Effect of silica coating and laser treatment on the flexural strength, surface characteristics, and bond strength of a dental zirconia

2021 ◽  
Vol 129 (1) ◽  
Author(s):  
Beatriz Togoro Ferreira Silva ◽  
Livia Tosi Trevelin ◽  
Ananda Carolina Schroeter ◽  
Amanda Endres Willers ◽  
Paulo Francisco Cesar ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Bond Strength ◽  
Laser Treatment ◽  
Surface Characteristics ◽  
Silica Coating ◽  
Strength Surface

scholarly journals Do Chemical-Based Bonding Techniques Affect the Bond Strength Stability to Cubic Zirconia?

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3920
Author(s):  
Allegra Comba ◽  
Andrea Baldi ◽  
Riccardo Michelotto Tempesta ◽  
Massimo Carossa ◽  
Letizia Perrone ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Artificial Aging ◽  
Silica Coating ◽  
Strength Test ◽  
Zirconia Sample ◽  
Luting Cement ◽  
Bonferroni Test ◽  
Bonding Systems ◽  
Composite Cylinders

This study evaluated the effectiveness of chemical-based adhesive techniques on promoting immediate and aged bond strength between zirconia and luting cement. A total of 128 discs of zirconia were divided into 4 groups (n = 32) according to the adhesive treatment: tribochemical silica-coating followed by silane (Silane Primer, Kerr) and bonding (Optibond FL, Kerr), Signum Zirconia Bond (Hereaus), Z-Prime Plus (Bisco), and All-Bond Universal (Bisco). Composite cylinders were cemented on the zirconia sample with Duo-Link Universal (Bisco). Eight specimens per group were subjected to 10,000 thermocycles and subsequently bond strength was tested with shear-bond strength test. ANOVA test showed that artificial aging significantly affected the bond strength to zirconia. Bonferroni test highlighted a significant influence of adhesive treatment (Signum) on bond strength after thermocycling. It was concluded that 10-MDP-based bonding systems showed no improvement in initial bond strength compared with tribochemical treatment. All chemical bonding techniques tested in this study were influenced by thermocycling.

scholarly journals Properties of Calcium Sulfoaluminate Cement Mortar Modified by Hydroxyethyl Methyl Celluloses with Different Degrees of Substitution

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2136
Author(s):  
Shaokang Zhang ◽  
Ru Wang ◽  
Linglin Xu ◽  
Andreas Hecker ◽  
Horst-Michael Ludwig ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Bond Strength ◽  
Cement Mortar ◽  
Retention Rate ◽  
Methyl Cellulose ◽  
Tensile Bond Strength ◽  
Calcium Sulfoaluminate Cement ◽  
Calcium Sulfoaluminate ◽  
Cement Mortars

This paper studies the influence of hydroxyethyl methyl cellulose (HEMC) on the properties of calcium sulfoaluminate (CSA) cement mortar. In order to explore the applicability of different HEMCs in CSA cement mortars, HEMCs with higher and lower molar substitution (MS)/degree of substitution (DS) and polyacrylamide (PAAm) modification were used. At the same time, two kinds of CSA cements with different contents of ye’elimite were selected. Properties of cement mortar in fresh and hardened states were investigated, including the fluidity, consistency and water-retention rate of fresh mortar and the compressive strength, flexural strength, tensile bond strength and dry shrinkage rate of hardened mortar. The porosity and pore size distribution were also analyzed by mercury intrusion porosimetry (MIP). Results show that HEMCs improve the fresh state properties and tensile bond strength of both types of CSA cement mortars. However, the compressive strength of CSA cement mortars is greatly decreased by the addition of HEMCs, and the flexural strength is decreased slightly. The MIP measurement shows that HEMCs increase the amount of micron-level pores and the porosity. The HEMCs with different MS/DS have different effects on the improvement of tensile bond strength in different CSA cement mortars. PAAm modification can improve the tensile bond strength of HEMC-modified CSA cement mortar.

scholarly journals Properties of Composite Materials Used for Bracket Bonding

2013 ◽  
Vol 24 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Ana Caroline Silva Gama ◽  
Andre Guaraci de Vito Moraes ◽  
Lilyan Cardoso Yamasaki ◽  
Alessandro Dourado Loguercio ◽  
Ceci Nunes Carvalho ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Stress Test ◽  
Flexural Modulus ◽  
Significant Difference ◽  
Contraction Stress ◽  
Materials Used ◽  
Flowable Composites

