The effect of resin infiltration and oxidative pre-treatment on microshear bond strength of resin composite to hypomineralised enamel
The effect of resin infiltration and oxidative pre-treatment on microshear bond strength of resin composite to hypomineralised enamel
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DOI：
10.1111/ipd.12069
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发表时间：
2014-07-01
影响因子：
3.8
通讯作者：
Palamara, Joseph E. A.
中科院分区：
文献类型：
--
作者：
Chay, Pui Ling;Manton, David J.;Palamara, Joseph E. A.
背景。树脂复合材料与低矿化牙釉质的结合强度降低会增加牙釉质的修复失败。为了研究树脂复合材料与低矿化牙釉质的附着力是否可以通过预处理来改善：树脂浸润，氧化预处理后再进行树脂浸润，或氧化预处理。5组各21个牙釉质标本：1)正常牙釉质；2)低矿化牙釉质；3)用树脂浸渍剂预处理的低矿化牙釉质（图示(R)）；4)用5.25%次氯酸钠预处理低矿化牙釉质，再用树脂浸渍剂处理；5)用5.25%次氯酸钠预处理低矿化牙釉质。使用Clearfil tse粘结剂将树脂复合棒粘结在每个试样上（以下称为“常规粘结”），然后进行微剪切粘结强度（MSBS）测试。总体而言，五组之间的平均MSBS差异显著（P = 0.001）。第4组和第5组在常规粘接前用5.25%次氯酸钠预处理低矿化牙釉质，与第2组和第3组相比，平均MSBS值增加，与常规粘接与正常牙釉质相比，平均MSBS值没有显著差异。用5.25%次氯酸钠对低矿化牙釉质样品进行预处理，或不进行后续树脂浸润，均可提高树脂复合材料与低矿化牙釉质的结合强度。
Background. Reduced bond strengths of resin composites to hypomineralised enamel increase restorative failure.Aim. To investigate if the adhesion of resin composite to hypomineralised enamel can be improved by pre-treatments: resin infiltration, oxidative pre-treatment followed by a resin infiltration, or oxidative pre-treatment.Design. Twenty-one enamel specimens in each of five Groups: 1) Normal enamel; 2) Hypomineralised enamel; 3) Hypomineralised enamel pre-treated with a resin infiltrant, (Icon (R)); 4) Hypomineralised enamel pre-treated with 5.25% sodium hypochlorite then treatment with resin infiltrant; 5) Hypomineralised enamel pre-treated with 5.25% sodium hypochlorite. A resin composite rod was bonded to each specimen using Clearfil T SE bond as the adhesive (hereafter termed 'routine bonding'), then subjected to microshear bond strength (MSBS) testing.Results. Overall, the mean MSBS between the five groups differed significantly (P = 0.001). Pre-treatment of hypomineralised enamel with 5.25% sodium hypochlorite with or without subsequent resin infiltration in Groups 4 and 5 prior to routine bonding resulted in increased mean MSBS compared to Groups 2 and 3, with mean MSBS values not differing significantly when compared to routine bonding to normal enamel.Conclusion. Increased bond strength of resin composite to hypomineralised enamel was obtained by pre-treatment of hypomineralised enamel specimens with 5.25% sodium hypochlorite with or without subsequent resin infiltration.