本文關(guān)鍵詞： 無(wú)定形磷酸鈣 滲透樹(shù)脂 顯微硬度 拋光性能　出處：《口腔醫(yī)學(xué)研究》2017年06期 　論文類型：期刊論文

【摘要】：目的:探討滲透樹(shù)脂中加入納米無(wú)定形磷酸鈣后對(duì)樹(shù)脂顯微硬度及拋光性能的影響。方法:通過(guò)脫礦液建立人工齲模型,分別使用滲透樹(shù)脂及加入納米無(wú)定形磷酸鈣的滲透樹(shù)脂對(duì)齲模型進(jìn)行滲透,使用顯微硬度測(cè)試儀計(jì)算努氏硬度,利用掃描電子顯微鏡觀察釉質(zhì)拋光表面探究無(wú)定形磷酸鈣加入滲透樹(shù)脂后對(duì)樹(shù)脂顯微硬度及拋光性能的影響。結(jié)果:顯微硬度測(cè)試后發(fā)現(xiàn),滲透樹(shù)脂組(C組)與脫礦組(B組)相比,顯微硬度提高(P0.05),但較正常釉質(zhì)組(A組),硬度值存在統(tǒng)計(jì)學(xué)差異(P0.05),納米無(wú)定型磷酸鈣滲透樹(shù)脂組(D組)與正常釉質(zhì)組(A組)相比,無(wú)統(tǒng)計(jì)學(xué)差異。掃描電鏡觀察顯示,滲透樹(shù)脂組(C組)及納米無(wú)定形磷酸鈣滲透樹(shù)脂組(D組)經(jīng)過(guò)相同步驟的拋光后,滲透樹(shù)脂組(C組)表面光滑,孔隙小而少,有少量細(xì)滑痕,納米無(wú)定形磷酸鈣滲透樹(shù)脂組(D組)表面不規(guī)整,孔隙較大,較C組顯粗糙。結(jié)論:滲透樹(shù)脂雖然可以較好恢復(fù)脫礦釉質(zhì)表面的顯微硬度,但與正常釉質(zhì)存在差異,納米無(wú)定形磷酸鈣的加入,可以較好彌補(bǔ)滲透樹(shù)脂這一缺點(diǎn),但是會(huì)影響樹(shù)脂的拋光性能。
[Abstract]:Objective: to study the effect of nano-amorphous calcium phosphate on the microhardness and polishing properties of the resin. Methods: artificial caries model was established by demineralizing solution. The dental caries model was permeated with osmotic resin and osmotic resin with nano-amorphous calcium phosphate, and the Knoop hardness was calculated by microhardness tester. The effects of amorphous calcium phosphate on the microhardness and polishing properties of enamel were investigated by scanning electron microscope. The microhardness of permeable resin group (C) was higher than that of demineralized group (B), but the hardness of group A was significantly higher than that of group A of normal enamel (P 0.05), and the group D of nano-amorphous calcium phosphate osmotic resin (group D) was higher than that of group A of normal enamel (P < 0.05), and that of group A (group D) was higher than that of group A of normal enamel (P < 0.05). There was no statistical difference. SEM observation showed that the surface of permeable resin group (C group) and nano-amorphous calcium phosphate osmotic resin group (group D) were smooth, and the pores were small and little after the same process of polishing. There were a few fine slips, and the surface of group D was irregular and the porosity was larger than that of group C. conclusion: the permeable resin can recover the microhardness of demineralized enamel surface better than that of group C. However, compared with normal enamel, the addition of nano-amorphous calcium phosphate can make up for the shortcoming of permeable resin, but it will affect the polishing performance of resin.
【作者單位】： 南京大學(xué)醫(yī)學(xué)院附屬口腔醫(yī)院南京市口腔醫(yī)院牙體牙髓病科;
【基金】：國(guó)家臨床重點(diǎn)�？平ㄔO(shè)項(xiàng)目經(jīng)費(fèi)資助[衛(wèi)生部衛(wèi)辦醫(yī)政函(2011)873號(hào)] 江蘇省科技發(fā)展計(jì)劃項(xiàng)目(BE2011611)
【分類號(hào)】：R783.1
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本文編號(hào)：1539183