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BMC Oral Health
Published in: BMC Oral Health 1/2022

Open Access 01-12-2022 | Laser | Research

Surface roughness and characteristics of CAD/CAM zirconia and glass ceramics after combined treatment procedures

Authors: Sibel Dikicier, Cumhur Korkmaz, Arzu Atay

Published in: BMC Oral Health | Issue 1/2022

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Abstract

Background

The roughening of the inner surface of a fixed ceramic restoration is an important factor for the bonding process. The aim of this study is to investigate the effect of combined surface treatments (acid etching, air-abrasion and Er: YAG Laser) on surface roughness of CAD/CAM fabricated zirconia (ZrO2) and lithium-disilicate glass ceramics (LDS).

Methods

Sixty ZrO2 (Ceramill Zi) and LDS (IPS e.max CAD) specimens, (5 mm in width, 5 mm in length and 1.5 mm in height) were fabricated using CAD/CAM and sintered according to the manufacturer’s instructions. All specimens subjected to three surface treatment combinations; etching with 4% hydrofluoric acide (HF), airborne-particle abrasion with 110-μm alumina (Al2O3) (AP) and Er:YAG laser (Er:YAG) (Group A—HF + AP; Group B—Er:YAG + AP, and Group C—Er:YAG + HF). Perthometer was used to measure the surface roughness of the specimens before and after the tretments.

Results

Group A presented the highest Ra (LDS 0.81 ± 0.27 and ZrO2 0.67 ± 0.21 after treatment) and Group C the lowest (LDS 0.45 ± 0.13 and ZrO2 0.26 ± 0.07, after treatment). Compared with before treatment, the Ra were significantly different only in Group A both ZrO2 and LDS after treatment (p < 0.05). Qualitative SEM images suggested the surface topography of the ZrO2 was smoother than the LDS. Less surface changes were observed in the Er:YAG combined procedures than HF + AP.

Conclusions

HF + AP was significantly succesful in modifying the ceramic surface. Er:YAG did not sufficiently promote the surface topography, even if combined with any other treatments. Overall, surface tretments on ZrO2 not easier than LDS.
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Metadata
Title
Surface roughness and characteristics of CAD/CAM zirconia and glass ceramics after combined treatment procedures
Authors
Sibel Dikicier
Cumhur Korkmaz
Arzu Atay
Publication date
01-12-2022
Publisher
BioMed Central
Keyword
Laser
Published in
BMC Oral Health / Issue 1/2022
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-022-02389-7

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