Microshear Bond Strength of High-viscosity Glass-ionomer to Normal and Caries-affected Dentin Under Simulated Intrapulpal Pressure

2018 ◽  
Vol 43 (6) ◽  
pp. 665-673 ◽  
Author(s):  
HA El-Deeb ◽  
EH Mobarak
Keyword(s):  
Bond Strength ◽  
Repeated Measures ◽  
Failure Modes ◽  
Testing Machine ◽  
High Viscosity ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Restorative Treatment ◽  
Dye Permeability ◽  
Microshear Bond Strength

SUMMARY Objectives: The use of high-viscosity glass-ionomer cements (HVGICs) for atraumatic restorative treatment (ART) restorations is widely practiced with the advent of various HVGICs. However, the bonding of the latter to caries-affected dentin (CAD) should be validated, especially because it is the common substrate left after conservative caries removal following the ART approach. Hence, this study was carried out to evaluate the microshear bond strength (μSBS) of three HVGICs to normal dentin (ND) and CAD under intrapulpal pressure (IPP) simulation. Methods and Materials: The occlusal enamel of 90 molars with mid-coronal caries was cut to expose flat dentin surfaces containing both ND and CAD. Dentin substrates (ND and CAD) were differentiated using visual, tactile, caries-detecting dye, and dye-permeability methods. Prepared crown segments were equally divided (n=30) according to the tested HVGICs into GC Fuji IX GP Fast, Fuji IX GP containing chlorhexidine, and zinc-reinforced ChemFil Rock HVGIC. Microcylinders of tested HVGICs were built up on both dentin substrates (n=30 for each tested HVGIC per each substrate) using starch tubes while the specimens were subjected to simulated IPP of 15 mm Hg. The μSBS test was conducted using a universal testing machine, and failure modes were determined using a scanning electron microscope. Data were statistically analyzed using two-way analysis of variance (ANOVA) with repeated measures, one-way ANOVA, and Bonferroni post hoc tests (α=0.05). Results: For both dentin substrates (ND and CAD), the μSBS values of ChemFil Rock were significantly higher than those recorded for the other HVGICs. The μSBS values of each tested HVGIC to ND and CAD were not statistically different. Failure modes were mainly mixed. Conclusions: Zinc-reinforced HVGIC ChemFil Rock showed superior bonding to ND and CAD compared to the GC Fuji IX GP Fast and Fuji IX with chlorhexidine. However, each of the tested HVGICs showed comparable bonding to both dentin substrates (ND and CAD).

scholarly journals Compressive and diametral tensile strength of glass ionomer cements

2004 ◽  
Vol 12 (4) ◽  
pp. 344-348 ◽  
Author(s):  
Eduardo Bresciani ◽  
Terezinha de Jesus Esteves Barata ◽  
Ticiane Cestari Fagundes ◽  
Akimi Adachi ◽  
Marina Martins Terrin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Mean Value ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Restorative Treatment ◽  
Significant Difference ◽  
The Mean ◽  
Diametral Tensile Strength

The aim of this study was to compare, in different periods of time, the compressive and diametral tensile strength of a traditional high viscous glass ionomer cement: Fuji IX (GC Corporation), with two new Brazilian GIC's: Vitro-Molar (DFL) and Bioglass R (Biodinamica), all indicated for the Atraumatic Restorative Treatment (ART) technique. Fifteen disk specimens (6.0mm diameter x 3.0mm height) for the diametral tensile strength (DTS) test and fifteen cylindrical specimens (6.0mm diameter x 12.0mm height) for the compressive strength (CS) test were made of each GIC. Specimens were stored in deionized water at 37º C and 100% of humidity in a stove until testing. Five specimens of each GIC were submitted to CS and DTS test in each period, namely 1 hour, 24 hours and 7 days. The specimens were tested in a testing machine (Emic) at a crosshead speed of 1.0mm/min for CS and 0.5mm/min for the DTS test until failure occurred. The data were submitted to two-way ANOVA and Tukey tests (alpha=0.05). The mean CS values ranged from 42.03 to 155.47MPa and means DTS from 5.54 to 13.72 MPa, with test periods from 1h to 7 days. The CS and DTS tests showed no statistically significant difference between Fuji IX and Vitro Molar, except for CS test at 1-hour period. Bioglass R had lowest mean value for CS of the cements tested. In DTS test Bioglass R presented no statistically significant differences when compared with all others tested GICs at 1-hour period and Bioglass R presented no difference at 24-hour and 7-day periods when compared to Vitro-Molar. Further studies to investigate other physical properties such as fracture toughness and wear resistance, as well as chemical composition and biocompatibility, are now needed to better understand the properties of these new Brazilian GIC's.

