作为空白对照组使用型酶联免疫仪测...
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materials in experimental and control group were tested.111e cell multiplication
was evaluated by MTT after mesenchymal stem ells were cultivated in leaching
Study in vitro
Methods Bilateral femur of six Japanese macro-ears rabbits were made into morselized bone.There were two groups,experimental group and control group.In experimental group,the materials were used as the ratios of morselized bone to
histology inspection were made at different time,and osteogenesis and degradation
of the materials of the two groups were analyzed.
Results Enhancement of osteogenesis was found in the experimental
number control group(P<O.01).It was also obseved by histology that the
of
newly formed bone ofthe experimental group were more than those of the control
CPC with l t0 l,l to 2,l to 3,1 t0 4 and l t0 5;in control group CPC Was used
maximum after it was set.111e
compression strength and setting time of the
mesenchymal stem cells tissue engineering bonedefeet
英文缩略词表
CPC
磷酸钙骨水泥
BMP
骨形态生成蛋白
TGF—B
转移生长因子一B
FGF
成纤维细胞生长因子
TCP
磷酸三钙
Bioceramic
生物陶瓷
HA
羟基磷灰石
BGC
生物活性玻璃陶瓷
HA/TCP
双相钙磷陶瓷
cement With micromorselized bone
calcium Objective To explore the optimum mixing ratio of
phosphate
cement(CPC)谢t11 micromorselized bone for reparing rabbit’S radius defect by the experiment in vitro and vivo.
ADSCs
脂肪间充质干细胞
PDGF
血小板衍生生长因子
VEGF
血管内皮生长因子
L——DMEM
低糖一达尔伯克(氏)改良伊格尔(氏)培养基
MTT
3一(4,5一二甲基噻唑一2)一2,5一二苯基四氮唑溴盐
MSCs
骨髓间充质干细胞
BMD
单位面积的骨矿物盐沉积量
原创性声明
本人郑重声明:本人所呈交的学位论文,是在导师的指导下独 立进行研究所取得的成果。学位论文中凡引用他人已经发表或未发 表的成果、数据、观点等,均已明确注明出处。除文中已经注明引 用的内容外,不包含任何其他人或集体已经发表或撰写过的科研成 果。对本文的研究成果作出重要贡献的个人和集体,均已在文中以 明确方式标明。
保密论文在文献回顾
骨缺损治疗现状
骨缺损、特别是大段骨缺损常因创伤、感染、肿瘤、骨不连多次手术植 骨内固定失败及先天性畸形所致,而且随着现代社会交通工具的普遍使用, 创伤导致的骨缺损发生率越来越高。如何治疗骨缺损的成为世界骨科领域的 难题。传统的方法治疗极为困难,最终很多病例不得不采用截肢术或配戴支 具。现有的治疗有:自体骨移植、异体骨移植、异种骨移植、人工骨和组织 工程技术、基因治疗等,但是都各有利弊,仍没有找到最理想的治疗手段。 骨缺损修复机制及国内外骨缺损治疗方法现状如下所述:
maximum surface of the above two materials.111e
compression strength and
setting time of the material mixed with a ratio of 1 to 3 Was moderate,and there
结论 1:3在可操作性、生物力学、细胞相容性方面是最合适的混合
比例。
体内实验
方法手术造成日本大耳白兔双侧桡骨中段15ram缺损,一侧植入磷酸 钙骨水泥与自体颗粒骨以3:1复合的材料,做为实验组,另一侧植入单纯的
磷酸钙骨水泥,做为对照组。在不同的时间点行X线、骨密度、最大扭矩及 组织学检测,分析实验组及对照组的成骨性能和材料降解程度。
numbers week.The
of bone mineral content in the experimental group were more
than those in the control group(P<0.01).The maximum torsional moment Was
(0.8434-0.016)naN in the experimental group and(0.5404-0.029)mN in the
结论磷酸钙骨水泥与自体颗粒骨以3:1复合后明显促进了缺损修复和
材料降解。 关键词:磷酸钙骨水泥 微小颗粒骨 间充质干细胞组织工程骨缺
损
英文摘要(Abstract)
