Öztürk Elif, Bolay Sükran, Hickel Reinhard, Ilie Nicoleta
Department of Restorative Dentistry, Faculty of Dentistry, Hacettepe University , Ankara , Turkey.
Acta Odontol Scand. 2014 Oct;72(7):543-8. doi: 10.3109/00016357.2013.876661. Epub 2014 Feb 4.
The aim of this study was to evaluate the micromechanical properties of different adhesive bonding agents when polymerized through ceramics.
Sixty sound extracted human third molars were selected and the crowns were sectioned perpendicular to the long axis in order to obtain dentin slices to be bonded with one of the following adhesives: Syntac/Heliobond (Ivoclar-Vivadent) or Adper-Scotchbond-1XT (3M-ESPE). The adhesives were cured by using a LED-unit (Bluephase®, Ivoclar Vivadent) with three different curing times (10 s, 20 s and 30 s) under two ceramics (IPS-e.max-Press, Ivoclar-Vivadent; IPS-Empress®CAD, Ivoclar-Vivadent) of different thicknesses (0 mm, 0.75 mm, 2 mm). Thirty groups were included, each containing 60 measurements. Micromechanical properties (Hardness, HV; indentation modulus, E; and creep, Cr) of the adhesives were measured with an automatic microhardness indenter (Fisherscope H100C, Germany). Data were statistically analyzed by using one-way ANOVA and Tukey's post-hoc test, as well as a multivariate analysis to test the influence of the study parameters (SPSS 18.0).
Significant differences were observed between the micromechanical properties of the adhesives (p < 0.05). The ceramic type showed the highest effect on HV (Partial-eta squared (η(2)) = 0.109) of the tested adhesives, while E (η(2) = 0.275) and Cr (η(2) = 0.194) were stronger influenced by the adhesive type. Ceramic thickness showed no effect on the E and Cr of the adhesives.
The adhesive bonding agents used in this study performed well by curing through different thicknesses of ceramics. The micromechanical properties of the adhesives were determined by the adhesive type and were less influenced by ceramic type and curing time.
本研究旨在评估不同粘接剂在透过陶瓷材料聚合时的微观力学性能。
选取60颗完整拔除的人类第三磨牙，将牙冠垂直于长轴进行切片，以获取牙本质薄片，用以下粘接剂之一进行粘接：Syntac/Heliobond（义获嘉伟瓦登特公司）或Adper-Scotchbond-1XT（3M-ESPE公司）。使用LED光固化机（Bluephase®，义获嘉伟瓦登特公司）在两种不同厚度（0mm、0.75mm、2mm）的陶瓷材料（IPS-e.max-Press，义获嘉伟瓦登特公司；IPS-Empress®CAD，义获嘉伟瓦登特公司）下，对粘接剂进行三种不同固化时间（10秒、20秒和30秒）的固化。共纳入30组，每组包含60次测量。使用自动显微硬度压头（德国Fisherscope H100C）测量粘接剂的微观力学性能（硬度，HV；压痕模量，E；以及蠕变，Cr）。数据采用单因素方差分析和Tukey事后检验进行统计学分析，同时进行多因素分析以检验研究参数的影响（SPSS 18.0）。
观察到粘接剂的微观力学性能之间存在显著差异（p < 0.05）。陶瓷类型对所测试粘接剂硬度（HV）的影响最大（偏η平方（η(2)） = 0.109），而弹性模量（E）（η(2) = 0.275）和蠕变（Cr）（η(2) = 0.194）受粘接剂类型的影响更大。陶瓷厚度对粘接剂的弹性模量和蠕变无影响。
本研究中使用的粘接剂在透过不同厚度的陶瓷材料固化时表现良好。粘接剂的微观力学性能由粘接剂类型决定，受陶瓷类型和固化时间的影响较小。