scholarly journals Atraumatic Restorative Treatment and Interim Therapeutic Restoration: A Review of the Literature

2019 ◽  
Vol 7 (1) ◽  
pp. 28 ◽  
Author(s):  
Afnan Saber ◽  
Azza El-Housseiny ◽  
Najlaa Alamoudi
Keyword(s):  
Dental Treatment ◽  
High Viscosity ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Success Rates ◽  
Traditional Treatment ◽  
Restorative Treatment ◽  
Mechanical Approach ◽  
Better Than ◽  
The Ideal

This review discusses the techniques and uses of atraumatic restorative treatment (ART) and interim therapeutic restoration (ITR) and states the differences between these two approaches. ART and ITR are similar approaches and are performed using the same material, but they differ in the purpose of their use. ART is used in cases when there are obstacles to reaching dental care units and has been proven to have high success rates in primary and permanent dentitions. ITR is used as a temporary restoration that will be replaced with a more definitive one. ITR is used in cases when the ideal dental treatment cannot be performed. Conventional glass polyalkenoate (ionomer) restorative cement (GIC) is the material of choice that has been used for ART and ITR. This is because of its fluoride release properties, including its ability to bond to enamel and dentine, its pulpal biocompatibility, and its ease of manipulation. High-viscosity glass ionomer performed better than low and medium-viscosity glass ionomer in ART. Combining GIC with conditioner, as well as the use of a chemo-mechanical approach, improved the success rate of ART. Both ATR and ITR are acceptable strategies, with success rates comparable to the traditional treatment methods.

scholarly journals Bond Durability of Self-etch Adhesive to Ethanol-Based Chlorhexidine Pretreated Dentin after Storage in Artificial Saliva and under Intrapulpal Pressure Simulation

2013 ◽  
Vol 38 (4) ◽  
pp. 439-446 ◽  
Author(s):  
AA Ali ◽  
HA El Deeb ◽  
O Badran ◽  
EH Mobarak
Keyword(s):  
Bond Strength ◽  
Repeated Measures ◽  
Failure Modes ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Single Step ◽  
Control Group ◽  
Bond Stability ◽  
Self Etch

SUMMARY Objective To evaluate the bond strength durability of a single-step self-etch adhesive to dentin pretreated with either ethanol-based chlorhexidine (ECHX) or water-based chlorhexidine (WCHX) after storage in artificial saliva and under intrapulpal pressure simulation (IPPS). Methods The occlusal enamel of 30 freshly extracted premolars was trimmed to expose midcoronal dentin. Roots were sectioned to expose the pulp chamber. Specimens were distributed over three groups (n=10) according to the dentin pretreatment used. In the first group, Adper Easy One (3M ESPE) was applied to the dentin surfaces according to the manufacturer's instructions (control group). In the second group, dentin was pretreated before bonding with 1 mL of 2% CHX diacetate dissolved in 100% ethanol (ECHX). The third group received the same pretreatment; however, CHX was dissolved in distilled water (WCHX). Pretreatment and bonding were carried out while the specimens were subjected to IPPS. Resin composite (Valux Plus, 3MESPE) buildups were made. After curing, specimens were stored in artificial saliva and under IPPS at 37°C in a specially constructed incubator (n=5/group) either for 24 hours or six months prior to testing. Thereafter, bonded specimens were sectioned into sticks with a cross section of 0.9 ± 0.01 mm2 and subjected to microtensile bond strength (μTBS) testing (n=25/subgroup) using a universal testing machine. Data were statistically analyzed using two-way analysis of variance (ANOVA) with repeated measures, one-way ANOVA , and Bonferroni post hoc tests (p≤0.05). Failure modes were determined using a scanning electron microscope. Results After 24 hours of storage, control and WCHX groups revealed significantly higher μTBS than the ECHX group. After six-month storage in artificial saliva and IPPS, only the WCHX group maintained its μTBS value. The predominant mode of failure was the mixed type, except for the ECHX group, which was mostly adhesive. Conclusion Pretreatment of the dentin with ECHX had a negative effect on bonding of the tested single-step self-etch adhesive; however, WCHX showed bond stability under IPPS.

