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1.
人骨髓基质干细胞体外诱导培养的新方法研究   总被引:7,自引:0,他引:7  
目的为骨组织工程的临床应用提供一种新的人骨髓基质干细胞(BMSCs)培养方法,以满足细胞培养过程中对各类细胞因子的需求,同时尽量减少细胞培养过程中动物源性抗原物质的引入。方法采用10%富血小板血浆(PRP)替代动物血清配比高糖DMEM培养基,体外诱导培养(50μg/mL抗坏血酸、10-8mol/L地塞米松、10-3mol/Lβ-甘油磷酸钠)人BMSCs,快速扩增后,倒置相差显微镜、扫描电镜观察各组细胞形态及细胞增殖情况。ALP染色与钙结节染色等方法对细胞进行生物学特性检测。结果人BMSCs24h开始贴壁,7d左右细胞融合。诱导培养后细胞能较快地扩增;ALP染色与钙结节染色结果显示细胞具有良好的成骨细胞生物学特性。结论以自体PRP替代动物血清体外诱导培养人BMSCs是一种良好的培养方法,所培养的细胞数量及其生物学特性能快速达到临床应用的需求。  相似文献
2.
PRP/脱蛋白异种骨修复兔桡骨骨缺损的组织学研究   总被引:3,自引:3,他引:0  
目的探讨富血小板血浆(platelet-rich plasma,PRP)和脱蛋白牛松质骨复合物修复节段性骨缺损的疗效。方法新西兰大白兔28只,切除兔桡骨中下段1 cm的骨质,其中空白组骨缺损区不作处理,试验组骨缺损区植入PRP 脱蛋白牛松质骨,对照组骨缺损区单纯植入脱蛋白牛松质骨。于术后第2、4、8、12周分别处死7只试验动物,结果按Lane骨移植组织学评分标准评分,并进行图像分析,测其新生骨面积。结果术后实验组Lane骨移植组织学评分高于对照组,实验组新生骨面积明显高于对照组。结论复PRP异种脱蛋白骨可用于节段性骨缺损的修复,在骨缺损的修复中具有促进作用成骨方式为骨传导和骨诱导。  相似文献
3.
目的探讨应用富血小板血浆(PRP)对人牙周韧带成纤维细胞(PDLFs)在健康牙和牙周病患牙牙骨质表面附着和增殖情况的影响。方法采用组织块法培养人牙周膜成纤维细胞,取第四代细胞用于实验。分别制备健康牙和牙周病患牙牙骨质块置于96孔板,附着实验在接种细胞后加入含10%PRP和不含PRP的培养液,4小时后MTT法检测附着细胞数量;增殖实验在接种细胞常规培养24小时,而后加入不含血清的培养液培养48小时,更换为含10%PRP和不含PRP的培养液,24小时后MTT法检测细胞数量;并以扫描电镜观察细胞在牙骨质表面的情况。结果附着实验中10%PRP组附着细胞数量较不含PRP组明显增多;增殖实验中10%PRP组和不含PRP组细胞数量无明显差异。结论10%PRP可促进人PDLFs在健康牙和牙周病患牙牙骨质块上的附着,但对细胞在牙骨质块上的增殖无明显影响。  相似文献
4.
目的从放射学方面来评价富血小板血浆重组脱蛋白异种骨修复节段性骨缺损的疗效。方法新西兰大白兔28只,采用二次离心法制成PRP,将PRP与激活剂按5:1比例制成PRP凝胶。在右桡骨中下段造一长1 cm的骨缺损,随机分空白组、实验组、对照组。术后第2、4、8、12周分别对3组家兔行尺桡骨X线检查,根据Lane骨移植X线片评分了解两侧桡骨骨缺损区修复情况。结果术后伤口愈合良好,实验侧Lane骨移植X线片评分明显高于对照侧。结论复PRP异种脱蛋白骨可用于节段性骨缺损的修复,动物卖验证明PRP在骨缺损的修复中具有促进作用。  相似文献
5.
目的 探讨富血小板血浆(platelet rich plasma,PRP)对游离脂肪移植物存活的作用.方法 采用自身配对设计,获取Wistar大鼠脂肪组织和PRP,于24只Wistar大鼠背部分别注射以下3组脂肪移植物:A组为空白对照组;B组为PRP未激活组;C组为PRP激活组.术后1、2、3个月各处死8只大鼠,分别获取3组移植物标本,进行形态学和组织学观察,标本行HE染色,于光镜下观察脂肪组织存活情况,并进行病理学分析.结果 形态学结果显示,术后1个月C组移植物直径明显大于A组(P<0.05),而移植物体积比较,3组间差异均无统计学意义(P>0.05).组织学结果显示,术后1个月,C组小血管密度明显高于A组(P<0.05),术后3个月,C组炎性反应明显轻于A组和B组(P<0.05),而其他病理观察指标:脂肪组织完整性、纤维化程度及囊腔空泡形成,在各时间段3组间差异均无统计学意义(P>0.05).结论 在Wistar大鼠模型上PRP对游离脂肪移植物的存活无明显促进作用.  相似文献
6.
7.
陈震宇  张会增 《中国骨伤》2014,27(3):247-249
目的:观察VSD结合富血小板血浆治疗难愈性创面疗效和特点。方法:2010年4至2012年6月15例难愈性创面患者,男11例,女4例;年龄18~45岁,平均35.2岁。创面形成时间6~24个月,治疗前均经长期换药或多次治疗不愈,应用VSD结合自体富血小板血浆进行治疗,以创面愈合为指标,总结治疗效果和临床特点。结果:15例患者均获随访,时间3~8个月,平均5个月,所有患者创面治愈,无复发。结论:VSD结合富血小板血浆治疗难愈性创面疗效确切,明显缩短了疗程,减少了手术带来的各种创伤,且降低了治疗成本。  相似文献
8.

