超声波对犬牙根管内细菌的影响  

The effects of ultrasonic treatment on bacteria in the root canal

作　　者：符义富[1] 傅尧[1] 游丽萍[1] 王文梅[1] 杨卫东[1] 

机构地区：[1]南京大学医学院附属口腔医院,210008

出　　处：《实用医学杂志》2009年第5期697-699,共3页The Journal of Practical Medicine

基　　金：南京市医学科技发展指导项目(编号:0585)

摘　　要：目的:探讨超声波冲洗对牙根尖周炎根管内细胞的影响。方法:采用开髓法使Beagle犬上、下前牙自然暴露,制备牙根尖周炎模型;在超声波冲洗和K锉预备对模型Beagle犬前牙根管处理前后分别采集标本进行细菌检测,分析细菌检出量、检出率和构成比的变化。结果:超声波根管冲洗后需氧菌落数和厌氧菌落数明显减少,与K锉预备相比差异有显著性(P<0.05)。两组细菌鉴定的检出百分率分别为葡萄球菌属27.77%、61.11%,链球菌属24.07%、49.99%,放线菌属18.52%、44.44%,普雷沃菌属22.22%、44.44%,紫单胞菌属20.37%、38.89%,梭杆菌属14.81%、27.78%,消化链球菌属12.96%、22.22%,差异有统计学意义,其他细菌的检出率、量虽有减少,但差异无统计学意义。结论:无论是厌氧菌还是需氧菌,超声波都能有效地减少其在根管内数量,与K锉预备相比其效果显著。Objective To investigate the effects of ultrasonic irrigation on bacteria in the root canal.Methods A canine model of chronic apical periodontitis was established by exposure of the upper and lower front teeth of Beagle dogs.Samples were collected before and after either ultrasonic irrigation for the root canal of the front teeth or root-canal preparation with K-file.Results The number of colonies of aerobic and anaerobic bacteria in the root canal was significantly reduced in ultrasonic irrigation, as comp...

关 键 词：细菌 根管预备 超声波 比格犬 

分 类 号：R781[医药卫生—口腔医学]