The Effect of Hydrofluoric Acid Etching Duration on the Surface Micromorphology, Roughness, and Wettability of Dental Ceramics

The current laboratory study is evaluating the effect of hydrofluoric acid etching duration on the surface characteristics of five silica-based glass ceramics. Changes in the pore pattern, crystal structure, roughness, and wettability were compared and evaluated. Seventy-five rectangularly shaped sp...

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Bibliographic Details
Published in:International journal of molecular sciences 2016-05, Vol.17 (6), p.822-822
Main Authors: Ramakrishnaiah, Ravikumar, Alkheraif, Abdulaziz A, Divakar, Darshan Devang, Matinlinna, Jukka P, Vallittu, Pekka K
Format: Article
Language:English
Subjects:
acid etching
Biomedical materials
Ceramics
Ceramics - chemistry
dental ceramics
Dental Materials - chemistry
Dental research
Etching
Hydrofluoric Acid - chemistry
lithium disilicate glass ceramics
Materials Testing
micromorphology
Random Allocation
Surface Properties
Surface roughness
Wettability
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Summary:The current laboratory study is evaluating the effect of hydrofluoric acid etching duration on the surface characteristics of five silica-based glass ceramics. Changes in the pore pattern, crystal structure, roughness, and wettability were compared and evaluated. Seventy-five rectangularly shaped specimens were cut from each material (IPS e-max™, Dentsply Celtra™, Vita Suprinity™, Vita mark II™, and Vita Suprinity FC™); the sectioned samples were finished, polished, and ultrasonically cleaned. Specimens were randomly assigned into study groups: control (no etching) and four experimental groups (20, 40, 80 and 160 s of etching). The etched surfaces' microstructure including crystal structure, pore pattern, pore depth, and pore width was studied under a scanning electron microscope, and the surface roughness and wettability were analyzed using a non-contact surface profilometer and a contact angle measuring device, respectively. The results were statistically analyzed using one-way analysis of variance (ANOVA) and the post hoc Tukey's test. The results showed a significant change in the pore number, pore pattern, crystal structure, surface roughness, and wettability with increased etching duration. Etching for a short time resulted in small pores, and etching for longer times resulted in wider, irregular grooves. A significant increase in the surface roughness and wettability was observed with an increase in the etching duration. The findings also suggested a strong association between the surface roughness and wettability.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms17060822