Surface roughness and bacteria adhesion of full zirconia restoration after different polishing treatment

doi:10.12307/2023.174

Abstract

Abstract: BACKGROUND: The polishing treatment on the surface of the crown restoration can effectively reduce pigmentation, adhesion of plaque and abrasion of the jaw teeth.
OBJECTIVE: To investigate the effects of different polishing treatments on the surface roughness and bacterial adhesion of the full zirconia restoration.
METHODS: Totally 30 full zirconia specimens with sizes of 10 mm × 10 mm × 2 mm were prepared and divided into 5 groups randomly (n=6): control group (simple glazing treatment), polishing group (green silicon carbide sandstone, Shofu porcelain polishing kit, Ceramaster Polisher polishing), polishing paste group (green silicon carbide sandstone, Softcut PA, Shofu porcelain polishing kit, UltraII emery polishing paste), fine polishing group (green silicon carbide sandstone, Softcut PA, Shofu porcelain polishing kit, Ceramaster Polisher polishing), multi-step fine polishing group (green silicon carbide sandstone + white alumina sandstone, Softcut PA + Softcut PB, Shofu porcelain polishing kit, Ceramaster Polisher polishing). The surface roughness value, surface morphology of each specimens, and colony forming unit of bacteria on the surface of the specimens were detected after treatment.
RESULTS AND CONCLUSION: (1) The surface roughness values of specimens of the five groups from high to low were: polishing group, polishing paste group, multi-step fine polishing group, fine polishing group, control group. The value was higher in the polishing group than that in other four groups (P < 0.05). The value was higher in the polishing paste group than that in the control group, fine polishing group, and multi-step fine polishing group (P < 0.05). (2) Under the electron microscope, the specimens of control group, fine polishing group and multi-step fine polishing group had smooth surface without visible scratches. The specimens of polishing paste group had deep scratches and small particles on the surface. The specimens of polishing group had the roughest surface with noticeable scratches, deep grooves, and many irregular granular protrusions. (3) The colony forming unit in the five groups from high to low was: polishing group, polishing paste group, multi-step fine polishing group, fine polishing group, and control group. The colony forming unit was significantly higher in the polishing group than that in the other four groups (P < 0.01). (4) These results show that both the fine polishing and the multi-step fine polishing can effectively improve the finish and reduce the bacteria adhesion on the surface and have a comparable effect to glazing.

Key words: full zirconia, polishing, glazing, surface roughness, bacterial adhesion

CLC Number:

Zeng Jindi, Song Jingjing, Zhang Yuhang, Yang Zhengyi, Nie Ermin, Zhang Chunyuan, Jiang Rui. Surface roughness and bacteria adhesion of full zirconia restoration after different polishing treatment[J]. Chinese Journal of Tissue Engineering Research, 2023, 27(21): 3320-3324.

Figures/Tables 4

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