TY  - JOUR
AU  - LIN, Shi-yao
AU  - LIU, Lang
AU  - LI, Jie-yin
AU  - WEN, Xiao-shan
AU  - YE, Xiu-hua
AU  - YE, Jian-tao
PY  - 2016
TI  - The effect of heat treatment on bonding strength of ceramic to cast nickel-chromium-based alloys
JO  - Journal of Prevention and Treatment for Stomatological Diseases
SN  - 2096-1456
SP  - 331
EP  - 335
VL  - 24
IS  - 6
AB  - ObjectiveTo explore the effect of heat treatments on the metal-ceramic bonding strength in Ni-Cr-Ti alloy and Ni-Cr alloy.MethodsWe evaluated the metal-ceramic bond strengths by using a three-points bending test according to ISO 9693. Meanwhile, we also observed the metal-ceramic interface through scanning electronic microscope (SEM) and energy dispersive spectrum (EDS).ResultsThe mean value of bonding strengths of four groups were (38.04± 3.79) MPa (Ni-Cr-Ti, degassed), (32.17 ± 4.00) MPa (Ni-Cr-Ti, no heat treatment), (36.32 ± 7.41) MPa (Ni-Cr, degassed), (31.75±2.77) MPa (Ni-Cr, no heat treatment). The statistic analysis showed that the mean bonding strengths were affected significantly by heat treatment method (P = 0.001), but not alloy type (P = 0.484). SEM and EDS demonstrated that the bonding surfaces of degassed specimens were compacted and had no cracks unlike those of specimens not receiving heat treatment.ConclusionAccording to the test results, the metal-ceramic bonding strengths of Ni-Cr-Ti alloy and Ni-Cr alloy are close to each other, and the bonding strengths of alloys can be heightened by heat treatment.
UR  - https://doi.org/10.12016/j.issn.2096-1456.2016.06.003
DO  - 10.12016/j.issn.2096-1456.2016.06.003