scholarly journals Effect of Diode Laser Irradiation of Bonding Agents Before Curing Versus Standard Bonding Protocol on the Shear Bond Strength Between Resin Cement and Dentin

2019 ◽  
Vol 22 (3) ◽  
pp. 395-407
Author(s):  
Nada Maged El-Hakim ◽  
Ashraf Mokhtar ◽  
Tamer Hamza
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Diode Laser ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Resin Cement ◽  
Bonding Agent ◽  
Hybrid Layer ◽  
Significant Difference ◽  
Self Etch

Objective: This study aimed to evaluate the effect of diode laser irradiation (970 nm) of a one-step self-etch adhesive (Clearfil S3Bond/CS3B) and of the bonding agent of a two-step self-etch adhesive (Clearfil Liner Bond F/CLBF) placed on dentin before polymerization on the shear bond strength.Material and methods: Forty sound premolars were sectioned buccally to obtain flat dentin surfaces. The specimens were divided into 4 groups (n=10): Group (OS) – CS3B + polymerization. Group (OS-L) – CS3B + laser + polymerization. Group (TS) – CLBF (bonding agent only) + polymerization. Group (TS-L) – CLBF (bonding agent only) + laser + polymerization. The diode laser was irradiated through an 8 mm bleaching tip for 10 seconds, (0.4 W, 10 Hz, 4 J). All samples were cemented to composite blocks submitted to 4000 thermal cycles. The samples were tested for shear bond strength in a universal testing machine. Data obtained was analyzed using Two-way (ANOVA) (P ≤ 0.05) and the Bonferroni post-hoc test. Representative samples from each group were analyzed using scanning electron microscopy (SEM). Results: GroupTS-L– (7.43 MPa) displayed statistically significant higher shear bond strength in comparison to that of group TS – (5.13 MPa). No statistically significant difference was found between group OS-L – (6.49 MPa) and group OS – (7.28 MPa). Group TS-L exhibited the highest resin penetration beyond the hybrid layer under SEM. Conclusions: Diode laser irradiation of a bonding agent placed on dentin without prior priming increased the bond strength to dentin and is promising as a new dentin adhesion protocol.

scholarly journals Effect of Luting Cements On the Bond Strength to Turkom-Cera All-Ceramic Material

2018 ◽  
Vol 6 (3) ◽  
pp. 548-553 ◽  
Author(s):  
Bandar M. A. Al–Makramani ◽  
Abdul A. A. Razak ◽  
Mohamed I. Abu–Hassan ◽  
Fuad A. Al–Sanabani ◽  
Fahad M. Albakri
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Resin Cement ◽  
Glass Ionomer ◽  
Luting Cement ◽  
Significant Difference ◽  
All Ceramic ◽  
Ionomer Cement

BACKGROUND: The selection of the appropriate luting cement is a key factor for achieving a strong bond between prepared teeth and dental restorations.AIM: To evaluate the shear bond strength of Zinc phosphate cement Elite, glass ionomer cement Fuji I, resin-modified glass ionomer cement Fuji Plus and resin luting cement Panavia-F to Turkom-Cera all-ceramic material.MATERIALS AND METHODS: Turkom-Cera was used to form discs 10mm in diameter and 3 mm in thickness (n = 40). The ceramic discs were wet ground, air - particle abraded with 50 - μm aluminium oxide particles and randomly divided into four groups (n = 10). The luting cement was bonded to Turkom-Cera discs as per manufacturer instructions. The shear bond strengths were determined using the universal testing machine at a crosshead speed of 0.5 mm/min. The data were analysed using the tests One Way ANOVA, the nonparametric Kruskal - Wallis test and Mann - Whitney Post hoc test.RESULTS: The shear bond strength of the Elite, Fuji I, Fuji Plus and Panavia F groups were: 0.92 ± 0.42, 2.04 ± 0.78, 4.37 ± 1.18, and 16.42 ± 3.38 MPa, respectively. There was the statistically significant difference between the four luting cement tested (p < 0.05).CONCLUSION: the phosphate-containing resin cement Panavia-F exhibited shear bond strength value significantly higher than all materials tested.

scholarly journals Effect of Dentin Pretreatment with Chlorhexidine on Push-Out Bond Strength of Composite Restorations in Severely Damaged Primary Anterior Teeth

2020 ◽  
Author(s):  
Shabnam Milani ◽  
Bahman Seraj ◽  
Zahra Khoshlafz ◽  
Niusha Abazarian
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Bonding Agent ◽  
Bonding Agents ◽  
Composite Restorations ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Self Etch ◽  
Push Out

