CAJ | 학술논문

目的对一种新型无需传统锁钉的两端膨胀自锁髓内钉进行生物力学性能测试和评价. 方法将6对新鲜人股骨尸体标本分为两组,均制备股骨中段横行骨折模型,分别用两端膨胀自锁髓内钉和国产传统交锁髓内钉内固定,并使断端间保留1.5 cm的裂隙.分别对其进行轴向压缩载荷、水平扭转及三点弯曲等生物力学测试,并对相关实验数据进行统计学分析. 结果两端膨胀自锁髓内钉的抗短缩刚度、抗旋转刚度及抗弯曲刚度均略小于传统交锁髓内钉,差异无统计学意义(P>0.05). 结论两端膨胀自锁髓内钉与交锁髓内钉固定效果相当,具有较强抗压、抗弯、抗旋性能,符合生物学固定的要求,有较好的临床推广应用前景.
목적 대일충신형무수전통쇄정적량단팽창자쇄수내정진행생물역학성능측시화평개. 방법장6대신선인고골시체표본분위량조,균제비고골중단횡행골절모형,분별용량단팽창자쇄수내정화국산전통교쇄수내정내고정,병사단단간보류1.5 cm적렬극.분별대기진행축향압축재하、수평뉴전급삼점만곡등생물역학측시,병대상관실험수거진행통계학분석. 결과량단팽창자쇄수내정적항단축강도、항선전강도급항만곡강도균략소우전통교쇄수내정,차이무통계학의의(P>0.05). 결론량단팽창자쇄수내정여교쇄수내정고정효과상당,구유교강항압、항만、항선성능,부합생물학고정적요구,유교호적림상추엄응용전경.
Objective To evaluate the biomechanical properties of a new device of internal fixation for femoral fractures, intrameduUary expanded self-locking nail (IESN). Methods Six pairs of cadaveric specimens of fresh adult femur were used to create transverse fracture models of middle femoral shaft. The specimens were randomized into 2 equal groups. Group 1 was fixated with IESN and Group 2 with conventional interlocking nails. A 1.5 cm bone gap was remained between fracture ends. All specimens were subjected to biomechanical tests for axial compression load, horizontal torsion and three-peint bending. The data were analyzed with statistic software SPSS13.0. Results The rigidities of Group 1 resisting rotation, axial displacement and bending were a little lower than those of Group 2, but there were no statistically significant differences between the two groups. Conclusion In treatment of femoral fractures, IESN is nearly as good as conventional interlocking nails but its application is simpler and free of conventional locking.