中华创伤杂志
中華創傷雜誌
중화창상잡지
Chinese Journal of Traumatology
2013年
6期
556-560
,共5页
翁益民%水小龙%孔建中%潘骏%洪建军%陈华%郭晓山
翁益民%水小龍%孔建中%潘駿%洪建軍%陳華%郭曉山
옹익민%수소룡%공건중%반준%홍건군%진화%곽효산
股骨骨折%内固定器%生物力学
股骨骨摺%內固定器%生物力學
고골골절%내고정기%생물역학
Femoral fractures%Internal fixators%Biomechanics
目的 通过对新鲜尸体标本的力学研究,比较新型微创动力髋钢板(minimal invasion dynamic hip plate,MIDHP)和动力髁螺钉(dynamic condylar screw,DCS)固定股骨转子下骨折的生物力学性能. 方法 全部标本先制作Seinsheimer分型ⅡA型股骨转子下骨折模型,按随机排列表法分组进行DCS和MIDHP内固定.根据实验要求以自凝型牙托粉包埋股骨头及股骨远端.先行扭转强度试验,再行压缩强度试验,然后进行破坏试验,记录极限载荷.对所得数据进行统计学处理. 结果 标本扭转强度测试表明,在扭转至3°内两组标本均基本稳定.扭转1.5°时DCS组扭矩为(3.16 ±0.13)N·m,MIDHP组为(3.31 ±0.27)N·m,两组扭矩及扭转刚度比较差异无统计学意义,两种内固定器抗旋转性能相近.标本压缩强度测试表明,800 N载荷时DCS组压缩刚度为(532.27±61.02) N/mm,MIDHP组为(581.98±77.56) N/mm,压缩位移及刚度MIDHP组明显高于DCS组(P＜0.05).破坏试验表明,DCS组极限载荷为(2 994.38 ±244.81)N,MIDHP组为(3 322.13±141.21)N,MIDHP组明显大于DCS组(P＜0.01). 结论 MIDHP设计合理,抗旋转能力强,抗压缩能力强于DCS,治疗股骨转子下骨折时比DCS更具生物力学优势,可以微创操作,值得推广.
目的 通過對新鮮尸體標本的力學研究,比較新型微創動力髖鋼闆(minimal invasion dynamic hip plate,MIDHP)和動力髁螺釘(dynamic condylar screw,DCS)固定股骨轉子下骨摺的生物力學性能. 方法 全部標本先製作Seinsheimer分型ⅡA型股骨轉子下骨摺模型,按隨機排列錶法分組進行DCS和MIDHP內固定.根據實驗要求以自凝型牙託粉包埋股骨頭及股骨遠耑.先行扭轉彊度試驗,再行壓縮彊度試驗,然後進行破壞試驗,記錄極限載荷.對所得數據進行統計學處理. 結果 標本扭轉彊度測試錶明,在扭轉至3°內兩組標本均基本穩定.扭轉1.5°時DCS組扭矩為(3.16 ±0.13)N·m,MIDHP組為(3.31 ±0.27)N·m,兩組扭矩及扭轉剛度比較差異無統計學意義,兩種內固定器抗鏇轉性能相近.標本壓縮彊度測試錶明,800 N載荷時DCS組壓縮剛度為(532.27±61.02) N/mm,MIDHP組為(581.98±77.56) N/mm,壓縮位移及剛度MIDHP組明顯高于DCS組(P＜0.05).破壞試驗錶明,DCS組極限載荷為(2 994.38 ±244.81)N,MIDHP組為(3 322.13±141.21)N,MIDHP組明顯大于DCS組(P＜0.01). 結論 MIDHP設計閤理,抗鏇轉能力彊,抗壓縮能力彊于DCS,治療股骨轉子下骨摺時比DCS更具生物力學優勢,可以微創操作,值得推廣.
목적 통과대신선시체표본적역학연구,비교신형미창동력관강판(minimal invasion dynamic hip plate,MIDHP)화동력과라정(dynamic condylar screw,DCS)고정고골전자하골절적생물역학성능. 방법 전부표본선제작Seinsheimer분형ⅡA형고골전자하골절모형,안수궤배렬표법분조진행DCS화MIDHP내고정.근거실험요구이자응형아탁분포매고골두급고골원단.선행뉴전강도시험,재행압축강도시험,연후진행파배시험,기록겁한재하.대소득수거진행통계학처리. 결과 표본뉴전강도측시표명,재뉴전지3°내량조표본균기본은정.뉴전1.5°시DCS조뉴구위(3.16 ±0.13)N·m,MIDHP조위(3.31 ±0.27)N·m,량조뉴구급뉴전강도비교차이무통계학의의,량충내고정기항선전성능상근.표본압축강도측시표명,800 N재하시DCS조압축강도위(532.27±61.02) N/mm,MIDHP조위(581.98±77.56) N/mm,압축위이급강도MIDHP조명현고우DCS조(P＜0.05).파배시험표명,DCS조겁한재하위(2 994.38 ±244.81)N,MIDHP조위(3 322.13±141.21)N,MIDHP조명현대우DCS조(P＜0.01). 결론 MIDHP설계합리,항선전능력강,항압축능력강우DCS,치료고골전자하골절시비DCS경구생물역학우세,가이미창조작,치득추엄.
Objective To perform a mechanical test of fresh cadaver specimens and compare the biomechanical properties of the novel minimal invasion dynamic hip plate (MIDHP) and the dynamic condylar screw (DCS) in treatment of subtrochanteric fractures of the femur.Methods All specimens were firstly used to simulate models of Seinsheimer type ⅡA subtrochanteric fractures of the femur,which were later divided into DCS group and MIDHP group.Based on experimental requirements,the femoral head and distal femur were embedded using seff-freezing type dental base acrylic resin powder.Torsion strength test was given in the first place,succeeded by compression strength test.Finally,destructive test was made to record the limit load.All experimental data were analyzed statistically.Results Torsion strength test showed that specimens of both groups were basically stable as the reverse was within 3°.Torque for specimens in DCS and MIDHP groups was (3.16 ± 0.13) N · m and (3.31 ± 0.27) N · m respectively as the reverse was 1.5°.Both torque and torsion stiffness had no statistical significance between the two groups,and the anti-rotation features of the two internal fixations were similar.Compression strength test showed that compression stiffness of specimens in DCS group was (532.27 ±61.02) N/mm and (581.98 ±77.56) N/mm in MIDHP group at a load of 800 N,with evidently higher compression displacement and stiffness in MIDHP group (P ＜ 0.05).Destructive test showed the maximum load of specimens in DCS and MIDHP groups was (2 994.38 ±244.81) N and (3 322.13 ± 141.21) N respectively,far higher in MIDHP group (P ＜ 0.01).Conclusions MIDHP is characterized by reasonable design,strong anti-rotation property and anti-compression property over DCS.In comparison with DCS,MIDHP has biomechanical advantage in treatment of femoral subtrochanteric fractures,for it can be performed minimally invasive and is worthy of further application.
