Effects of different surface treatments on the shear bond strength of veneering ceramic materials to zirconia
Abdullah Adil Othman, Hui Yu, Sun Xudong, Pollington Sarah, Muhammed Fenik Kaml, Liu Yi,
소속 상세정보
( Abdullah Adil Othman ) - China Medical University School and Hospital of Stomatology
( Hui Yu ) - Dalian University School of Environmental and Chemical Engineering
( Sun Xudong ) - Dalian University School of Environmental and Chemical Engineering
( Pollington Sarah ) - University of Sheffield School of Clinical Dentistry
( Muhammed Fenik Kaml ) - China Medical University School and Hospital of Stomatology
( Liu Yi ) - China Medical University School and Hospital of Stomatology
Abstract
PURPOSE: To evaluate and compare the effect of different materials and techniques on the shear bond strength of veneering ceramic materials to zirconia.
MATERIALS AND METHODS: 136 sintered zirconia cubes were prepared and randomly divided into four study groups according to corresponding methods of surface treatment and materials: GLN (grinding followed by laser scanning using Noritake Cerabien ZR), SLN (sandblasting followed by laser scanning using Noritake Cerabien ZR), GLV (grinding followed by laser scanning using VITA VM 9), and SLV (sandblasting followed by laser scanning using VITA VM 9). Spraying technique was performed to coat the core. Profilometer, SEM, XRD, EDS, universal testing machine, and stereomicroscope were used to record surface roughness Ra, surface morphology, phase transformation, elemental compositions, shear bond strength SBS values, and failure types, respectively. Specimens were investigated in unaged (not immersed in artificial saliva) and aged (stored in artificial saliva for a month) conditions to evaluate SBS values.
RESULTS: Grinding and GLN as first and second surface treatments provided satisfactory Ra values in both conditions (1.05 ± 0.24 μm, 1.30 ± 0.21 μm) compared to sandblasting and other groups (P<.05). The group GLN showed the highest SBS values in both conditions (30.97 ± 3.12 MPa, 29.09 ± 4.17 MPa), while group SLV recorded the lowest (23.96 ± 3.60 MPa, 22.95 ± 3.68 Mpa) (P<.05). Sandblasting showed phase transformation from t-m. Mixed failure type was the commonest among all groups.
CONCLUSION: GLN showed to be a reliable method which provided satisfactory bond strength between the veneer ceramic and zirconia. This method might preserve the integrity of fixed dental crowns.
키워드
Zirconia; Veneer ceramic; Surface treatment; Laser scanning; Shear bond strength
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