CAJ | 학술논문

【目的】采用极限加载实验对滑槽钉生长棒内固定系统与通用脊柱内固定系统的进行比较，为该系统的进一步改进及将来的临床应用提供理论依据。【方法】将新鲜猪脊柱标本12具，共3个胸椎功能单位，随机分成两组，滑槽组（固定螺钉固定标本第3椎体，滑槽螺钉固定标本第1椎体），固定组（固定螺钉固定标本1、3椎体），分别应用通用脊柱内固定系统和滑槽钉生长棒内固定系统测试标本在前屈状态及旋转状态的极限加载。所得数据采用SPSS 18．0软件进行统计学分析。【结果】前屈状态时滑槽组在400 N左右出现钉道松动，固定组在1800 N左右出现钉道松动，两组相比较差异有显著性（ P＜0．05）；旋转状态时滑槽组在5度左右出现钉道松动，固定组在10度左右出现钉道松动，两组相比较差异有显著性（ P ＜0．05）。【结论】滑槽钉生长棒内固定系统的极限加载要小于通用脊柱内固定系统，说明滑槽钉生长棒内固定系统的研究存在一定不足，需进一步优化，增加固定强度。
【목적】채용겁한가재실험대활조정생장봉내고정계통여통용척주내고정계통적진행비교，위해계통적진일보개진급장래적림상응용제공이론의거。【방법】장신선저척주표본12구，공3개흉추공능단위，수궤분성량조，활조조（고정라정고정표본제3추체，활조라정고정표본제1추체），고정조（고정라정고정표본1、3추체），분별응용통용척주내고정계통화활조정생장봉내고정계통측시표본재전굴상태급선전상태적겁한가재。소득수거채용SPSS 18．0연건진행통계학분석。【결과】전굴상태시활조조재400 N좌우출현정도송동，고정조재1800 N좌우출현정도송동，량조상비교차이유현저성（ P＜0．05）；선전상태시활조조재5도좌우출현정도송동，고정조재10도좌우출현정도송동，량조상비교차이유현저성（ P ＜0．05）。【결론】활조정생장봉내고정계통적겁한가재요소우통용척주내고정계통，설명활조정생장봉내고정계통적연구존재일정불족，수진일보우화，증가고정강도。
To compare between the growing rod internal fixation system of sliding pedicle screw and the universal spine system(USS) by the limit loading test in order to provide the basis for further improvement and clinical application of the system in the future .[Methods] A total of 12 spine specimens of fresh porcine(3 thoracic vertebra functional units ) were randomly divided into the sliding group (attachment screws in the 3rd vertebra and sliding pedicle screws in 1st vertebra) and fixation group (attachment screws in 1st and 3rd vertebra) .The limit loading of antexion and rotation state of USS and the growing rod internal fix-ation system of sliding pedicle screw was tested .All data were analyzed by SPSS 18 .0 software .[Results]At antexion state ,screw loosening occurred in the sliding group at about 400N ,while screw loosening occurred in the fixation group at about 1800N ,and there was significant difference between two groups ( P <0 .05) .At rotation state ,screw loosening occurred in the sliding group at about 5 degrees ,while screw loosening oc-curred in fixation group at about 10 degrees ,and there was significant difference between two groups ( P <0 .05) .[Conclusion] The limit loading of the growing rod internal fixation system of sliding pedicle screw is smaller than that of USS .It indicates that the growing rod internal fixation system of sliding pedicle screw has some deficiencies which need to be further optimized in order to increase the strength of the fixation .