebral using dual-energy x-ray absorptiometry (DEXA).After randomly implanted with S1-2 lateral mass screws and anterolater-al S1 sacrum alae screws on both sides , the specimens were placed on a MTS 858 bio-nix testing machine to record the maximal pull-out force .Results Statistical differences were found in the average maximal length between S 1-2 lateral mass screws [(53.78 ±3.02) mm, P<0.05] and anterolateral S1 sacrum alae screws [(44.73 ±2.59) mm, P<0.05)].The average maximal pull -out force was 379.62 ±73.10 N for S1-2 lateral mass screws, which was signifi-cantly different from that of anterolateral S1 sacrum alae screws [(230.62 ±98.52) N, P<0.05].Conclusion S1-2 lateral mass screws are superior to anterolateral S 1 sacrum alae screws in terms of the maximal length and pull -out force, indicating its promising use in clinical setting .