scholarly journals Mechanical Properties of High-Viscosity Glass Ionomer Cement and Nanoparticle Glass Carbomer

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Isabel Cristina Olegário ◽  
Anna Paula Vieira Ferreira Prado Malagrana ◽  
Sabrina Sun Ha Kim ◽  
Daniela Hesse ◽  
Tamara Kerber Tedesco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Glass Ionomer Cement ◽  
High Viscosity ◽  
Knoop Hardness ◽  
Glass Ionomer ◽  
Bonding Performance ◽  
Microshear Bond Strength ◽  
Ionomer Cement

Introduction. The lack of evidence regarding the best available material for restoring occlusal-proximal cavities in primary teeth leads to the development of new restorative material, with nanoparticles, in order to enhance mechanical properties, resulting in increased restoration longevity.Aim.To evaluate the Knoop hardness and bond strength of nanoparticles material glass carbomer cement (CAR) and high-viscosity glass ionomer cement (GIC) in sound and caries-affected dentin.Methods.Forty bovine incisors were selected and assigned into four groups (n=10): SGIC, sound dentin and GIC; SCAR, sound dentin and CAR; CGIC, caries-affected dentin and GIC; and CCAR, caries-affected dentin and CAR. All groups were submitted to microshear bond strength (MPa). Knoop hardness was also performed. Bond strength values were subjected to two-way ANOVA and Tukey test. Knoop hardness data were subjected to one-way ANOVA.Results.GIC presented higher Knoop hardness (P<0.001) and bond strength (P=0.027) than CAR. Also, both materials showed better performance in sound than in caries-affected substrates (P=0.001). The interaction between factors was not statistically different (P=0.494).Conclusion.Despite nanoparticles, CAR shows inferior performance as compared to GIC for the two properties testedin vitro. Moreover, sound dentin results in better bonding performance of both restorative materials evaluated.

scholarly journals The Effect of 3% Phosphate Ascorbyl Gel on Bond Strength of Composite Resin to Enamel treated with 35% Hydrogen Peroxide

2015 ◽  
Vol 16 (5) ◽  
pp. 376-382 ◽  
Author(s):  
Monica Barros da Silva ◽  
Milena de Fátima Schalcher de Castro ◽  
Alice Carvalho Silva ◽  
Marcela Mayana Pereira Franco ◽  
Ana Paula Brito Silva ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Failure Modes ◽  
Composite Resin ◽  
Testing Machine ◽  
Strength Test ◽  
Tukey Test ◽  
Universal Testing ◽  
Microshear Bond Strength ◽  
Bovine Enamel

ABSTRACT Objective To evaluate the effect of 3% phosphate ascorbyl gel (PA) in different times onto the microshear bond strength of composite resin (CR) to bovine enamel treated with 35% hydrogen peroxide (HP). Materials and methods Thirty enamel blocks of bovine incisors were made and divided into 5 groups (n = 6) with three specimens per group (n = 18), according to treatment: G1= No bleaching + CR; G2 = HP + CR after 15d; G3 = HP + CR after 24 hours; G4 = HP + PA (15 min) + CR after 24 hours; G5 = HP + PA (2 hours) + CR after 24 hours. The resin cylinders were made by Tygon matrices. Microshear bond strength test was performed using universal testing machine with a 50N load at a speed of 0.5 mm/min. Fracture modes were assessed by a stereomicroscope 40 ×. Microshear bond strength values were submitted to the analysis of variance (ANOVA) one-way and Tukey test (p < 0.05). Results G1 had significant results when compared to G3 and G5 (p < 0.01). However, G2, G3, G4 and G5 have showed no significant differences among groups (p > 0.05). Failure modes were categorized into adhesive (90%) and mixed (10%). Conclusion The use of 3% phosphate ascorbyl gel for 15 minutes was able to improve bond strength of composite resin to bleached bovine enamel, but when 3% phosphate ascorbyl gel was applied during 40 minutes it negatively interfered in the adhesion of the resin to bleached bovine enamel. How to cite this article de Castro MFS, Silva AC, Franco MMP, Silva APB, Bramante FS, da Silva MB, Lima DM, Pereira AFV. The Effect of 3% Phosphate Ascorbyl Gel on Bond Strength of Composite Resin to Enamel treated with 35% Hydrogen Peroxide. J Contemp Dent Pract 2015;16(5):376-382.

scholarly journals Influence of etching time and bonding strategies on the microshear bond strength of self- and light-cured pit-and-fissure sealants

