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ID:15206851
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时间:2018-08-02
《可降解复合人工骨修复骨缺损的实验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、可降解复合人工骨修复骨缺损的实验研究作者:陈建民,刘方刚,金大地【摘要】[目的]探讨硫酸钙(CS)/骨基质明胶(BMG)复合人工骨修复节段性骨缺损的能力。[方法]分别制备CS、BMG,按一定比例复合,植入兔尺骨15mm骨缺损,并随机分为3组,CS/BMG组植入复合人工骨、CS组单纯植入硫酸钙、空白对照组缺损区旷置。标本于术后4、8、12周分批取材,经大体观察、影像学、组织学及四环素荧光示踪检测,观察修复骨缺损的效果。[结果]术后切口均一期愈合,植入区周围未见炎性细胞浸润。CS/BMG组植入4周,缺损区两端及中央均可见岛状新骨生长,8周时材料已完全降解,新骨生长
2、活跃,并逐渐由编织骨重塑为板层骨,12周缺损区被新生骨替代,骨结构逐渐成熟,与宿主骨间形成骨性桥接,髓腔再通,完成骨性修复。CS组4周两端也见新骨生长,但较CS/BMG组成骨量少,中央部位新骨出现时间晚。8周时材料完全降解吸收,植入区可见大量骨痂生长,两端出现板层样新骨,12周缺损区得到基本修复,但骨髓腔轮廓不清。空白组术后形成骨不连。[结论]。CS/BMG复合人工骨具有良好的生物相容性和可降解性,能有效地修复兔尺骨骨缺损,是一种较为理想的骨移植替代材料。【关键词】硫酸钙;骨基质明胶;人工骨;骨缺损;骨移植14Abstract:[Objective]Toinv
3、estigatetheosteogeneticeffectofcalciumsulfate(CS)combinedwithbonematrixgelatin(CS)asbonesubstitutematerialinarabbitulnardefectmodel.[Method]TwentyoneadultNewZealandWhiterabbitswereused.Thesegmentalulnardefectsof15mmwerecreatedb/laterallyandweredividedintotbreegroups:Group1,defectswe
4、refilledwithCS/BMG;Group2,defectswerefilledwithCS;Group3,untreatedcontroldefects.Thesampleswereharvestedat4,8,12weeksandwereexaminedbyradiographic,histomorphologicalandtetracyclinetracinganalysis.[Result]Noinflammatoryorforeignbodyreactionwasobservedaroundallthedefects.BothCS/BMGand
5、CSwerealmostcompletelyresorbed8weekspostoperation.Atthegroup1,nembonewasfoundthrongboutthedefectsafter4weeks.Alldefectswererepairedwithawellorganizedtraheeularpatternandathinneocortexafter12weeks.Atthegroup2,massofnewbonetissueformedattheperipheryofthedefect4weekspostoperatlon,butt
6、hedevelopmentofnewboneatthecentralofthedefectwaslatterthanthatatthegroup1.At12weeks,alldefectswerebridgedbynewbonetissuewithlittleadjacentmedullarybone.Atthegroup3,slightnewbonewasobservedat14theperipheryofthedefectregion,andthedefectswerefilledwithfibroustissue.[Conclusion]Calciums
7、ulfatecontainingbonematrixgelatinistotallybioresorbableandbiocompatible.Thecompoundmaterialcanenhancetherepairbonedefectseffectivelyasabonegraftsubstitute.Keywords:calciumsulfate;bonematrixgelation;artificialbone;bonedefect;bonetransplantation骨缺损的修复重建是矫形外科领域的重点课题之一。自体骨被公认为骨移植的“金标准”,
8、但其来源有限,且取骨处存在较高并发症,
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