Abstract
Aims: To evaluate the effect of sandblasting with Al2O3 particle and 30% citric acid etching on the roughness of zirconia ceramic. Materials and Methods: Thirty disks were prepared from partial sintered zirconia (IPS e.max ZirCAD MT blank disk, Ivoclar Vivadent; Schaan, Liechtenstein). Specimens were assigned randomly into three groups based on surface treatment techniques (n=10). Group I zirconia surface was left without surface treatment (control). Group II specimens were subjected to sandblasting with 110 µm Aluminum oxide particles (Al2O3) while the group III surface was treated with citric acid solution 30% for 10 minutes. The surface roughness of the zirconia was investigated using a profilometer. Data were analyzed with one-way ANOVA and Duncan’s tests at 5% level of significance. Results: Sandblasting with AL2O3 110µm significantly increased the surface roughness value of the zirconia surface. Chemical treatment with 30% citric acid did not exhibit any significant changes in comparison to the control group. Conclusions: Sandblasting with AL2O3 increased zirconia surface roughness but acid etching has no effect.
Highlights
Zirconia ceramic has been successfully used for dental prosthesis due to its superior structural properties such as esthetic, biocompatibility, and high mechanical properties [1, 2, 3]
This study aimed to evaluate and compare the influence of sandblasting with aluminum oxide particle and 30% citric acid etching on the sintered surface roughness of zirconia ceramic
The means and standard deviation (SD) of zirconia (Ra) surface roughness values following different surface treatment techniques were illustrated in Table [1]
Summary
Zirconia ceramic has been successfully used for dental prosthesis due to its superior structural properties such as esthetic, biocompatibility, and high mechanical properties [1, 2, 3]. Effective bonding of zirconia to tooth tissues is challenging when compared to silicabased ceramic material [4, 5]. Sandblasting with 50-125 μm AL2O3 particles was identified as an essential step in establishing a durable bond between the resin cement and the zirconia [6, 8]. Sandblasting may affect the mechanical characteristic of zirconia as it causes surface damage and phase transformation (tetragonal to monoclinic) by introducing flaws and reshaping the surface [17]. To avoid such drawbacks and surface damage researchers have tried other techniques
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