Assessment of the degree of conversion in light-curing orthodontic resins with various viscosities

IF 1.68 Q2 Dentistry Applied Adhesion Science Pub Date : 2015-12-22 DOI:10.1186/s40563-015-0055-z

Lorenna Oliveira Fernandes de Araujo, Osmar Barreto, Adriano Augusto Melo de Mendonça, Rodrigo França

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引用次数: 10

Abstract

The aim of this study was to determine the degree of conversion (DC) for five orthodontic resins with different viscosities, to examine a probable relationship between the viscosity factor and the degree of conversion of the materials.

Five commercially-available light-cured orthodontic bonding resins were used in this study: two medium viscosity resins [transbond XT (TR); opal bond MV (OB)]; two low viscosity resins [vertise flow (VF); opal bond flow (OF)]; and a fluoride-releasing sealant [opal seal (OS)]. The specimens were made and polymerized for 20?s. Fourier Transformed Infrared spectroscopy (FTIR) was used to assess the DC of carbon-carbondouble bonds from all samples.

The DC was significantly different among the materials: (TR, 24.6?±?0.04?%; OB, 39?±?0.02?%; VF, 44.3?±?0.01?%; OS, 52.5?±?0.01?%; OF, 53?±?0.04?%; p?<?0.05) and the lowest viscosity materials had the highest DC values.

The resins studied have different DC values, which can be explained by the unique composition of each brand of resin. There is a relationship between the viscosity of a material and its degree of conversion, which is shown in this study by the two low-viscosity orthodontic resins that had a higher DC.

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不同粘度光固化正畸树脂转化程度的评价

本研究的目的是确定五种不同粘度的正畸树脂的转化程度(DC)，以检查粘度因子与材料转化程度之间的可能关系。本研究使用了五种市售光固化正畸粘接树脂:两种中等粘度树脂[transbond XT (TR);蛋白石键MV (OB)];两种低粘度树脂[广告流量(VF);蛋白石键流[OF];以及释放氟化物的密封剂[蛋白石密封剂(OS)]。制作标本并进行20?s的聚合。利用傅里叶变换红外光谱(FTIR)对所有样品的碳-碳双键DC进行了测定。不同材料间DC差异显著:(TR, 24.6±0.04 %;OB, 39 ?±0.02 ? %;VF, 44.3 ?±0.01 ? %;操作系统,52.5 ?±0.01 ? %;53 ?±0.04 ? %;p?<?0.05)，黏度最低的材料DC值最高。所研究的树脂具有不同的DC值，这可以解释为每个品牌树脂的独特组成。材料的粘度与其转化程度之间存在关系，在本研究中，两种具有较高DC的低粘度正畸树脂表明了这一点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Adhesion Science Dentistry-Dentistry (miscellaneous)

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审稿时长

13 weeks

期刊介绍： Applied Adhesion Science focuses on practical applications of adhesives, with special emphasis in fields such as oil industry, aerospace and biomedicine. Topics related to the phenomena of adhesion and the application of adhesive materials are welcome, especially in biomedical areas such as adhesive dentistry. Both theoretical and experimental works are considered for publication. Applied Adhesion Science is a peer-reviewed open access journal published under the SpringerOpen brand. The journal''s open access policy offers a fast publication workflow whilst maintaining rigorous peer review process.