The effect of thermocycling on microhardness and surface roughness of two zirconia reinforced lithium silicate glass-ceramics

Nowadays, dental glass-ceramics are experiencing remarkable development in terms of aesthetics and hardness. New materials with high fracture resistance were developed and can be obtained by milling ceramic blocks or by heat-pressing prefabricated ceramic ingots. This paper aims to evaluate the effe...

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Bibliographic Details
Published inMaterials today : proceedings Vol. 45; pp. 4247 - 4249
Main Authors Diana Vasiliu, Roxana, Dragoș Uţu, Ion, Porojan, Liliana
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2021
Subjects
Average microroughness parameter
Microhardness
Microroughness
Thermocycling
Zirconia reinforced lithium silicate glass- ceramics
Zirconia reinforced lithium silicate glass- ceramics
Microhardness
Average microroughness parameter
Thermocycling
Microroughness
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Summary:Nowadays, dental glass-ceramics are experiencing remarkable development in terms of aesthetics and hardness. New materials with high fracture resistance were developed and can be obtained by milling ceramic blocks or by heat-pressing prefabricated ceramic ingots. This paper aims to evaluate the effect of thermocycling (10,000 cycles) on the microhardness and roughness of two zirconia reinforced lithium silicate glass-ceramics (ZLS) obtained using two different processes, milling, and heat-pressing ceramic. The tested ZLS ceramics behaved differently to the aging and surface treatments. The milled ZLS ceramic was more affected by the aging process. Glazed samples presented higher surface roughness and higher microhardness compared to the polished samples before and after thermocycling.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2020.12.284