el-kashlan, A., Hammad, I., El-Fawal, N. (2021). EFFECT OF AIR-BORNE PARTICLE ABRASION/SINTERING SEQUENCE ON THE FLEXURAL STRENGTH OF ZIRCONIA.. Alexandria Dental Journal, 46(Issue 2), 121-126. doi: 10.21608/adjalexu.2020.24145.1048
amr alaa el-din el-kashlan; Ihab Adel Hammad; Naguib El-Fawal. "EFFECT OF AIR-BORNE PARTICLE ABRASION/SINTERING SEQUENCE ON THE FLEXURAL STRENGTH OF ZIRCONIA.". Alexandria Dental Journal, 46, Issue 2, 2021, 121-126. doi: 10.21608/adjalexu.2020.24145.1048
el-kashlan, A., Hammad, I., El-Fawal, N. (2021). 'EFFECT OF AIR-BORNE PARTICLE ABRASION/SINTERING SEQUENCE ON THE FLEXURAL STRENGTH OF ZIRCONIA.', Alexandria Dental Journal, 46(Issue 2), pp. 121-126. doi: 10.21608/adjalexu.2020.24145.1048
el-kashlan, A., Hammad, I., El-Fawal, N. EFFECT OF AIR-BORNE PARTICLE ABRASION/SINTERING SEQUENCE ON THE FLEXURAL STRENGTH OF ZIRCONIA.. Alexandria Dental Journal, 2021; 46(Issue 2): 121-126. doi: 10.21608/adjalexu.2020.24145.1048
EFFECT OF AIR-BORNE PARTICLE ABRASION/SINTERING SEQUENCE ON THE FLEXURAL STRENGTH OF ZIRCONIA.
1Department of Conservative Dentistry,Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
2Conservative Department, Faculty of Dentistry, Alexandria university,Egypt
3Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
Abstract
Introduction: zirconia represents a valuable material that combines both color acceptance and ability to withstand high loads. It had been reported that sintering of zirconia followed by air-borne particle abrasion affect its strength. The effect of air-borne particle abrasion/sintering sequence on shear bond strength of resin cements to zirconia was found non-significant; however the effect of sequence on the flexural strength has not been reported. The Ivoclare Vivadent manufacturer recommendation is to sinter the zirconia before subjecting it to air-borne particle abrasion. Aim of the study: to evaluate the effect of air-borne particle abrasion/sintering sequence on the flexural strength of zirconia. Materials and Method: forty bars of dimensions (26 × 6 × 1.5 millimeter) were fabricated from IPS e-max zircad. The specimens was divided into two equal groups (A and B). Group A (AS) were subjected to air-borne particle abrasion followed by sintering. However specimens of group B (SA) were sintered before air-borne particle abrasion. Specimens of each group were subjected to X-Ray Diffraction to show monoclinic-tetragonal phases percentage. Three-point loading was applied to all specimens to measure the flexural strength using a Universal Testing Machine. Results: At statistically significant level p ≤ 0.05. Group SA has showed significantly higher flexural strength compared to group AS. Air-borne particle abraded surface of group SA showed the highest amount of monoclinic phase crystals after X-Ray Diffraction analysis. Conclusion: Air-borne particle abrasion/sintering sequence affects zirconia’ flexural strength. And air-borne particle abrasion surface treatment induces tetragonal to monoclinic phase transformation in fully sintered zirconia.
View on SCiNiTO
Top