Effect of Simultaneous Sintering of Bioglass to a Zirconia Core on Properties and Bond Strength

Abstract

This study aimed to assess bioglass sintering to a zirconia core on surface properties and bonding strength to resin cement. Zirconia specimens were divided into four groups: G I: sintered; G II: bioglass modified zirconia (a bioglass slurry was sintered with zirconia at 1550 °C); G III: sandblasted using 50 μm Al2O3 particles; and G IV: Z-prime plus application. Surface morphology and chemical analysis were studied using a scanning electron microscope and energy-dispersive spectroscopy. Surface roughness was evaluated using a profilometer. Surface hardness was measured using an indentation tester. For the microshear bond strength test, resin cement cylinders were bonded to a zirconia surface. Half of the specimens were tested after 24 h; the other half were thermocycled (5–55 °C) for 1000 cycles. A shearing load was applied at a crosshead speed of 0.5 mm/min on a universal testing machine. Data were analyzed with ANOVA using SPSS software at (p < 0.05). Results: tThe mean surface roughness of G II was significantly higher than G I and G III. The microhardness of G II was significantly lower than all groups. For bond strength, there was no significant difference between groups II, III, and IV after thermocycling. Conclusions: Bioactive glass can increase the bond strength of zirconia to resin cement, and is comparable to sandblasting and Z-prime bonding agents.

Development, characterization, and biological study of bioglass coatings 45S5 and BioK on zirconia implant surfaces

“…7,[33][34][35] Previous studies have shown that the zirconia surface promotes increased osseointegration rates and reduced adhesion of pathogenic microorganisms. 33,[36][37][38] To enhance these properties, bioactive glass layers have been added to the zirconia surface to improve bond strength and biological response. [39][40][41] Bioglass 45S5, known as bioglass, is a biomaterial developed by Larry Hench in 1969, to promote a fast and durable chemical bond with bone tissue.…”

“…Zirconia is an example of ceramic material 4,5,32 widely used in dentistry and orthopedics due to its excellent chemical stability, high strength, fracture toughness, and aesthetic properties 7,33–35 . Previous studies have shown that the zirconia surface promotes increased osseointegration rates and reduced adhesion of pathogenic microorganisms 33,36–38 . To enhance these properties, bioactive glass layers have been added to the zirconia surface to improve bond strength and biological response 39–41 …”

Glass and Glass-Ceramic Porous Materials for Biomedical Applications

“…The formation of crystalline phases is influenced by particle size and the CaO/SiO2 ratio (Dávalos et al, 2020). Glass-crystalline materials based on bioglasses belong to bioactivity class A, showing high biological reactivity and have very good mechanical properties, exceeding the parent glass in terms of hardness, bending strength and crack resistance (El-Wassefy et al, 2021). When the glass-ceramic material is immersed in the SBF solution, three processes occur successively: leaching (a), dissolution (b) and precipitation (c) -Fig.…”

The Effect of Bioglass Coating on Microshear Bond Strength of Resin Cement to Zirconia

“…This layer serves as a chemically reactive surface that can be etched and primed [ 9 , 10 ]. Different types of ceramic coatings have been used for this purpose [ 8 , 11 - 13 ], however, due to the lack of studies in this regard, further investigation of ceramic coatings on the inner surface of zirconia is encouraged [ 8 ]. In some studies, bioglass coatings on zirconia implants have been successfully used to benefit from the bioactive properties of bioglass and the mechanical properties of zirconia [ 14 , 15 ].…”