2012 ◽  
Vol 23 (5) ◽  
pp. 477-483 ◽  
Author(s):  
Eduardo José Souza-Junior ◽  
Boniek Castillo Dutra Borges ◽  
Marcos Antônio Japiassú Resende Montes ◽  
Roberta Caroline Bruschi Alonso ◽  
Glaucia Maria Bovi Ambrosano ◽  
...  
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Testing Machine ◽  
Etching Time ◽  
Fissure Sealants ◽  
Pit And Fissure Sealants ◽  
Flowable Composite ◽  
Significant Difference ◽  
Microshear Bond Strength ◽  
The Impact

This study evaluated the impact of extended etching and bonding strategies on the microshear bond strength of three sealant materials. Two pit-and-fissure sealants [FluroShield, Dentsply (light-cured) and AlphaSeal, DFL (self-cured)] and one light-cured flowable composite resin (Permaflo, Ultradent) were evaluated according to different enamel etching times (15 s or 30 s) and bonding procedures (no adhesive application, application of primer/hydrophobic resin or hydrophobic resin only). Intact enamel blocks were obtained from bovine teeth and sealed via the tested protocols. After 24 h, the microshear bond strength test was performed in a universal testing machine at a crosshead speed of 0.5 mm/min. Failure modes were classified by stereomicroscopy. Data were submitted to a three-way ANOVA and to Tukey's test (α=0.05). There was no statistically significant difference (p>0.05) among the materials. Permaflo showed higher bond strength when etched for 30 s alone. Enamel overetching decreased the bond strength of the light-cured sealant. Primer/bond previous treatment improved bond performance for AlphaSeal. In conclusion, from the tested conditions, all sealant materials presented similar bond strength values in relation to bonding protocol and etching time. The flowable composite can be used as a pit-and-fissure sealant. The use of a three-step adhesive system was essential for the self-cured sealant application.

scholarly journals Bond strength of resin composite to enamel submitted to at-home desensitizer and bleaching agents

2021 ◽  
Vol 20 ◽  
pp. e213859
Author(s):  
Matheus Kury ◽  
Bruna Guerra Silva ◽  
Francine de Almeida Zandonadi ◽  
Leonardo Gonçalves da Cunha ◽  
Vanessa Cavalli
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Resin Composite ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Cohesive Failure ◽  
Machine Failure ◽  
Days Of Therapy ◽  
Microshear Bond Strength ◽  
At Home

Aim: This study evaluated the effect of a desensitizer agent (DES) during bleaching with 10% carbamide peroxide (CP) on enamel microshear bond strength (μSBS). Methods: Sixty bovine incisors were obtained and randomly distributed into groups (n=15): (C) Control: no desensitizing or bleaching, (DES) desensitizing gel application, (CP) bleaching with 10% CP and (CP/DES) bleaching with 10% CP combined with DES. Bleaching was performed for 6 h/day for 14 consecutive days. DES was applied for 8 h only on the 7th and 14th days of therapy. Specimens were stored in artificial saliva among the CP or DES applications and submitted to μSBS testing at three postrestoration times (n=5): 24 h, 7 days, and 14 days after bleaching using a universal testing machine. Failure modes were observed under a stereomicroscope. Data were analyzed by two-way ANOVA and Tukey’s test (α=5%). Results: Immediately after bleaching (24 h), CP promoted lower μSBS than the C and DES groups (p<0.05) but with no differences from the CP/DES. μSBS increased in the DES, CP, and CP/DES groups (p<0.05) when bonding was performed for 7 or 14 days elapsed from bleaching. CP/DES exhibited the highest μSBS among the groups 14 days after bleaching (p<0.05). Cohesive failure in enamel was predominant in the CP groups, while adhesive failure was mostly observed for the other groups. Conclusion: The use of a desensitizer during at-home bleaching maintained the enamel immediate bond strength, and its application favored bonding when the restoration was delayed for 14 days.

