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Ceramics-Silikáty |
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REPAIR BOND STRENGTH, SURFACE ROUGHNESS, AND TOPOGRAPHIC ASSESSMENT OF NANOCOMPOSITE CERAMICS WHEN SURFACE MODIFIED WITH A NANOSECOND LASER; LOW-LEVEL LASER THERAPY ACTIVATED MALACHITE GREEN AND TRI-BIOCHEMICAL SILICA
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Samran Abdulaziz 1, El Bahra Shadi 2, Alsaeed Ali Y. 3, Hasan Alshehri Faisal 4, AlTowayan Sarah AbdulRahman 5, Zubairuddin Ahmed Syed 6, Luddin Norhayati 7, Shaheen Nasser 8, Mekkey AbdAllah M 9
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1 Dept of Restorative and Prosthetic Dentistry, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia
2 Department of Prosthodontics, RAK College of Dental Sciences, RAK Medical & Health Sciences University, Ras Al Khaimah, PO Box: 11172, United Arab Emirates.
3 Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, Asir, Kingdom of Saudi Arabia.
4 Restorative Dental Science College of Dentistry, King Khalid University, Abha, Saudi Arabia
5 Assistant Professor in Restorative Dentistry, Department of Conservative Dental Sciences, College of Dentistry, Qassim University, Kingdom of Saudi Arabia
6 Department of Restorative Dental Sciences, Imam Abdul Rahman Bin Faisal University Dammam, Saudi Arabia
7 Department of Restorative Dentistry, School of Dental Sciences, University Sains Malaysia, Kubang Kerian, Kota Bharu 16150, Kelantan, Malaysia
8 Department of Restorative and Prosthetic Dental Sciences, College of Dentistry,
Dar Al Uloom University, Riyadh, Saudi Arabian
9 Fixed prosthodontics Department Faculty of Oral and Dental Medicine South Valley University, Egypt
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Keywords: Nanocomposite ceramics, Tribochemical silica coating, Nanosecond laser, Malachite green
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The impact of different surface modifiers, i.e., tri-biochemical silica coating (TBC), low-level laser therapy (LLLT) using malachite green (MG) and a nanosecond (ns) laser on the surface roughness (Ra) and repair bond strength of a nanocomposite ceramic (NCC) to a composite was elucidated upon. NCC discs were manufactured by utilising prefabricated blocks and underwent disinfection. These discs were subsequently categorised into four groups at random, applying various surface modifiers (n=16) - Group 1: HFA ⁺ S; Group 2: TBC ⁺ S; Group 3: LLLT (MG) ⁺ S and Group 4: ns laser ⁺ S. A topographic evaluation following surface modification was performed using Scanning Electron Microscopy (SEM). An Ra analysis was performed on five specimens using a surface profilometer. A composite was applied to repair the ceramic surface, where the repair bond strength and failure mode assessment was performed utilising a universal testing machine and stereomicroscope, respectively. The data were analysed using a one-way analysis of variance (ANOVA), and Tukey’s post-hoc test, with p˂0.05 deemed significant. The highest Ra values (1558.38 ± 0.022 µm) and repair bond strength (18.22 ± 0.19 MPa) of the NCC were observed in Group 2 (TBC) samples. However, the Group 3 LLLT-MG pre-treated samples exhibited the lowest roughness (1009.24 ± 0.021 µm) and bond strength (13.18 ± 0.32 MPa) values. A tribochemical silica coating and nanosecond laser can be used as an alternative conditioning regime for nanocomposite ceramics as they positively influence the repair bond strength and Ra. |
doi: 10.13168/cs.2025.0002
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