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1、Hangman骨折侧方椎弓螺钉固定力学测试72海军总医院2005年6月第18卷第2期E7]phagocyteactivationandinflammatorycytokineproduc—tion[J].Gastroenterology,1996,111(2):419—425.Te~esAM,PajaresJM.Anincreasednumberoffolli—clescontainingactivatedCD69+helperTcellsandpro—liferationCD71+Bcells
2、arefoundinH.pylori-infectedgastricmucosaEJ].AmJGastroenterol,1998,93(4):579—583.[8]LigumskyM,SimonPL,KarmeliF,eta1.Roleofin—terleukin1ininflammatoryboweldisease-enhancedpro—ductionduringactivedisease[J].Gut,1990,31(6):686—689.[93MorrisA,AllMR,Thomsen
3、L,eta1.Tightlyspiralshapedbacteriainthehumanstomach:anothercauseofactivechronicgastritis[J].Gut,1990,31(2):139—143.Hangman骨折侧方椎弓螺钉固定力学测试侯黎升,贾连顺,阮狄克,谭军.,叶晓健,何j.I.,赵广民,张荣峰(1.海军总医院骨科,北京100037;2.上海长征医院骨科,上海200003;3.上海东方医院骨科,上海200120;4.北京军区总医院骨科,北京100700)
4、摘要:目的比较Hangman骨折采用不同方法进行侧方椎弓螺钉固定时椎板的骨折暴力和螺钉的拔出力.方法8例包含枢椎的新鲜颈椎标本利用计算机重建技术模拟寻找出进针点和进针方向后,造成I型Hangman骨折模型,分为单侧单纯侧方椎弓螺钉固定组(A组,2例4侧),双侧单纯侧方椎弓螺钉固定组(B组,4例8侧)和单侧加垫圈侧方椎弓螺钉固定组(C组,2例4侧),钻入3.5mmAO皮质骨螺钉后进行螺钉拔出试验.结果A,B两组在螺钉拔出前均发生钉孑L周围椎板骨质的凹陷或骨折,椎板骨折暴力分别为(11.58士3.1
5、8)kg(8.5～16.0kg)和(25.75士2.4)kg(22.5～28.3kg),螺钉拔出力分别为(29.65士3.89)kg(25.O～33.6kg)和(30.90士3.99)kg(26.8～38.0kg).C组未见钉孑L周围椎板骨折发生,螺钉拔出力为(33.83士4.20)kg(28.O～37.0kg).结论在用侧方椎弓螺钉固定治疗Hangman骨折时,A0皮质骨螺钉钉尾添加垫圈可使钉孑L处椎板抗骨折暴力明显增强,大于螺钉的拔出力.单侧垫圈螺钉固定组的固定效果略优于双侧单纯皮质骨螺钉固
6、定的效果.关键词:Hangman骨折;侧方椎弓;螺钉;垫圈;力学测试中图分类号:R687.3文献标识码:A文章编号:1009—3427(2005)02-0072—05BiomechanicalStudyofScrewFixationofLateralArchintheTreatmentofHangman"FractureHOULi—sheng,JIALiang-shun,RUANDi—ke,etal(DepartmentofOrthopedicSurgery,NavalGeneralHospit
7、al,Beijing100037,China)Abstract:0bjectiveTostudythebreakageforceoflaminaaroundoradjuncttotheheadofscrewandthepull—outstrengthofscrew(A03.5mmcorticalscrew)insertedintouni—orbi—lateralarchofaxistofixHangman'sfracturewithorwithoutabevelwasherbeingusedbe
8、neaththeheadofscrew.MethodsEightfreshcervicalvertebraofhealthcadaverwereclassifiedintothreegroupsrandomlywiththeisthmusofaxisfracturedbyanosteotomtoestablishtypicalHangman'sfracturemodelaftertheentrancepointandtrajectoryorienta—tionoflateralarchscrew
