本文選題：導(dǎo)光性能 + 光固化��； 參考：《實用口腔醫(yī)學(xué)雜志》2017年04期

【摘要】：目的:評價2種不同導(dǎo)光性能的纖維樁對根管深部樹脂水門汀聚合程度的影響。方法:16顆單根人前磨牙去冠后根管預(yù)備,隨機(jī)分為導(dǎo)光組和非導(dǎo)光組(n=8)。分別以i-TFC導(dǎo)光纖維樁和非導(dǎo)光性Pananiva纖維樁聯(lián)合光固化樹脂水門汀行樁核修復(fù)。每個修復(fù)后的牙根制備3枚牙本質(zhì)片,依照其位置分為根頸段、根中段、根尖段。測試2組樹脂水門汀在根管不同深度的努氏(Knoop)顯微硬度值(HK)并計算其相對聚合度,進(jìn)行雙因素方差分析。結(jié)果:隨根管深度的增加,2組樹脂水門汀的顯微硬度和相對固化率均呈下降趨勢,根頸段和中段2項指標(biāo)組間差異無統(tǒng)計學(xué)意義(P0.05)。導(dǎo)光組和非導(dǎo)光組樹脂水門汀在根尖段的HK值分別為33.25±3.04和23.80±5.93(P0.05)。在根尖段的相對聚合度分別為69.89%與50.05%(P0.05)。結(jié)論:導(dǎo)光纖維樁有助于提高樹脂水門汀在根尖區(qū)域的聚合程度。
[Abstract]:Aim: to evaluate the effect of two kinds of fiber piles with different light conductivity on the polymerization degree of deep root canal resin cement.Methods Sixteen single human premolars were randomly divided into two groups: light guided group and non-guided group.I-TFC light-guided fiber pile and non-photoconductive Pananiva fiber pile combined with light-cured resin cement were used to repair the post and core.Three dentin slices were prepared from each repaired root, and were divided into three segments according to their position: the cervical segment, the middle segment and the apical segment.The microhardness of two groups of resin cement (Knoop) at different depths of root canal was tested and the relative degree of polymerization was calculated.Results: with the increase of root canal depth, the microhardness and relative curing rate of the two groups showed a downward trend, and there was no significant difference between the two groups.The HK values of resin cement in the apical segment of light guide group and non light guide group were 33.25 鹵3.04 and 23.80 鹵5.93 (P 0.05), respectively.The relative degree of polymerization in the apical segment was 69.89% and 50.05%, respectively.Conclusion: the light-guided fiber pile is helpful to improve the degree of polymerization of resin cement in the apical region.
【作者單位】： 第三軍醫(yī)大學(xué)西南醫(yī)院口腔科;軍事口腔醫(yī)學(xué)國家重點實驗室口腔疾病國家臨床醫(yī)學(xué)研究中心陜西省口腔醫(yī)學(xué)重點實驗室第四軍醫(yī)大學(xué)口腔醫(yī)院修復(fù)科;
【基金】：教育部留學(xué)回國人員科研啟動基金資助項目(編號:HG2015-002) 軍事口腔醫(yī)學(xué)國家重點實驗室開放課題資助項目(編號:2014KB09) 重慶市基礎(chǔ)與前沿研究計劃項目(編號:cstc2013jcyj A10112)
【分類號】：R783.1

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