Zeinab N Emam1, Haneen TM Alrimi2, Khaled A ElBanna3 and Ibrahim Mohamed Hamouda4,5*
1Associate Professor, Fixed Prosthodontics Division, Oral and Maxillofacial Surgery and Rehabilitation Department, Faculty of Dental Medicine, Umm Al Qura University, Saudi Arabia and Professor, Fixed Prosthodontics Department, Faculty of Oral and Dental Medicine, Cairo University, Egypt
2Registrar, Fixed Prosthodontics Division, Prosthodontics Department, Al-Noor Specialist Hospital, Makkah, KSA
3Assistant Professor, Fixed Prosthodontics Division, Oral and Maxillofacial Surgery and Rehabilitation Department, Faculty of Dental Medicine, Umm Al Qura University, Saudi Arabia
4Professor of Dental Biomaterials, Department of Restorative Dentistry, Faculty of Dental Medicine, Umm Al Qura University, Makkah , KSA
5Professor of Dental Biomaterials, Department of Dental Biomaterials, Faculty of Dental Medicine, Mansoura University, Mansoura, Egypt
*Corresponding Author: Ibrahim Mohamed Hamouda, Professor of Dental Biomaterials, Department of Restorative Dentistry, Faculty of Dental Medicine Umm Al Qura University, Makkah , KSA and Professor of Dental Biomaterials, Department of Restorative Dentistry, Faculty of Dental Medicine, Mansoura University, Mansoura, Egypt.
Received: November 10, 2022; Published: November 28, 2022
Purpose: The aim of this present study was to examine the effect of various finishing techniques (A: Glazing, B: Re-glazing, C: Polishing) on the fracture resistance and surface roughness of In-Ceram crowns.
Materials and Methods: A total of thirty coping core samples were constructed by using (CAD/CAM system) and divided into two equal groups (15 for each groups), Group A: In-ceram zirconia blocks and Group B: In-ceram Alumina blocks, all samples then veneered by veneering material according to manufacture instructions. Each group was further subdivided according to the type of finishing technique used into three equal subgroups (n = 5): subgroup I (A): Autoglazed samples (control group), subgroup II (G): Re-glazed samples after surface adjustment and subgroup III (P): Polished samples using the recommended polishing kit by the manufacturer. The crowns shaped samples were cemented on epoxy-resin dies and where subject to fracture load testing using universal testing machine. Scanning electron microscopy (SEM) was employed to examine the morphology of the ceramic surface after different finishing techniques. Data were collected and statistically analyzed.
Results: For In-ceram Zirconia crowns the results showed the polishing technique had significant highest mean load at failure than other techniques, while for In ceram Alumina crowns exhibited a significantly higher mean load at failure with the glazing procedures. The results also revealed that In-ceram zirconia crowns had significantly highest mean of surface roughness for re-glazing and glazing techniques, while the polishing technique showed the statistically significant highest mean of surface roughness for In ceram Alumina crowns.
Conclusion: Finishing and polishing of In-ceram zirconia crowns results higher fracture resistance than that produced with the glazing and re-glazing procedures. In-ceram alumina crowns exhibited a significantly higher fracture resistance with the glazing procedures. Glazing and reglazing for In-ceram zirconia crowns results in rougher surfaces when compared with finishing and polishing procedures.
Keywords:In-Ceram Zirconia; In-Ceram Alumina; Fracture Resistance; Surface Roughness; Polishing; Re-glazing and Glazing
Citation: Ibrahim Mohamed Hamouda., et al. “The Influence of Finishing Technique on the Surface Roughness and Fracture Resistance of Different all Ceramic Crowns".Acta Scientific Dental Sciences 6.12 (2022): 140-146.
Copyright: © 2022 Ibrahim Mohamed Hamouda., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.