Department of Bioengineering, Sydney Dental School, Faculty of Medicine and Health, The University of Sydney, Westmead, NSW, 2145, Australia.
Department of Prosthetic Dentistry, Prince of Songkla University, Songkhla, 90110, Thailand.
Dent Mater. 2019 Jan;35(1):105-113. doi: 10.1016/j.dental.2018.11.001. Epub 2018 Nov 24.
The aims of this study were to compare micro-tensile bond strength and characterize the bond of ceramic-coated versus air-abraded and chemically treated zirconia specimens.
Eight zirconia blocks were fabricated and assigned to two groups as follows: AA-alumina air-abrasion; and CC-DCMhotbond coating followed by alumina air-abrasion and hydrofluoric acid etching. For each group, two identically pre-treated zirconia blocks were applied G-Multi Primer, cemented together with G-Cem Linkforce cement and cut into 30 stick-shaped specimens (1×1×9mm). A total of 120 specimens were stored in distilled water for 24h and then assigned to three groups: (i) short-term test, (ii) thermocycling for 5000, and (iii) thermocycling for 10,000 cycles. The specimens were tested in tensile mode. The bond strength results were analyzed using two-way ANOVA, followed by one-way ANOVA and Dunnett T3 (α=0.05). Failure mode and surfaces were analyzed with optical microscopy and SEM. The EDS, FTIR, XRD, and FIB-SEM were used for chemical, crystalline phase analyses.
The AA groups recorded higher mean bond strength than the CC groups in all aging conditions. Thermocycling did not affect the bond strength of the AA groups, whereas the bond strength of the CC groups decreased significantly after aging. The MDP monomer and silane in G-Multi Primer chemically reacted with mechanically pre-treated AA and CC surfaces via the absorption of P-O and Si-O groups.
The bond strength of a conventional protocol involving alumina air-abrasion was greater than ceramic coating technique.
本研究旨在比较微拉伸粘结强度，并对经陶瓷涂层处理与经空气喷砂和化学处理的氧化锆试件的粘结情况进行特征描述。
制备 8 个氧化锆块并分为两组：AA-氧化铝喷砂；CC-DCM 热键涂层，随后进行氧化铝喷砂和氢氟酸蚀刻。对于每组，两个经过相同预处理的氧化锆块均应用 G-Multi Primer 处理，用 G-Cem Linkforce 粘结剂粘结在一起，并切成 30 个棒状试件（1×1×9mm）。总共 120 个试件在蒸馏水中储存 24 小时，然后分为三组：（i）短期测试；（ii）热循环 5000 次；（iii）热循环 10000 次。对试件进行拉伸测试。使用双向方差分析（ANOVA）分析粘结强度结果，然后使用单向方差分析（ANOVA）和 Dunnett T3（α=0.05）进行分析。使用光学显微镜和 SEM 分析粘结失效模式和表面形貌。使用能量色散光谱（EDS）、傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）和聚焦离子束扫描电子显微镜（FIB-SEM）进行化学、结晶相分析。
在所有老化条件下，AA 组的平均粘结强度均高于 CC 组。热循环未影响 AA 组的粘结强度，但 CC 组的粘结强度在老化后显著下降。G-Multi Primer 中的 MDP 单体和硅烷通过吸收 P-O 和 Si-O 基团与机械预处理的 AA 和 CC 表面发生化学相互作用。
传统的氧化铝喷砂方案的粘结强度大于陶瓷涂层技术。
