Melbourne Dental School, University of Melbourne, Melbourne, Victoria, Australia.
Head of Prosthodontics, Melbourne Dental School, University of Melbourne, Melbourne, Victoria, Australia.
Dent Mater. 2021 Jun;37(6):e382-e390. doi: 10.1016/j.dental.2021.02.025. Epub 2021 Mar 26.
The purpose of this laboratory study is to evaluate the application of a pre-sintered surface augmentation to zirconia (Zir) and lithium disilicate (LDS) ceramics on the delamination strength of adhesive resin cement. The applied surface augmentation was the ruling of lines to the pre-sintered surface of the ceramics.
Ninety milled Zir and sixty pressed LDS specimens (3mm×0.5mm×25mm) were created and divided into five groups (n=30). Group 1: Zir no surface treatment (control Zir-NT); Group 2: Zir airborne particle abraded (Zir-APA) with 30μm CoJet; Group 3: Zir pre-sintered surface augmentation (Zir-SA); Group 4: LDS etched (control LDS-etched) and; Group 5: LDS with pre-sintered surface augmentation and etching (LDS-SA). A resin adhesive cement (3mm×1mm×8mm) was then applied and cured to the ceramic specimens. The delamination strength values of the resin cement from the ceramic were recorded. The delamination strength data were analysed statistically using one-way ANOVA and Turkey post hoc analysis.
The mean delamination strength and standard deviation, when comparing only the Zir-SA to the resin cement were statistically different (p<0.001); Zir-SA 63.42±11.85, Zir-NT 26.82±12.07, and Zir-APA 48.11±17.85MPa. Comparison between LDS groups were not significantly different (p=0.193); LDS-etched 33.49±16.07 and LDS-SA 28.83±10.15MPa. The delaminated Weibull modulus was highest for surface augmentation Zir specimens (m=13.56) but decreasing to less than half for Zir-APA (m=6.27) and Zir-NT (m=5.68). The Weibull values for the LDS-SA and LDS-etched specimens was 5.63 and 3.38 respectively.
Incorporating the pre-sintered surface augmentation to zirconia improved the delamination strength and reliability of Zir to the resin cement but not for LDS.
本实验室研究的目的是评估预烧结表面增强对氧化锆（Zr）和锂硅二酸盐（LDS）陶瓷分层强度的应用。应用的表面增强是对陶瓷预烧结表面进行划线处理。
制作了 90 个铣削氧化锆和 60 个压制 LDS 试件（3mm×0.5mm×25mm），并分为五组（n=30）。第 1 组：Zr 无表面处理（对照 Zr-NT）；第 2 组：Zr 用 30μm CoJet 进行空气颗粒喷砂处理（Zir-APA）；第 3 组：Zr 预烧结表面增强（Zir-SA）；第 4 组：LDS 蚀刻（对照 LDS-蚀刻）；第 5 组：LDS 预烧结表面增强和蚀刻（LDS-SA）。然后将树脂粘结剂（3mm×1mm×8mm）施加并固化到陶瓷试件上。记录陶瓷与树脂粘结剂的分层强度值。使用单向方差分析和 Turkey 事后检验对分层强度数据进行统计学分析。
仅比较 Zir-SA 与树脂粘结剂时，平均分层强度和标准偏差具有统计学差异（p<0.001）；Zir-SA 为 63.42±11.85，Zr-NT 为 26.82±12.07，Zir-APA 为 48.11±17.85MPa。LDS 组之间的比较没有显著差异（p=0.193）；LDS-蚀刻为 33.49±16.07，LDS-SA 为 28.83±10.15MPa。表面增强 Zr 试件的分层威布尔模数最高（m=13.56），但 Zir-APA（m=6.27）和 Zir-NT（m=5.68）的威布尔模数降低了一半以上。LDS-SA 和 LDS-蚀刻试件的威布尔值分别为 5.63 和 3.38。
将预烧结表面增强应用于氧化锆可提高氧化锆与树脂粘结剂的分层强度和可靠性，但对 LDS 则不然。
