Surface roughness and Hardness of Translucent Zirconia with different Post-sintering interventions. | ||||
| Al-Azhar Journal of Dental Science | ||||
| Volume 26, Issue 4, October 2023, Page 439-447 PDF (1.47 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajdsm.2023.225810.1443 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Soha Osama Nabih   1; Fatma Adel Mohamed Ahmed 2
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| 1Fixed prosthodontics, faculty of dentistry, ainshams university | ||||
| 2Fixed Prosthodontic department Ain Shams University | ||||
| Abstract | ||||
| Objective: This study was conducted to examine the effect of various post-sintering interventions on the surface characteristics and hardness of translucent zirconia. Materials and methods: Thirty-eight zirconia discs were cut from InCoris-TZI blocks. Discs were sintered, cleaned, and divided into four groups according to post-sintering intervention (n=8 in each): Group P: Polished only, Group PG: Polished and Glazed, Group PHT: Polished and Heat treated for one glaze firing cycle, and Group PGHT: Polished, Glazed and Heat treated as the previous group. Each treatment was carried out according to the manufacturer's guidelines. One disc from each group was examined using a Scanning Electron microscope to explore the surface morphology. Surface roughness was assessed using an optical noncontact method. Micro-hardness of the specimens was evaluated using a Vickers diamond indenter. All data were calculated, and statistical analysis was performed. Results: There was a significant difference between groups in surface roughness. The PHT samples had the greatest value (0.26±0.01) and the PG samples had the lowest one (0.23±0.03) while there was no significant difference between groups for microhardness. Conclusions: Glazing following polishing Translucent zirconia exhibited the best surface smoothness. All post-sintering interventions had no effect on translucent zirconia surface hardness. | ||||
| Keywords | ||||
| Glazing; polishing; firing; microhardness | ||||
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