scholarly journals Tensile bond strength of hydroxyethyl methacrylate (HEMA) bonding agent to bovine dentine surface at various humidity

2006 ◽  
Vol 39 (2) ◽  
pp. 59
Author(s):  
Adioro Soetojo
Keyword(s):  
Bond Strength ◽  
Tensile Bond Strength ◽  
Bonding Agent ◽  
Hydroxyethyl Methacrylate ◽  
Dentine Surface

scholarly journals A comparative study of the microtensile bond strength and microstructural differences between sclerotic and Normal dentine after surface pretreatment

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Jinhua Wang ◽  
Weijian Song ◽  
Lei Zhu ◽  
Xin Wei
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Resin Composite ◽  
The Other ◽  
Tensile Bond Strength ◽  
Strength Analysis ◽  
Class Iii ◽  
Surface Pretreatment ◽  
Dentine Surface

Abstract Background The resin bond strength of sclerotic dentine is significantly lower than that of the normal dentine, which paused a challenge for bonding procedures clinically. The aim of this study was to compare the effects of different surface pretreatments on the micro-tensile bond strength and microstructure between sclerotic dentine and normal dentine. Methods Eighty teeth that were collected, forty premolars with typical wedge-shaped defects visually graded as class III were assigned as the sclerotic dentine group (SD), the other forty normal premolars with artificial wedge-shaped defects were assigned as the normal dentine group (ND). Each group was randomly subdivided into eight subgroups according to the solution used: 35% phosphoric acid, 15% EDTA, 5% or 10% NaClO. Then the dentine surface was examined using a scanning electron microscope (SEM). The lesions were restored using self-etching adhesive and the subsequent resin composite. The teeth were sectioned into sticks for the micro-tensile bond strength analysis, and the data were analysed using the SPSS17.0 software package (α = 0.05). Results First, for the ND groups, after pretreatment using 35% phosphoric acid, and 35% phosphoric acid + 5% or 10% sodium hypochlorite, the bonding strengths of the normal dentine were higher than that of the other groups (P < 0.05). Second, for the SD groups, after pretreatment using 35% phosphoric acid, 15% EDTA, and 35% phosphoric acid + 5% or 10% sodium hypochlorite, the bonding strengths of the sclerotic dentine were higher than that of the other groups (P < 0.05). Third, the bond strengths of the sclerotic dentine were lower than that of the normal dentine without any pretreatment (P < 0.05). After pretreatment using 35% phosphoric acid + 5% or 10% sodium hypochlorite, the bonding strengths of the sclerotic dentine were higher than that of the normal dentine (P < 0.05). SEM observation showed that the appearances of dentine surface were changed after pretreatment using the above solutions, with the reduced smear layer, opened small groove and increased dentinal tubules. Conclusion Pretreatment of dentine using 35% phosphoric acid+ 5% or + 10% sodium hypochlorite changed the microstructure of the sclerotic dentine surface and subsequently increased the micro-tensile bond strength.

Comparison of three different preparation methods in the improvement of sealant retention

2004 ◽  
Vol 28 (3) ◽  
pp. 249-252 ◽  
Author(s):  
Laura Camacho Castro ◽  
Ana Claudia Galvão
Keyword(s):  
Bond Strength ◽  
In Vitro Study ◽  
Fracture Load ◽  
Strength Test ◽  
Tensile Bond Strength ◽  
Bonding Agent ◽  
Air Abrasion ◽  
Preparation Methods ◽  
Sealant Retention

The purpose of this in vitro study was to evaluate the effect of three invasive fissure preparation methods in the retention of sealant on the surfaces of permanent molars. One hundred and eight extracted caries-free human molars were used in this study, which were divided into 3 groups according to the fissure preparation: laser, air abrasion and bur. In addition, each of these three groups was further divided into 2 additional groups to isolate those in which a bonding agent would be used from those in which a bonding agent would not be used. After the accomplishment of the different treatments, samples from all the 6 experimental groups were submitted to two different bond strength tests: (i) shear bond strength test and (ii) tensile bond strength test. Bond strengths were determined by the dividing fracture load and a statistical test ANOVA was used to evaluate significant differences. The results showed that laser improved the sealant retention when compared with air abrasion preparation when the bonding agent was used.The use of bonding agent increased the sealant retention in all methods except for tensile bond strength when air abrasion was used as the preparation method.

