Solanke Cia, Shokoohi-Tabrizi Hassan, Schedle Andreas, Bekes Katrin
Department of Paediatric Dentistry, University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Core Facility Applied Physics, Laser and CAD/CAM Technology, University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria.
Dent J (Basel). 2025 Aug 20;13(8):377. doi: 10.3390/dj13080377.
: Reduced bond strengths in hypmineralised enamel have been reported with increased restorative failures. This study aimed to investigate the shear bond strengths of resin composite to hypomineralised enamel and dentin bonded with two different adhesive systems and pre-treatments. : Thirty-six freshly extracted first permanent molars with MIH and 17 sound third molars were used for shear bond strength tests in enamel and dentin. Specimens of control groups were bonded to resin composite using Scotchbond Universal Plus and Adper Scotchbond 1XT. MIH-affected enamel specimens of six test groups were pre-treated with various chemical agents, such as 35% phosphoric acid, 5% NaOCl, resin infiltration with ICON, or a combination of these agents prior to bonding with composite resin using Scotchbond Universal Plus. Bonded specimens were subsequently sheared at a crosshead speed of 1.0 mm/min, after which their fracture modes were recorded. The mean bond strengths of all groups were compared using a one-way analysis of variance test (ANOVA) and a Bonferroni-Holm analysis was performed for pairwise comparison between the groups. The association between modes of failure was examined with Pearson's chi-square test. : Mean shear bond strength values were highest for sound dentin specimens (Group SD 2) bonded with Scotchbond Universal Plus (23.76 ± 7.68 MPa). Sound enamel specimens (Group SE 2) exhibited significantly higher mean bond strength values than MIH-enamel specimens (Group HE 2) when bonded with Scotchbond Universal Plus (19.68 ± 6.25 vs. 11.53 ± 3.29 MPa, < 0.001). Oxidative pre-treatment followed by resin infiltration significantly improved bond strengths to hypomineralised enamel (Group HE 6) (17.84 ± 2.98 MPa, < 0.05). Bond strengths to sound and hypomineralised enamel and dentin did not differ significantly for both adhesives. : Within the limitations of an in vitro study, oxidative pre-treatment in combination with resin infiltration seems to be beneficial when planning adhesive restorations with composite in hypomineralised enamel. Both Scotchbond Universal Plus and Adper Scotchbond 1XT can be used for bonding of resin composite to MIH-affected enamel and dentin.
据报道，矿化不足的牙釉质中粘结强度降低，修复失败率增加。本研究旨在调查树脂复合材料与矿化不足的牙釉质和牙本质之间的剪切粘结强度，这些牙釉质和牙本质用两种不同的粘结系统和预处理方法进行粘结。：三十六颗新鲜拔除的患有乳牙釉质发育不全（MIH）的第一恒磨牙和十七颗健康的第三磨牙用于牙釉质和牙本质的剪切粘结强度测试。对照组的样本使用Scotchbond Universal Plus和Adper Scotchbond 1XT粘结到树脂复合材料上。六个测试组中受MIH影响的牙釉质样本在使用Scotchbond Universal Plus与复合树脂粘结之前，先用各种化学试剂进行预处理，如35%磷酸、5%次氯酸钠、用ICON进行树脂浸润，或这些试剂的组合。随后，以1.0毫米/分钟的十字头速度对粘结样本进行剪切，之后记录其断裂模式。使用单因素方差分析（ANOVA）比较所有组的平均粘结强度，并进行Bonferroni-Holm分析以进行组间的两两比较。用Pearson卡方检验检查失败模式之间的关联。：使用Scotchbond Universal Plus粘结的健康牙本质样本（SD组2）的平均剪切粘结强度值最高（23.76±7.68兆帕）。当使用Scotchbond Universal Plus粘结时，健康牙釉质样本（SE组2）的平均粘结强度值显著高于受MIH影响的牙釉质样本（HE组2）（19.68±6.25对11.53±3.29兆帕，P<0.001）。氧化预处理后进行树脂浸润显著提高了与矿化不足牙釉质的粘结强度（HE组6）（17.84±2.98兆帕，P<0.05）。两种粘结剂对健康和矿化不足的牙釉质及牙本质的粘结强度没有显著差异。：在体外研究的局限性内，在计划对矿化不足的牙釉质进行复合树脂粘结修复时，氧化预处理与树脂浸润相结合似乎是有益的。Scotchbond Universal Plus和Adper Scotchbond 1XT均可用于将树脂复合材料粘结到受MIH影响的牙釉质和牙本质上。
