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Evaluation of low level laser therapy, Platelet rich plasma and their combination on the proliferation rate of human periodontal ligament fibroblast: an in vitro study

机译:低水平激光疗法,富血小板血浆及其组合对人牙周膜成纤维细胞增殖速率的评价:体外研究

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The major cellular events in the tissue repair are mitogenesis, migration and metabolism. The proteins responsible forcoordination of these events are called “growth factors”. Activated platelets at the wound margins release several growthfactors, such as PDGF, TFG-β and EGF, etc. The current study was conducted to determine whether there are additionaleffects of PRP combined Laser therapy. In this study PDL cells were obtained during 3rd molar impaction surgery, thesecells were cultured under standard conditions and PDLF were spread on tissue culture plates. Platelet concentrate wasobtained after centrifugation and 15ml of platelet concentrate was added to each well.Subconfluent monolayer’s wereirradiated with an 904nm GaAs laser operated at a power output of 14mv in a continuous wave mode at energy fluencesof 4.02J/cm2, frequency 10,000 Hz. Time of exposure was 300 sec per well and number of irradiation were 3. Afterevery laser treatment, the culture was incubated for 24hrs. The proliferation rate was determined by nonradioactive assaycontaining redox indicator with Alamar Blue Dye after 72 hrs. The numbers of cells were counted under neubar countingchamber after 24, 48 and 72 hrs. The results showed that the treatment of fibroblast with LLLT + PRP revealed aconsiderably higher proliferation activity than control group. The differences were significantly upto 72 hrs (MannWhitney U test,p<0.001) A cellular effect of the laser and platelet concentrate is clearly discernible. It was concludedthat the use of platelet conc.and laser is an effective modality of regeneration.
机译:组织修复中的主要细胞事件是有丝分裂,迁移和新陈代谢。负责蛋白质的蛋白质 这些事件的协调被称为“增长因素”。伤口边缘的活化血小板释放出几种生长 PDGF,TFG-β和EGF等因素。目前的研究是为了确定是否还有其他 PRP联合激光治疗的效果。在这项研究中,PDL细胞是在第三磨牙撞击手术中获得的,这些 将细胞在标准条件下培养,并将PDLF铺在组织培养板上。浓缩血小板原为 离心后获得,并向每个孔中加入15ml血小板浓缩液。 以904nm GaAs激光辐照,能量输出在连续波模式下以14mv的功率输出工作 频率为4.02J / cm2,频率为10,000 Hz。曝光时间为每孔300秒,照射次数为3。 每次激光处理后,将培养物孵育24小时。通过非放射性测定确定增殖率 72小时后,含有带有Alamar蓝染料的氧化还原指示剂。在中性计数下对细胞数进行计数 24小时,48小时和72小时后放置。结果表明,LLLT + PRP处理成纤维细胞显示出 增殖活性明显高于对照组。差异高达72小时(Mann 惠特尼U检验,p <0.001)激光和血小板浓缩液的细胞效应是清晰可辨的。得出结论 血小板浓缩和激光的使用是一种有效的再生方式。

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