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Effect of various intermediate ceramic layers on the interfacial stability of zirconia core and veneering ceramics

Cited 9 time in Web of Science Cited 10 time in Scopus
Authors
Yoon, Hyung-In; Yeo, In-Sung; Yi, Yang-Jin; Kim, Sung-Hun; Lee, Jai-Bong; Han, Jung-Suk
Issue Date
2015
Publisher
Informa Healthcare
Citation
Acta Odontologica Scandinavica, vol.73, pp. 488-495
Keywords
Zirconia ceramicveneer ceramicintermediate ceramicthermocyclinginterface
Abstract
Objectives. The purposes of this study were to evaluate the effects of intermediate ceramics on the adhesion between the
zirconia core and veneer ceramics. Materials and methods. The polished surfaces of fully sintered Y-TZP blocks received
three different treatments: (1) connector (C), (2) liner (L) or (3) wash layer (W). All the treated zirconia blocks were veneered
with either (a) fluorapatite glass-ceramic (E) or (b) feldspathic porcelain (V) and divided into four groups (CE, CV, LE and
WV). For the control group, the testing surfaces of metal blocks were veneered with feldspathic porcelain (VM). A half of the
samples in each group (n = 21) were exposed to thermocycling, while the other half of the specimens were stored at room
temperature under dry conditions. All specimens were subjected to the shear test and the failed surfaces were microscopically
examined. The elemental distribution at the zirconia core/veneer interface was analyzed. Results. The specimens in Groups
CE and CV exhibited significantly greater mean bond strength values than those in Groups LE and WV, respectively (p < 0.05).
However, the mean bond strengths significantly decreased in the connector groups (CE and CV) after thermal cycling
(p < 0.05). The elemental analysis suggested diffusion of ceramic substances into the zirconia surface. Conclusions: A glass–
ceramic based connector is significantly more favorable to core/veneer adhesion than the other intermediate ceramics evaluated
in the study. However, thermal cycling affected the bond strength at the core/veneer interface differently according to the
intermediate ceramics.
ISSN
0001-6357
Language
English
URI
http://hdl.handle.net/10371/94790
DOI
https://doi.org/10.3109/00016357.2014.986755
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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