【摘要】：目的:比較3種往復(fù)旋轉(zhuǎn)單支鎳鈦器械預(yù)備模擬彎曲根管的切割能力和成形能力,為其臨床應(yīng)用提供參考。方法:選取30個(gè)單彎樹脂模擬根管,隨機(jī)分成三組:Reciproc組,One file組,Wave One組。按廠家提供的說明預(yù)備模擬根管,記錄預(yù)備時(shí)間、預(yù)備前后每個(gè)模塊質(zhì)量的差值;獲得模塊預(yù)備前后的根管圖像并利用Photoshop和Image Pro Plus測(cè)量其彎曲角度的變化;以及測(cè)量從距離根尖孔1mm處開始到距離根尖孔10mm處,每增加1mm其根管內(nèi)外壁樹脂去除量的差值,從而得出鎳鈦器械的中心定位能力。最終數(shù)據(jù)將使用單因素方差分析進(jìn)行統(tǒng)計(jì)學(xué)分析。結(jié)果:1)Wave One組的預(yù)備時(shí)間較其他2組長(zhǎng)(P0.05);2)3組鎳鈦器械預(yù)備前后模擬根管的質(zhì)量差比較差異,無統(tǒng)計(jì)學(xué)意義(P0.05);3)3組鎳鈦器械預(yù)備前后對(duì)于模擬根管的彎曲角度改變比較差異,無明顯統(tǒng)計(jì)學(xué)意義(P0.05);4)距離根尖孔5mm處,Reciproc組和One file組的中心定位能力優(yōu)于Wave One組(P0.05),在距離根尖孔6、7mm處,One file組的中心定位能力優(yōu)于其他2組(P0.05)。結(jié)論:三種往復(fù)旋轉(zhuǎn)鎳鈦器械均有較好的切削能力,其中Reciproc和One file預(yù)備根管的效率高于Wave One;三種器械均可較好的保持模擬根管的原始形態(tài),其中One file在根管中段的中心定位能力優(yōu)于其他2組。
[Abstract]:Objective: To compare the cutting ability and forming ability of 3 kinds of rotary single branch nickel titanium instruments to simulate the cutting of curved root canal, and to provide reference for its clinical application. Method: select 30 single curved resin simulated root canals and randomly divide into three groups: Reciproc group, One file group and Wave One group. The difference in the mass of each module before and after, obtained the root canal image before and after the module preparation, and measured the change of the bending angle by Photoshop and Image Pro Plus; and measured the difference between the internal and external wall resin removal of the root canal from 1mm from the distance root tip to the 10mm of the root apex hole, thus obtaining the central determination of the nickel titanium instrument. The final data will be analyzed statistically with single factor analysis of variance. Results: 1) the preparation time of Wave One group is longer than that of the other 2 groups (P0.05); 2) the difference in the quality of the simulated root canal before and after the preparation of the 3 sets of nickel titanium instruments is not significant (P0.05); 3) the ratio of the bending angle of the simulated root canal before and after the 3 sets of nickel titanium instruments is changed. There was no significant statistical significance (P0.05) (P0.05); 4) the central positioning ability of group Reciproc and One file was better than that of Wave One group (P0.05) from the root apex hole 5mm. The central positioning ability of the One file group was better than the other 2 groups (P0.05) at the distance from the root tip hole. Conclusion: the three kinds of reciprocating rotary nickel titanium instruments have better cutting ability. The efficiency of the root canal preparation and One file was higher than that of Wave One; the three instruments could better maintain the original morphology of the simulated root canal, and the central positioning ability of One file in the middle part of the root canal was better than that of the other 2 groups.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：R781.05

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