中国组织工程研究
中國組織工程研究
중국조직공정연구
Journal of Clinical Rehabilitative Tissue Engineering Research
2014年
40期
6524-6530
,共7页
王国栋%姜海波%张元民%赵晓伟%潘滔
王國棟%薑海波%張元民%趙曉偉%潘滔
왕국동%강해파%장원민%조효위%반도
植入物%数字化骨科%髓内钉%股骨骨折%骨折固定%生物力学%有限元分析%应力分布%山东省自然科学基金
植入物%數字化骨科%髓內釘%股骨骨摺%骨摺固定%生物力學%有限元分析%應力分佈%山東省自然科學基金
식입물%수자화골과%수내정%고골골절%골절고정%생물역학%유한원분석%응력분포%산동성자연과학기금
femoral fractures%fractures,stress%bone nails%finite element analysis
背景:交锁髓内钉并发症诸如锁钉弯曲或断裂、退出,钉尾或锁钉孔处再骨折仍然存在,基于此,作者所在课题组设计了一种新型的髓内持骨动力性髓内钉。<br> 目的:检验髓内持骨动力性髓内钉设计和强度的合理性与安全性,并就其临床应用和改进提出合理建议。<br> 方法:分别建立全股骨及髓内持骨动力性髓内钉固定股骨干横形骨折三维有限元模型。对全股骨模型和骨折模型进行垂直加载及步态分析,了解各模型的应力分布和动力加压特点。<br> 结果与结论:在承重载荷下,全股骨模型的股骨颈部及股骨干内外侧缘存在较明显应力集中,骨折模型的应力集中部位位于髓内钉顶端及锁钉周围;步态中,全股骨模型的股骨远端1/2前内侧及股骨颈部存在应力集中,骨折模型的应力集中部位位于髓内钉顶端及锁钉周围;髓内持骨动力性髓内钉有断端动力性加压功能。说明这种髓内持骨动力性髓内钉结构合理,具有良好的生物力学性能。
揹景:交鎖髓內釘併髮癥諸如鎖釘彎麯或斷裂、退齣,釘尾或鎖釘孔處再骨摺仍然存在,基于此,作者所在課題組設計瞭一種新型的髓內持骨動力性髓內釘。<br> 目的:檢驗髓內持骨動力性髓內釘設計和彊度的閤理性與安全性,併就其臨床應用和改進提齣閤理建議。<br> 方法:分彆建立全股骨及髓內持骨動力性髓內釘固定股骨榦橫形骨摺三維有限元模型。對全股骨模型和骨摺模型進行垂直加載及步態分析,瞭解各模型的應力分佈和動力加壓特點。<br> 結果與結論:在承重載荷下,全股骨模型的股骨頸部及股骨榦內外側緣存在較明顯應力集中,骨摺模型的應力集中部位位于髓內釘頂耑及鎖釘週圍;步態中,全股骨模型的股骨遠耑1/2前內側及股骨頸部存在應力集中,骨摺模型的應力集中部位位于髓內釘頂耑及鎖釘週圍;髓內持骨動力性髓內釘有斷耑動力性加壓功能。說明這種髓內持骨動力性髓內釘結構閤理,具有良好的生物力學性能。
배경:교쇄수내정병발증제여쇄정만곡혹단렬、퇴출,정미혹쇄정공처재골절잉연존재,기우차,작자소재과제조설계료일충신형적수내지골동력성수내정。<br> 목적:검험수내지골동력성수내정설계화강도적합이성여안전성,병취기림상응용화개진제출합리건의。<br> 방법:분별건립전고골급수내지골동력성수내정고정고골간횡형골절삼유유한원모형。대전고골모형화골절모형진행수직가재급보태분석,료해각모형적응력분포화동력가압특점。<br> 결과여결론:재승중재하하,전고골모형적고골경부급고골간내외측연존재교명현응력집중,골절모형적응력집중부위위우수내정정단급쇄정주위;보태중,전고골모형적고골원단1/2전내측급고골경부존재응력집중,골절모형적응력집중부위위우수내정정단급쇄정주위;수내지골동력성수내정유단단동력성가압공능。설명저충수내지골동력성수내정결구합리,구유량호적생물역학성능。
BACKGROUND:Interlocking intramedul ary nail complications contain nail bent or broken, exit, re-fracture at spiketail or nail hole. Thus, our team designs a novel intramedul ary control ed dynamic nail. <br> OBJECTIVE:To evaluate the rationality and safety of intramedul ary control ed dynamic nail design and strength, and to give rational proposal for its clinical application. <br> METHODThe three-dimensional finite element models of composite femur, transverse fractures of the femoral shaft were constructed with intramedul ary control ed dynamic nailing. The stress and strain were detected under vertical loads and gait cycle. <br> RESULTS AND CONCLUSION:The maximum stress of the intact femur under the compression load was at femoral neck and the medial and lateral aspects of the femoral shaft;while the stresses of fractured femur were at the interface between screw and screw hole. In gait cycle, in case of intact bone, large stresses were found in the distal 1/2 of anteriomedialis of femoral shaft;while the stress distribution in fractured femur was similar with the <br> former. Intramedul ary control ed dynamic nailing has the ability of generating compression between fragments. These suggest that intramedul ary control ed dynamic nailing is rational and good at design and biomechanical properties.