Doctorate School for Sciences and Technology, Lebanese University, Beirut, Lebanon.
Research Platform of Nanosciences and Nanotechnologies, Faculty of Sciences, Lebanese University, Beirut, Lebanon.
Biomed Res Int. 2018 May 27;2018:1803425. doi: 10.1155/2018/1803425. eCollection 2018.
This study evaluated the effect of air abrasion before and after sintering with different particle type, shape, and size on the surface morphology, monoclinic phase transformation, and bond strength between resin cement and zirconia surface using primer containing silane and MDP. Airborne particle abrasion (APA) was performed on zirconia before and after sintering with different particle shape and size (50 m AlO and 25 m silica powder). 120 square shaped presintered zirconia samples (Amann Girrbach) were prepared (3 mm height × 10 mm width × 10 mm length) and polished with grit papers #800, 1000, 1200, 1500, and 2000. Samples were divided into 6 groups according to surface treatment-group A: (control) no surface treatment; group B: APA 50 m AlO before sintering (BS); group C: APA 50 m AlO after sintering (AS); group D: APA25 m silica powder (BS); group E: APA25 m silica powder (AS) at a pressure of 3.5 bar; and group F: APA 25 m silica powder (AS) at a pressure of 4 bar. Samples were analyzed using XRD, AFM, and SEM. The samples were submitted to shear bond strength (SBS) test. A dual cure resin cement (RelyX Ultimate) and primer (Scotchbond Universal) were used. Data were analyzed with ANOVA and Tukey test ( ≥ 0.05). APA in group B significantly increased the surface roughness when compared to all other groups. A significant monoclinic phase transformation (t-m) value was observed in groups C and F and a reverse transformation occurred in presintered groups. The SBS value of group A was 11.58 ± 1.43 and the highest significant shear bond strength value was for groups B (15.86 ± 1.92) and C (17.59 ± 2.21 MPa) with no significant difference between them. . The use of APA 50 m AlO before sintering and the application of primer containing MDP seem to be valuable methods for durable bonding with zirconia. The use of APA 50 m AlO after sintering induced the highest (t-m) phase transformation.
本研究评估了不同颗粒类型、形状和大小的空气喷砂（air abrasion）在前烧结和后烧结阶段对表面形貌、单斜相转变以及树脂水门汀与氧化锆表面结合强度的影响，使用含硅烷和 MDP 的底涂剂。使用不同形状和大小的颗粒（50μm AlO 和 25μm 二氧化硅粉末）对前烧结和后烧结的氧化锆进行空气喷砂（air abrasion，APA）。制备 120 个预烧结方形氧化锆样本（Amann Girrbach）（3mm 高×10mm 宽×10mm 长），并用砂纸 #800、1000、1200、1500 和 2000 进行打磨。根据表面处理方式将样本分为 6 组：- 组 A：（对照）无表面处理；- 组 B：前烧结阶段的 50μm AlO APA（BS）；- 组 C：后烧结阶段的 50μm AlO APA（AS）；- 组 D：BS 阶段的 25μm 二氧化硅粉末 APA；- 组 E：AS 阶段的 25μm 二氧化硅粉末 APA（3.5 巴压力）；- 组 F：AS 阶段的 25μm 二氧化硅粉末 APA（4 巴压力）。使用 XRD、AFM 和 SEM 对样本进行分析。对样本进行剪切结合强度（SBS）测试。使用双重固化树脂水门汀（RelyX Ultimate）和底涂剂（Scotchbond Universal）。使用方差分析和 Tukey 检验（≥0.05）对数据进行分析。与其他所有组相比，BS 组的 APA 显著增加了表面粗糙度。C 组和 F 组观察到显著的单斜相转变（t-m）值，预烧结组发生了相反的转变。A 组的 SBS 值为 11.58±1.43，B 组和 C 组的剪切结合强度值最高（15.86±1.92），且两组之间无显著差异。使用前烧结阶段的 50μm AlO APA 和含有 MDP 的底涂剂似乎是与氧化锆实现持久结合的有效方法。后烧结阶段的 50μm AlO APA 的使用导致了最高的（t-m）相转变。