The purpose of this study was to evaluate in vitro the shear bond strength to enamel, flexural strength, flexural modulus, and contraction stress of one orthodontic composite and two flowable composites. Orthodontic brackets were bonded to 45 human maxillary premolars with the composites Transbond XT, Filtek Z-350 flow and Opallis flow and tested for shear bond strength. For measurement of flexural strength and flexural modulus, specimens were fabricated and tested under flexion. For the contraction stress test, cylindrical specimens were tested and an extensometer determined the height of the specimens. The data were subjected to one-way ANOVA and Tukey's test (α=0.05). The shear bond strength values were significantly lower (p<0.05) for the flowable composites compared with the orthodontic composite. For the flexural strength, no statistically significant difference was found among the composites (p>0.05) while the flexural modulus was significantly higher (p<0.05) for Transbond XT than for Filtek Z-350 flow and Opallis flow. The orthodontic composite presented significantly lower contraction stress values than the flowable composites (p<0.05). The light-activated orthodontic composite material presented higher flexural modulus and shear bond strength and lower contraction stress than both flowable composites.

Influence of Er,Cr:YSGG Laser Treatment on Microtensile Bond Strength of Adhesives to Enamel

2008 ◽  
Vol 33 (4) ◽  
pp. 448-455 ◽  
Author(s):  
M. V. Cardoso ◽  
J. De Munck ◽  
E. Coutinho ◽  
R. B. Ermis ◽  
K. Van Landuyt ◽  
...  
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Laser Treatment ◽  
Clinical Relevance ◽  
Microtensile Bond Strength ◽  
Morphological Alterations

Clinical Relevance Er,Cr:YSGG laser irradiation produced morphological alterations on enamel, which may adversely influence the bond strength of certain adhesives, depending on their approach and composition.

scholarly journals Silane Effect of Universal Adhesive on the Composite–Composite Repair Bond Strength after Different Surface Pretreatments

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 950 ◽  
Author(s):  
Gioia Michelotti ◽  
Maria Niedzwiecki ◽  
Darius Bidjan ◽  
Phoebe Dieckmann ◽  
Shengjile Deari ◽  
...  
Keyword(s):  
Bond Strength ◽  
Silica Coating ◽  
Positive Control ◽  
Positive Control Group ◽  
Control Group ◽  
Universal Adhesive ◽  
Diamond Bur ◽  
Composite Substrates ◽  
The Impact ◽  
Mechanical Surface

This study investigated the impact of a separate silanization step on the repair bond strength of composite substrates using a universal adhesive after various mechanical surface treatments. Composite specimens were aged and exposed to the following mechanical roughening treatments: diamond bur abrasion, aluminum oxide sandblasting, or silica coating. The specimens were then either left untreated or conditioned with universal adhesive (Scotchbond Universal), or a silane coupling agent was applied before the use of the universal adhesive or a conventional adhesive (Optibond FL). The conditioned surfaces and fresh substrate (positive control group) were covered with repair composite, and microtensile bond strength testing was performed. The significantly highest bond strength was obtained in the positive control group. Repair bond strength of the universal adhesive applied after a separate silanization step was similar to that without prior silanization, independent of the mechanical surface treatment. Moreover, after silica coating, no significant differences in the repair bond strength were detected among the different adhesive treatments. In conclusion, a separate silanization step before surface conditioning with the universal adhesive does not enhance the repair bond strength. On silica-coated composite substrates, repair bond strength values of the universal adhesive were similar to those of the conventional adhesive.

Effect of silica coating on the bond strength of milled pure titanium to dental porcelain

2016 ◽  
Vol 124 (5) ◽  
pp. 498-503 ◽  
Author(s):  
Jiantao Ye ◽  
Xiuhua Ye ◽  
Shaohai Chang ◽  
Lang Liu ◽  
Yiping Zhang ◽  
...  
Keyword(s):  
Bond Strength ◽  
Pure Titanium ◽  
Silica Coating ◽  
Dental Porcelain
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