Abstract
INTRODUCTION: The smoothness of a ceramic’s surface is very important of its esthetic and prophylactic qualities.
 AIM: The purpose of this investigation is to study the possibilities of polishing lithium disilicate ceramics after making a correction on the glazed ceramic surface.
 MATERIALS AND METHODS: The subject of the study were 20 test samples made of lithium disilicate press ceramics. They were divided into 4 groups according to the method of processing and polishing. Group 1 was treated with a red diamond bur and polishing set; Group 2 was treated with a green diamond bur and polishing set; Group 3 was treated with a red diamond bur, polishing set and diamond paste; Group 4 was treated with a diamond bur with green coding, polishing set and diamond paste. The samples were examined with an atomic force microscope to observe the change in surface relief. The reference point for comparison was the surface of the glazed ceramic.
 RESULTS: After polishing with diamond paste, the surface became smoother compared to the treatment of the surface with a polishing kit alone.
 CONCLUSION: Regardless of the polishing protocol used, there was a difference in the topography of the ceramic surface before and after treatment.
Highlights
The smoothness of a ceramic’s surface is very important of its esthetic and prophylactic qualities
After polishing with diamond paste, the surface became smoother compared to the treatment of the surface with a polishing kit alone
Regardless of the polishing protocol used, there was a difference in the topography of the ceramic surface before and after treatment
Summary
The smoothness of a ceramic’s surface is very important of its esthetic and prophylactic qualities. The glass-ceramic materials processed by pressing have extremely high aesthetic qualities, good mechanical properties and wear resistance. Crystals with a size of 2000 - 4000 nm are observed in the structure of the pressed lithium disilicate ceramics, which is important for the polishing possibilities of this particular ceramic material according to Kisov (2019). The glazing process helps to achieve a smooth surface and retains high luster for a long period of time. The restoration is returned to the laboratory for final glazing. Unpolished ceramics can subsequently lead to a number of undesirable complications: wear of antagonists, staining, plaque retention, inflammation of the gingiva and reduction of fracture resistance as stated by Bollen et al (1997) and da Silva et al (2016). As Heintze et al (2005) and Jones et al (2004) wrote a smooth surface adds to the patient’s comfort, as already a change of surface roughness in order of 0.3μm can be detected by the tip of the patient’s tongue
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