Al-Hamdan Rana Sulaiman, Almutairi Basil, Abduljabbar Tariq
Department of Restorative Dental Sciences, College of Dentistry, King Saud University, 60169, Riyadh 11545, Saudi Arabia.
Department of Restorative Dental Science (RDS), Operative Division- College of Dentistry, King Saud University, Saudi Arabia.
Photodiagnosis Photodyn Ther. 2025 Oct;55:104682. doi: 10.1016/j.pdpdt.2025.104682. Epub 2025 Jun 14.
The Impact of surface conditioning protocol i.e., Sandblasting (SB), Bioactive glasses particles (BAGPs), and Phthalocyanine (Pc) activated via low-level laser therapy (LLLT) on the surface roughness (Ra) and shear bond strength (SBS) of hybrid ceramics (HBCs) bonded to light-cure (LC) or dual-cure (DC) resin cement.
Seventy-eight HBC discs were created utilizing the CAD-CAM technique. The samples were divided into three unique groups based on the specific conditioning protocol applied (n = 26) Group 1 (SB), Group 2 (BAGPs), and Group 3 (Pc-LLLT). An evaluation of surface roughness (n = 5) and surface characterization (n = 1) was conducted using a profilometer and a scanning electron microscope (SEM). Twenty samples from each group were later divided into two separate subgroups, i.e. (A) Light-cured (LC) resin cement and dual-cured (DC) resin cement. Both types of cement were applied on LDC followed by thermocycling. A universal testing machine and a stereomicroscope were utilized for SBS testing and to assess the failure mode. ANOVA was performed in conjunction with Tukey's HSD test used to analyze the data (p < 0.05).
The highest mean Ra value was observed in Group 1 (SB) (1076.64 ± 0.025 µm). In contrast, Group 3 (Pc-LLLT) (866.12 ± 0.031 µm) conditioned samples exhibited the lowest Ra. The maximum bond integrity score was recorded in Group 1B (SB+ DC resin cement) (10.76±0.14 MPa). The minimum average bond strength was noted in Group 3A (Pc-PDT+ LC cement) (7.55±0.12 MPa) CONCLUSION: SB proved to be a suitable method for conditioning hybrid ceramics. Furthermore, dual-cure resin cement displayed better performance in terms of improving SBS as compared to light-cure resin cement.
研究表面处理方案，即喷砂（SB）、生物活性玻璃颗粒（BAGPs）和通过低水平激光疗法（LLLT）激活的酞菁（Pc）对与光固化（LC）或双固化（DC）树脂水门汀粘结的混合陶瓷（HBCs）的表面粗糙度（Ra）和剪切粘结强度（SBS）的影响。
利用CAD-CAM技术制作78个HBC圆盘。根据所应用的特定处理方案，将样本分为三个独特的组（n = 26）：第1组（SB）、第2组（BAGPs）和第3组（Pc-LLLT）。使用轮廓仪和扫描电子显微镜（SEM）对表面粗糙度（n = 5）和表面特征（n = 1）进行评估。随后，将每组的20个样本分为两个单独的亚组，即（A）光固化（LC）树脂水门汀和双固化（DC）树脂水门汀。两种类型的水门汀均应用于LDC，然后进行热循环。使用万能试验机和体视显微镜进行SBS测试并评估失效模式。采用方差分析并结合Tukey's HSD检验来分析数据（p < 0.05）。
第1组（SB）观察到最高的平均Ra值（1076.64 ± 0.025 µm）。相比之下，第3组（Pc-LLLT）（866.12 ± 0.031 µm）处理的样本显示出最低的Ra。在第1B组（SB + DC树脂水门汀）中记录到最大的粘结完整性评分（10.76±0.14 MPa）。在第3A组（Pc-PDT + LC水门汀）中注意到最低的平均粘结强度（7.55±0.12 MPa）。结论：喷砂被证明是处理混合陶瓷的合适方法。此外，与光固化树脂水门汀相比，双固化树脂水门汀在提高剪切粘结强度方面表现出更好的性能。
