山羊颈椎与人颈椎拉伸性能的对比研究

Comparative study of tensile properties between goat and human cervical spines

目的对比研究山羊颈椎与人颈椎拉伸性能的差异。方法保留肌肉韧带的雄性成年山羊C1-T1节段24具,其中4具剔除肌肉(A组),12具仍保留肌肉韧带(B组),剩余8具标本制作成24个山羊脊柱功能单位,分别在MTS材料机上进行准静态的非破坏性拉伸递进测试,直至标本破坏,分别记录颈椎节段的最大拉伸力、最大位移和刚度等及脊柱功能单位的最大拉伸力,与文献对比其差异有无统计学意义。结果 A组与仅保留韧带的Yoganandan等研究结果相比,平均最大拉伸力、平均最大位移及平均刚度等差异皆无统计学意义(P>0.05)。B组与Yliniemi等研究相比,平均最大位移及平均刚度差异有统计学意义(P<0.05),但平均最大拉伸力差异无统计学意义(P>0.05)。山羊C4-5段脊柱功能单位与Dibb等和Van等研究相比,平均最大拉伸力差异无统计学意义(P>0.05)。结论山羊C1-T1节段和C4-5段脊柱功能单位的最大拉伸力皆与人颈椎相似且山羊拉伸性能个体差异比人小。

Objective To compare the tensile properties difference between goat and human cervical spines. Methods Fourteen muscular and ligamentous C1-T1 segments of adult male goats were obtained,in which 4 specimens were excarnated（Group A）,12 specimens still retained muscu- lar and ligamentous （Group B） and 8 specimens were sectioned into a total of 24 functional spinal unit,then all the segments and units were conducted to a series of non-destructive progressive test- ing followed by tensile distraction teasile forceing to failure using a mini-Bionix MTS machine,and the recorded data of mean of maximum tensile force, maximum displacement and stiffness of cervical segments and maximum tensile force,of units was compared with the human cervical spine from re- ported literature whether the statistical difference were significant. Results Group A which com- pared to the Yoanandan etc＇research that just retained ligament,there was no significant difference （P〉0.05）in the mean of maximum tensile force,maximum displacement and stiffness. Compared to the Yhniemi etc＇research,group B had a significant difference （P〈0.05） with respect to the maxi- mum displacement and stiffness but no significant difference was found in the maximum tensile force （P〉0.05）. Goat FSU C4_5,compared with human research,the maximum tensile force was demonstrated to be no significant difference （P〉0.05）. Conclusion The similarity may existence in the goat C1-T1 segment and FSU C4-5 compared to human cervical spine with respect to the maxi- mum tensile force~