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醫(yī)學論文范文:超聲蕩洗對根管清潔效果的掃描電鏡觀察
【摘要】 目的：用掃描電鏡的方法評價根管超聲蕩洗的清潔效果。方法：選擇單根管前磨牙20顆，隨機分為注射器沖洗組和超聲蕩洗組。機用鎳鈦器械預備根管后，兩組最后選用不同方法沖洗根管。在根管的3個不同部位采用掃描電鏡記錄牙本質(zhì)小管開口與玷污層情況。結(jié)果：A組牙本質(zhì)小管開口數(shù)多于B組(P<0.05);兩組相應部位比較，冠1/3處牙本質(zhì)小管開口數(shù)之間的差異無統(tǒng)計學意義(P>0.05)，A組在根中1/3和根尖1/3的牙本質(zhì)小管開口數(shù)明顯多于B組(P<0.05)。結(jié)論：用17%EDTA超聲根管沖洗效果優(yōu)于注射器沖洗。
【關(guān)鍵詞】 牙本質(zhì)小管 超聲蕩洗 掃描電鏡 玷污層
A scanning electron microscopic (SEM) evaluation of efficacy of ultrasonic irragation for root canal
GUO Jinjie, WU Peiling, XIE Fenglian
(Department of Stomatology， Second Affiliated Hospital，Xinjinag Medical University，Urumqi 830028， China)
Abstract: Objective: Using scanning electron microscope(SEM) to investigate efficacy of ultrasonic irrigation. Methods: Twenty single extracted teeth were randomly divided into two groups with ten teeth in each group (ultrasonic irrigation group and syringe irrigation group). The final irrigation choose diffirent way, the scanning electron microscope was used to evaluate for the number of visible open dentinal tubules and smear layers. Result: The number of visible open dentinal tubules in group A are significantly greater than that in group B, In the respective third, cleaning of group A and B in the coronal third is not different. But cleaning of group A is better than group B in middle third and apical third parts. Conclusion: Ultrasonic irrigation is better than syringe irrigation in root canal therapy.
Key words: dentinal tubules; ultrasonic irrigation; the sanning electron microscope (SEM); the smear layer
根管治療術(shù)是牙髓病和根尖周病最有效的治療手段[1]，而根管沖洗對根管系統(tǒng)的清理和消毒起著重要作用，是根管預備過程中不可缺少的步驟[2]。在臨床上根管沖洗通常采用人工注射器沖洗的方法，這種傳統(tǒng)的沖洗方法使沖洗劑的滲透及去除碎屑的作用均得不到充分發(fā)揮[3]。國內(nèi)外的研究表明，根管超聲沖洗是提高根管清理效果的較好手段，但仍存在不同的觀點。本實驗的目的是用掃描電鏡的方法評價根管超聲沖洗的效果，以期為根管超聲沖洗技術(shù)的推廣應用及提高根管充填的質(zhì)量提供依據(jù)醫(yī)學 全在.線提供m.52667788.cn。
1材料與方法
1.1樣本的收集和分組收集2007年12月～2008年8月我院及第一附屬醫(yī)院口腔科因牙周病及正畸拔除的單根管前磨牙20顆，存儲于0.9%氯化鈉溶液中備用。20顆牙隨機分為兩組，A組超聲蕩洗組，B組普通注射器組。