Background

Thrombocyte concentrate i.e. platelet-rich plasma (PRP) has become a popular adjunct for many surgical procedures. It is believed to improve bone and soft tissue healing. Recently antimicrobial effects of the autologous preparation were reported by several groups. In this study we investigated the antimicrobial effect of PRP against gram-negative microbes which frequently cause severe complications in orthopaedic trauma surgery.

Methods

Platelet-rich plasma was produced from liquid preserved thrombocyte concentrates. ELISA, Western blot and immunohistochemistry were preformed to investigate the release and content of platelet concentrates. A radial diffusion assay was used to detect antimicrobial effects of PRP.

Results

We detected the human beta defensin-3 in bactericidal concentrations in platelet preparations by ELISA, Western blot and immunohistochemistry. In antimicrobial testing we demonstrated effective inhibition of Escherichia coli (ATCC 11303), Bacterium megaterium (ATCC 14581), Klebsiella pneumoniae (ATCC 13883), Enterococcus faecalis (ATCC 29212) and Proteus mirabilis (ATCC21100).

Conclusion

With this study we demonstrate antimicrobial action of a popular adjunct for orthopaedic and trauma surgery against gram-positive and gram-negative bacteria. We have identified a possible mechanism of action via the secretion of HBD-3 as a first line defence in contaminated wounds and in elective application of PRP. This finding supports a broader spectrum of clinical indications for an autologous platelet preparation.  相似文献
9.
Kanthan SR  Kavitha G  Addi S  Choon DS  Kamarul T 《Injury》2011,42(8):782-789

Introduction

The use of bone grafts in treating non- or delayed unions as the result of large bone loss is well established. However, despite good outcomes, the time to achieve complete union is still considerably long. To overcome this problem, the use of platelet-rich plasma (PRP) has been advocated albeit with varying success. To determine the true effectiveness of PRP in treating non-/delayed unions, a study was conducted using (n = 12) rabbit models.

Methods and materials

Critical-sized defects measuring 2 cm created in the midshaft of the right rabbit tibias were stabilised using 2.7-mm small fragment plates. A spacer placed in the defects to create a delay in bone union was replaced at 3 weeks with artificial bone grafts (Coragraft®), with or without PRP. The operated limbs were radiographed following the defect creation and at 3, 7 and 11 weeks (at sacrifice). Bone healing and histological changes were later assessed and scored using the appropriate grading systems. Four groups were compared for quality of healing: (group-A) control group, that is, no PRP or Coragraft; (group-B) PRP; (group-C) Coragraft; and (group-D) PRP and Coragraft.

Results

Group-D demonstrated the best bone healing based on radiological, histological and gross findings (Kruskall-Wallis: p < 0.05). Group-C had significantly higher scores than group-B, whilst group-A had significantly lower scores than all other groups (Mann-Whitney U: p < 0.05).

Conclusion

The use of PRP with bone graft significantly improves the quality of bone healing. However, the use of PRP without bone substitute does not provide adequate repair tissue and, therefore, provides little benefit when used independently.  相似文献
10.
Gradual limb lengthening with external fixators using distraction osteogenesis principles is the gold standard for treatment of limb-length discrepancy. However, long treatment time is a major disadvantage of the current lengthening procedures. Efforts to decrease the treatment include biological and biomechanical factors. Injection of platelet-rich plasma (PRP) is a biological method to enhance bone healing during distraction osteogenesis. We hypothesised that PRP can enhance bone healing during limb lengthening. We report our experience with the use of PRP during distraction osteogenesis. This retrospective study included 19 patients divided into the standard group of 10 patients who did not receive PRP and the PRP group of nine patients who received PRP at the end of the distraction phase. The study variables included external fixator time, external fixation index, and complications during treatment. The PRP group had statistically significantly shorter treatment time (p = 0.0412). Injection of PRP into regenerate bone might be an effective method to shorten treatment time during limb lengthening and lead to better functional outcomes and improved patient satisfaction.Level of evidence: Level IV, therapeutic study.  相似文献
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