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首页> 外文期刊>Journal of dentistry >The measurement of degradation and wear of three glass ionomers following peroxide bleaching.
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The measurement of degradation and wear of three glass ionomers following peroxide bleaching.

机译：过氧化物漂白后三种玻璃离聚物的降解和磨损的测量。

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OBJECTIVES: To investigate, for three glass ionomer dental materials, the effects of a hydrogen peroxide solution on the elution of key elements, and the effects of a novel 6% hydrogen peroxide tooth whitening gel on subsequent wear rates with a toothpaste slurry. METHODS: Discs specimens of three glass ionomers (ChemFlex, Fuji II and Ketac-Fil) were prepared. One set of discs was exposed to either 6% hydrogen peroxide in phosphate buffer, phosphate buffer, water, a carbonated beverage or 38% orthophosphoric acid for 60 min. The ions eluted from the discs were determined by inductively coupled plasma-optical emmision spectroscopy. A second set of discs were conditioned with either a 6% hydrogen peroxide gel (30 min), water (30 min), a carbonated beverage (2 min) or 38% orthophosphoric acid gel (2 min) followed by a three-body abrasive wear treatment (2 min) with a toothpaste slurry. Changes in height of the samples were measured with a digital comparitor. The conditioning and abrasive cycles were repeated thirteen times. RESULTS: For the elution study, the solutions gave only minor release of sodium except orthophosphoric acid which showed increased elution levels of aluminium, silicon and sodium ions. For the wear study, the orthophosphoric acid gave the highest level of wear whilst for the other treatments there were no statistical significant differences in the level of wear (one-way ANOVA). CONCLUSIONS: A 6% hydrogen peroxide solution did not cause significant dissolution, and a novel 6% hydrogen peroxide tooth whitening gel did not significantly increase the three-body wear rate of any of the materials tested.
机译：目的：要研究三种玻璃离聚物牙科材料，过氧化氢溶液对关键要素洗脱的影响，以及新型6％过氧化氢牙齿美白凝胶对随后用牙膏浆料的磨损率的影响。方法：制备三种玻璃离聚物（Chemflex，Fuji II和Ketac-Fil）的盘样标本。将一组盘暴露于磷酸盐缓冲液中6％过氧化氢，磷酸盐缓冲液，水，碳酸咖啡或38％正磷酸60分钟。通过电感耦合的等离子体光学辐射光谱法测定从盘洗脱的离子。将第二组盘用6％过氧化氢凝胶（30分钟），水（30分钟），碳酸饮料（2分钟）或38％正向磷酸凝胶（2分钟），然后是三体磨料用牙膏浆料磨损治疗（2分钟）。使用数字比较符测量样品高度的变化。重复调节和磨料循环十三次。结果：对于洗脱研究，该溶液仅对外磷酸外钠释放尿酸钠，显示出铝，硅和钠离子的洗脱水平增加。对于磨损研究，正磷酸得到最高水平的磨损，而其他治疗则没有统计学显着差异（单向ANOVA）。结论：6％过氧化氢溶液不会引起显着的溶解，新的6％过氧化氢牙齿美白凝胶没有显着增加所测试任何材料的三体磨损率。

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