Preliminary communication
https://doi.org/10.15644/asc47/2/8
Investigation of Glazed Y-TZP Dental Ceramics Corrosion by Surface Roughness Measurement
Sanja Štefančić
; Dental Polyclinic Zagreb, Zagreb, Croatia
Lidija Ćurković
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Gorana Baršić
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Marijana Majić-Renjo
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Ketij Mehulić
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
Introduction: Among dental applications, the zirconia based ceramics are widespread because of their general properties. The changes in superficial surface roughness correspond to the structural changes in the material caused by the influence of corrosion. The aim of this study was to determine chemical stability of glazed Y-TZP using surface roughness measurements. Materials and methods: Five samples of Y-TZP material BruxZir (Glidewell Laboratories © 2012.) with the addition of pigment A3 were sintered, polished and glazed to imitate the finishing process in producing monolithic crowns. After determining the mass of the sample, each sample was immersed in 10 ml of 4 wt. % CH3COOH aqueous solution. The roughness was measured five times before and after immersion. Results: All measured roughness parameters have significantly increased, showing higher penetration depth in all surface areas after immersion in 4 wt. % CH3COOH aqueous solution compared to the initial values. Weight loss of investigated dental ceramics samples was 2.45 mg/cm2 ± 0.026. Conclusion: Highly acidic conditions augment surface roughness of Y-TZP glazed dental ceramics.
Keywords
Dental Porcelain; Surface Properties; Corrosion
Hrčak ID:
104985
URI
Publication date:
4.7.2013.
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