scholarly journals Influence of disinfectant solutions on the tensile bond strength of a fourth generation dentin bonding agent

2000 ◽  
Vol 14 (2) ◽  
pp. 107-111 ◽  
Author(s):  
Jorge Saldivar BOCANGEL ◽  
Alex O. E. KRAUL ◽  
Absalon G. VARGAS ◽  
Flávio Fernando DEMARCO ◽  
Edmir MATSON
Keyword(s):  
Bond Strength ◽  
Tensile Bond Strength ◽  
Bonding Agent ◽  
Fourth Generation ◽  
Dentin Bonding ◽  
Group 4 ◽  
Dentin Bonding Agent ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

The purpose of the present study was to evaluate the influence of different disinfectant solutions on the tensile bond strength of a fourth generation dentin bonding agent. Forty non carious human molars were selected. Teeth were embedded in acrylic resin and ground until the exposure of a flat superficial dentin surface. Teeth were randomly divided in 4 groups and treated as follows: Group 1 - 2.5% NaOCl for 40 seconds; Group 2 - 2% chlorhexidine for 40 seconds; Group 3 - 1.23% acidulated fluoride for 4 minutes; and Group 4 - control (without disinfectant solution). Following treatments, Scotchbond Multipurpose Plus® (3M) was used according to the manufacturer’s instructions. After that, the test specimens were built with composite resin (Z100®-3M), using a standard Teflon matrix. The specimens were stored in distilled water for 24 hours at a temperature of 37ºC. The tensile strength test was performed using a Mini Instrom testing machine. The mean values obtained for each group, in MPa, were: Group 1 - 7.37 (± 2.51); Group 2 - 11.25 (± 4.65); Group 3 - 9.80 (± 3.11); and Group 4 - 10.96 (± 3.37). The results were submitted to statistical analysis using the ANOVA test, and no statistical significant differences among the groups were found. It can be concluded that the different disinfectant substances used in this research do not adversely affect dentin adhesion.

The effect of enamel moisture on tensile bond strength of composite resin using Single bond in total etch technique

2014 ◽  
Vol 10 (1) ◽  
pp. 59-68
Author(s):  
H Afshar ◽  
M Ghandehari ◽  
S Amiri ◽  
Z Mirzayi ◽  
M Pourali ◽  
...  
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Tensile Bond Strength ◽  
Single Bond

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 Effect of Non-Thermal Atmospheric Plasma on Micro-Tensile Bond Strength at Adhesive/Dentin Interface: A Systematic Review

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1026
Author(s):  
Mohamed M. Awad ◽  
Feras Alhalabi ◽  
Abdullah Alshehri ◽  
Zaid Aljeaidi ◽  
Ali Alrahlah ◽  
...  
Keyword(s):  
Systematic Review ◽  
Bond Strength ◽  
Atmospheric Plasma ◽  
Tensile Bond Strength ◽  
Cochrane Library ◽  
Limited Information ◽  
Short Term ◽  
Etch And Rinse ◽  
Medium Risk

Objective: The objective of this review was to evaluate the effect of non-thermal atmospheric plasma (NTAP) on adhesives resin–dentin micro-tensile bond strength (μTBS) in previously published studies. Methods: Electronic search was conducted using the Medline, Cochrane library, and Scopus databases. The included studies were laboratory studies that investigated the effect of NTAP on adhesives μTBS to coronal dentin. Studies that evaluated the effect of NTAP on bond strength to indirect substrates, enamel or root dentin, were excluded. The methodological quality of included studies was assessed. Results: Thirteen studies were included in this systematic review. All the included studies were considered to have a medium risk of bias. NTAP significantly improved μTBS at 24 h or after short-term aging in five studies (38.5%) and both immediate and after long-term aging in 5 studies (38.5%). In two studies (15.4%), NTAP resulted in a short-term material-dependent effect that was not stable after long-term aging. Interestingly, in one study (7.7%), NTAP had a positive effect only in the etch-and-rinse (ER) mode after long-term aging. Conclusion: Within the limitations of this systematic review, NTAP application could enhance resin–dentin μTBS of ER adhesives or universal adhesives (UAs) applied in the ER mode. In the ER mode, the rewetting step after NTAP seems to be unnecessary. Because of the limited information currently available in the literature, further studies are required to evaluate the effect of the NTAP application on self-etch (SE) adhesives or UAs applied in the SE mode.

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