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Kwon, Sung-Min; Min, Bong Ki; Kim, Young Kyung; Kwon, Tae-Yub
Materials, 12/2020, Letnik: 13, Številka: 24Journal Article
The influence of residual stress induced by sandblasting the zirconia ceramic surface on the resin bonding to the ceramic is still unclear. The effect of four different sandblasting conditions (with 50 and 110 μm alumina at pressures of 0.2 and 0.4 MPa) on the bonding of adhesive resin cement (Panavia F 2.0) to zirconia (Cercon ht) was investigated in terms of residual stress. The surface roughness and water contact angle of the zirconia surfaces were measured. The tetragonal-to-monoclinic (t-m) phase transformation and residual stresses (sin method) were studied by X-ray diffraction. The resin-bonded zirconia specimens were subjected to shear bond strength (SBS) tests before and after thermocycling (10,000 and 30,000 cycles) ( = 10). As the particle size and pressure increased, the roughness gradually and significantly increased ( = 0.023). However, there were no significant differences in roughness-corrected contact angle among all the sandblasted groups ( > 0.05). As the particle size and pressure increased, the m-phase/(t-phase + m-phase) ratios and compressive residual stresses gradually increased. After thermocycling, there were no significant differences in SBS among the sandblasted zirconia groups ( > 0.05). In conclusion, increased surface roughness and residual stress do not directly affect the resin bonding durability.
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in: SICRIS
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