Experimental study Oil reparing rabbit radius
defect using Compound of calcium phosphate
and l t0 3 was better than those in the materials mixed witlI other ratios by MTT,It
indicated that there Was a significant difference(P<0.05).The cells grew well on
骨缺损修复机制
1.1传导性骨再生
传导性骨再生是指在缺损区填充大小及形状合适的基质材料,做为骨修 复支架。同时也做为生物活性物质和生长因子的载体。对于基质材料有以下 要求:①良好的生物相容性和快速降解能力,对人体无害;②有骨传导性, 利于细胞黏附和增殖;③有~定的强度,能抵抗一定的外力;④可根据需要 塑形成各种形状和大小。
结果MTT检测:比例为l:2和1:3组明显促进骨髓间充质干细胞
的增殖,优于其他组,有统计学意义(P<0.05)。电镜扫描:细胞在l:2、 l:3组材料的表面生长良好,其他组材料表面的细胞量明显少于这两组,与 MTT检测结果相符。l:3组材料的固化时间及最大抗压强度适中,与CPC 组比较,有统计学意义(P<0.05)。
group,and the degradation rate of materials in the experimental group Was faster
than that in the control group at the salTle time.
Conclusion The compound of calcium phosphate cement with
group,and the materials were enclosed significantly by bony callus at the 8th week;
the defects were repaired and the materials were degraded completely at the 1 6th
number liquor of materials.刀}e
and morphous of cells were observed by electron
microscope.
Results The cell multiplication in materials mixed with ratios of l to 2
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日期:趔::』:垒
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morselized bone by a ratio of 3 to 1 significantly improved the defect reparing and
materials degradation
7-
Key words
calcium phosphate cement micromorselized bone
结果X线检查发现:实验组材料明显促进成骨,8周时材料周围有明显 的骨痂,16周时缺损完全修复、材料完全降解,优于对照组; 8周和16周 时,实验组单位面积的骨矿盐含量均高于对照组,统计学检测,P<0.01:16
周时实验组和对照组的最大扭矩分别为:(0.843±O.016)mN、(0.540±0.029) mN,统计学检验P<0.01;组织学检查发现:在同一时间点实验组新生骨量 明显多于对照组,降解速度也比对照组快。
manipuility,biomechanics and cell compatibility.
Study in vivo
Methods The animal models of bilateral radius defect were created by
surgery on Japan white big eat"rabbits.The compound with a ratio of 3 to 1 in a leg
were implanted in experimental group,and calcium phosphate cement were used in the contrasting group.Then X—ray,bone density,maximum torsional moment and
was a significant difference between CPC and material mixed with a ratio of l t0
&
3(P<0.05). Conclusions The ratio of 1 to 3 was thought to be optimum one in
the surface of the materials mixed谢m proportions of l to 2 and 1 to 3,and the
number of eell on the surface of other materials Was smaller than that of eell on the
中文摘要
磷酸钙骨水泥复合自体颗粒骨修复兔桡骨缺损 的实验研究
目的通过体内外实验研究,探讨磷酸钙骨水泥复合自体颗粒骨修复兔 桡骨缺损的最佳比例。
体外试验
方法取6只日本大耳白兔双侧股骨制作颗粒骨,实验组为颗粒骨与
CPC分别以1:l、 l:2、1:3、l:4、l:5混合固化的材料;对照组为 单纯CPC固化的材料。测定对照组和实验组的固化时间及最大抗压强度;骨 髓间充质干细胞培养于材料浸提液中, 3d后MTT检测细胞增殖情况;骨髓 间充质干细胞与各组材料共培养5d,扫描电镜观察材料表面的细胞量及形态。