Effect of laser and coating surface treatment on the bond strength of zirconia ceramics
10.7518/hxkq.2024.2023369
- VernacularTitle:激光及涂层表面处理对氧化锆陶瓷粘接强度的影响
- Author:
Qiao DU
1
;
Guangliang NIU
Author Information
1. 北京中西医结合医院口腔科,北京 100039
- Keywords:
zirconia;
surface treatment;
bond strength;
laser;
coating
- From:
West China Journal of Stomatology
2024;42(3):359-364
- CountryChina
- Language:Chinese
-
Abstract:
Objective This study aims to investigate bond strength between zirconia and resin cement through sur-face treatments with Er:YAG laser,Nd:YAG laser,and Si-Zr coating.Methods Seventy-five round pre-sintered zirco-nia discs with a diameter of 18 mm and a thickness of 1.5 mm were prepared by a powder compactor.Fifty discs were randomly divided into five groups of 10 discs each and were subjected to five surface treatments:no treatment(control group),sandblasting with alumina particles(sandblasting group),Er:YAG laser treatment(Er:YAG laser group),Nd:YAG laser treatment(Nd:YAG laser group),and Si-Zr coating treatment(Si-Zr coating group).The discs were then bonded to composite resin columns with resin cement.The shear bond strength of each group was tested with a universal tester.Roughness tester,scanning electron mi-croscope(SEM),and energy dispersive spectroscopy were used to analyze surface performance.Results The bond strength of the Si-Zr coating group was higher than that of the remaining groups(P<0.05).The difference in bond strength between the sandblasting group and the Er:YAG laser group was not statistically significant(P>0.05),but both of them had higher bond strength than the Nd:YAG laser group(P<0.05).The Si-Zr coating group had the highest sur-face roughness(P<0.05).The surface roughness of the sandblasting,Er:YAG laser,and Nd:YAG laser groups was high-er than that of the control group(P<0.05),but the difference among the three groups was not statistically significant(P>0.05).SEM observations showed irregular scratches on the surface of the sandblasting group and large pits with holes on the surface of the Er:YAG and Nd:YAG laser groups.In the Er:YAG laser group,the crystal structure was replaced by a smooth surface with a large amount of microcracks due to partial melting.Complex porous structures that comprised"is-land-like"structures and mass pores among the grains were observed on the surface of the Si-Zr coating.Only Zr,O,and Y were detected on the surfaces of the control,Er:YAG laser,and Nd:YAG laser groups.Al was found on the surface of the sandblasted group,and a higher proportion of Si was detected on the surface of the Si-Zr coating group.Conclusion Er:YAG laser and Nd:YAG laser treatment on the zirconia ceramic surface could increase roughness and improve the bond strength to resin cement.Si-Zr coating treatment is an effective alternative for increasing the roughness and bond strength of zirconia surface and is superior to sandblasting and laser treatments.
