本文關(guān)鍵詞： iRoot BP Plus MTA 邊緣密合性 微滲漏　出處：《昆明醫(yī)科大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：[目的]比較使用新型生物陶瓷材料iRoot BP Plus和MTA實(shí)施根尖倒充填術(shù)后,根尖微滲漏情況及材料與牙體組織之間的邊緣密合性,為臨床治療提供理論依據(jù)。[方法]收集新鮮拔除的單根牙45顆,沿釉牙骨質(zhì)界截冠,ProTaper機(jī)用鎳鈦器械以冠向下技術(shù)根管預(yù)備至F2,根尖切除3mm,超聲倒預(yù)備3mm,將樣本隨機(jī)分為3組,A、B組每組20顆,分別用MTA和iRoot BP Plus倒充填,C組5顆牙為陰性對(duì)照組,不進(jìn)行倒充填。從A、B組中各隨機(jī)選擇3個(gè)樣本用掃描電子顯微鏡觀察倒充填材料與牙本質(zhì)的邊緣密合情況；其余17個(gè)樣本用0.2%羅丹明B溶液染色48h,再將牙體沿牙長(zhǎng)軸縱向剖開(kāi),置于體式顯微鏡下觀察染料滲透長(zhǎng)度。數(shù)據(jù)采用獨(dú)立樣本t檢驗(yàn)進(jìn)行分析,檢驗(yàn)水準(zhǔn)α=0.05。[結(jié)果]1.染料滲透實(shí)驗(yàn)：陰性對(duì)照組樣本均未觀察到染料滲透,MTA組染料滲透平均長(zhǎng)度為0.90±0.84mm, iRoot BP Plus組為1.06±0.88mm,兩組的染料滲透長(zhǎng)度無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)。2.掃描電子顯微鏡：MTA與牙本質(zhì)間微縫隙平均值為2.836±1.726μm, iRoot BP Plus與牙本質(zhì)間微縫隙平均值為2.922±1.7241μm,兩種材料與牙本質(zhì)間微縫隙的平均值無(wú)統(tǒng)計(jì)學(xué)差異(P0.05)。[結(jié)論]iRoot BP Plus的根尖封閉性與MTA相似,而iRoot BP Plus為預(yù)混合材料,操作方便,可操作時(shí)間較長(zhǎng),目前價(jià)格低于MTA, iRoot BP Plus可作為牙髓治療材料在口腔臨床應(yīng)用,但其臨床療效還需更進(jìn)一步研究。
[Abstract]:[objective] to compare the apical microleakage and marginal tightness between the new bioceramic materials (iRoot BP Plus and MTA) after apical filling. [methods] 45 fresh extracted single teeth were collected. ProTaper machine was used to prepare the root canal to F2 with the technique of coronal downward technique along the enamel bone boundary. The samples were divided into 3 groups randomly: group A (n = 20), group A (n = 20), group C (n = 5), group C (n = 5), group C (n = 5), group C (n = 5), group A (n = 5) were treated with MTA and iRoot BP Plus (n = 5). Three samples were randomly selected from each group to observe the tightness between the filling material and the dentin by scanning electron microscope, the other 17 samples were stained with 0.2% rhodamine B solution for 48 hours, and then the teeth were dissected longitudinally along the long axis of tooth, the other 17 samples were stained with 0.2% rhodamine B solution for 48 hours. The dye permeation length was observed under a pose microscope. The data were analyzed by independent sample t-test. Dye permeation test: the average length of dye permeation was 0.90 鹵0.84mm in the negative control group and 1.06 鹵0.88mm in the iRoot BP Plus group. There was no significant difference in the dye permeation length between the two groups. The mean value of microgap between iRoot BP Plus and dentin was 2.836 鹵1.726 渭 m, and that between iRoot BP Plus and dentin was 2.922 鹵1.7241 渭 m. There was no significant difference between the two materials and dentin. [conclusion] the apical closure of iRoot BP Plus is similar to that of MTA. However, iRoot BP Plus is a premixed material, which is easy to operate and can be operated for a long time. At present, the price of iRoot BP Plus is lower than that of MTA. IRoot BP Plus can be used as dental pulp treatment material, but its clinical effect needs further study.
【學(xué)位授予單位】：昆明醫(yī)科大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：R781.05

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