Repair Bond Strength of High-viscosity Glass-ionomer Cements Using Resin Composite Bonded with Light- and Self-cured Adhesive Systems

2021 ◽  
Vol 46 (1) ◽  
pp. 45-53
Author(s):  
HA El-Deeb ◽  
EH Mobarak
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Adhesive System ◽  
High Viscosity ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Adhesive Systems ◽  
One Step ◽  
Self Etch

Clinical Relevance High-viscosity glass-ionomer cements (HVGICs) used with atraumatic restorative treatment can be repaired with light- or self-cured adhesive systems; however, the repair bond strength of two-step, self-etching and one-step adhesives in the light-cure mode surpass one-step self-cure adhesives. Working on a feasible self-cure approach in the absence of such in rural areas as well as in war zones is of prime importance. SUMMARY Objectives: Despite the success rate of high-viscosity glass-ionomer cements (HVGICs) used in atraumatic restorative treatment (ART) restorations, partial or bulk fracture of the proximal portion has been recorded to be one of the main causes of proximal restoration failures. Repair of these restorative materials requires a practical solution, especially in cases where there is a lack of electricity. Thus, the purpose of this study was to evaluate the repair microshear bond strength (μSBS) of three HVGICs using a resin composite in association with adhesive systems having different curing modes (ie, light- vs self-curing mode). Methods and Materials: A total of 105 discs (12 mm in diameter and 2 mm thick) of three HVGICs: GC Fuji IX GP Fast (GC Corporation, Tokyo, Japan); Fuji IX GP glass-ionomer cement containing chlorhexidine (GC Corporation, Tokyo, Japan); and ChemFil Rock zinc-reinforced HVGIC (Dentsply De-Trey GmbH, Konstanz, Germany) were prepared. Each specimen was divided into three horizontal sections, according to the tested adhesive system or curing mode: Clearfil SE Bond 2 (two-step, self-etch adhesive); (Kuraray Noritake Dental Inc., Tokyo, Japan) in light-cure mode; Clearfil Universal Bond (one-step, self-etch adhesive); (Kuraray Noritake Dental Inc., Tokyo, Japan) in light-cure mode; or Clearfil Universal Bond (one-step, self-etch adhesive); (Kuraray Noritake Dental Inc., Tokyo, Japan) in self-cure mode, mixing it with Clearfil DC Activator (Kuraray Noritake Dental Inc., Tokyo, Japan). A resin composite microcylinder was bonded to each horizontal section of each specimen using starch tubes. The bonded discs were stored in artificial saliva at 37°C for 24 hours. A μSBS test was conducted using a universal testing machine, while failure modes were determined using scanning electron microscopy. Data were statistically analyzed using two-way analysis of variance (ANOVA), one-way ANOVA, and Bonferroni post hoc tests (α=0.05). Results: Two-way ANOVA revealed a statistically significant effect for the adhesive systems (p&lt;0.01) and not for the HVGICs (p=0.05) nor their interactions (p=0.99). When using Clearfil SE Bond 2 and Clearfil Universal in a light-cure mode, significantly higher μSBS values were found when compared with Clearfil Universal in a self-cure mode. Conclusions: The three tested HVGICs can be successfully repaired using two-step or one-step self-etch adhesive systems. The one-step self-etch adhesive system in light-cure mode is preferred when compared with the self-cure mode.

Survival of ART and Amalgam Restorations in Permanent Teeth of Children after 6.3 Years

2006 ◽  
Vol 85 (7) ◽  
pp. 622-626 ◽  
Author(s):  
J.E. Frencken ◽  
D. Taifour ◽  
M.A. van ’t Hof
Keyword(s):  
Traditional Approach ◽  
High Viscosity ◽  
Permanent Teeth ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Cumulative Survival ◽  
Restorative Treatment ◽  
Parallel Group Design ◽  
Parallel Group ◽  
Amalgam Restorations

The null hypothesis tested was that there is no difference in the survival percentages of all restorations placed through the Atraumatic Restorative Treatment (ART) approach, with high-viscosity glass ionomer, and those produced through the traditional approach, with amalgam (TA), in the permanent dentitions of children after 6.3 years. Using a parallel group design, we randomly assigned a total of 370 children, aged 6 to 9 years, to the ART group and 311 children, also aged 6 to 9 years, to the TA group. Eight dentists placed a total of 1117 single- and multiple-surface restorations. The cumulative survival percentages for ART glass-ionomer restorations were statistically significantly higher than those of amalgam restorations at all time intervals except the first (p ≤ 0.044). After 6.3 years, the cumulative survival percentages of ART and amalgam restorations were 66.1% (SE = 3.1%) and 57.0% (SE = 3.3%), respectively. We concluded that the restorations produced with the ART approach, with high-viscosity glass ionomer, survived longer than those produced with the traditional approach, with amalgam, in the permanent teeth of young children.

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