Objectives: Achieving durable restorations with adequate strength in severely damaged primary anterior teeth in children is a priority. The aim of this study was to investigate the effect of dentin pretreatment with chlorhexidine on push-out bond strength of composite restorations. Materials and Methods: In this in vitro experimental study, 56 extracted primary anterior teeth were randomly divided into 4 groups: (1) saline and total-etch bonding agent, (2) chlorhexidine and total-etch bonding agent, (3) saline and self-etch bonding agent, and (4) chlorhexidine and self-etch bonding agent. After the application of bonding agents, the post space was filled with Z250 composite resin. Following thermocycling of the samples, the push-out test was performed using a universal testing machine, and the results were analyzed with two-way ANOVA. Results: The mean push-out bond strength values in groups 1 to 4 were 5.7, 8.39, 5.35, and 7 MPa, respectively. Chlorhexidine groups had significant differences with saline groups in bond strength (P<0.05) but there was no statistically significant difference between the self-etch and total-etch bonding agents in the groups (P>0.05). Conclusion: Both types of bonding agents (self-etch and total-etch) exhibited favorable results in radicular dentin of primary anterior teeth; however, pre-treatment with chlorhexidine increased the push-out bond strength of composite restorations in primary anterior teeth.

scholarly journals Comparison of the Shear bonding Strength of ION-Z GIC to a Resin Composite Using Different Adhesive Systems: RCT Study

2020 ◽  
Author(s):  
Sana Lala ◽  
Thuraya Lazkani
Keyword(s):  
Bond Strength ◽  
Bonding Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Self Etch ◽  
Shear Bonding Strength

Abstract Background:In restorative dentistry we usually use Sandwich Technique for posterior restorations where GIC is placed below and a resin composite is placed over it. The bonding strength between these two materials are low. We are looking for the best adhesive system to put it in between. We think that the self-etching bond will give the best bonding strength between them whereas total etch will give lower bonding strength than self-etching system. Methods:ION-Z GIC was bonded to resin composite by using two different bonding agents. The thirty specimens used were prepared by using acrylic blocks with holes in each hole to retain the ION-Z GIC. The specimens were randomly divided into three groups:Group I: Control group.Group II: Total-etch adhesive was applied and cured over ION-Z GIC.Group III: Self-etch adhesive was applied and cured.The composite resin placed over the ION-Z GIC and cured. The shear bond strength was measured by shearing of the bonded specimens on Universal Testing Machine (Model 114) using speed of 0.1mm / minute. The reading was tabulated and subjected to statistical analysis using ANOVA and Tukey's test.Results:The test showed statistically significant difference between Group III and Group I and between Group III and Group II. Group III had the highest shear bonding strength.Conclusion:Self-etch adhesive agent produces have better shear bond strength to ION-Z than total-etch adhesive and to the group without any bonding agent.

scholarly journals Effect of Dentin Preparation Mode on the Bond Strength Between Human Dentin and Different Resin Cements

2018 ◽  
Vol 29 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Lara Almeida Cyrillo Cerqueira ◽  
Ana Rosa Costa ◽  
Ana Maria Spohr ◽  
Eduardo Miyashita ◽  
Benito André Silveira Miranzi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Resin Cement ◽  
Hybrid Layer ◽  
Resin Cements ◽  
Diamond Bur ◽  
Cross Section Area ◽  
Significant Difference ◽  
Preparation Mode

Abstract The aim was to evaluate the influence of different dentin preparation mode in the smear layer characteristics (SL), hybrid layer (HL), and microtensile bond strength (µTBS) to dentin with two resin cements. The occlusal dentin of 120 third molars was exposed. The teeth were divided into 4 groups (n=30) according to the dentin preparation mode: 1- fine grain diamond bur; 2- coarse grain diamond bur; 3- multi laminate carbide steel bur; and, 4- ultrasonic CV Dentus diamond bur. Each treated dentin group was divided into 2 sub-groups (n=15) according to the resin cement: (1) RelyX U200 and (2) RelyX ARC. Resin composite blocks were cemented on dentin. After storage at 37o C for 24 h, beams with a cross section area of 1.0 mm2 were obtained, and tested in a universal testing machine at a crosshead speed of 0.5 mm/min. Two additional teeth for each sub-group were prepared to analyze the SL and HL on a scanning electron microscopy. According to Kruskal-Wallis test and Dunn tests, there was no significant difference in µTBS among the rotary instruments within each resin cement group. RelyX ARC obtained higher µTBS values compared to RelyX U200 (p<0.05). RelyX ARC formed evident HL, which was not observed for RelyX U200. The dentin mode preparation did not influence the µTBS of the resin cements. The SL was different for all instruments. The cementing agent is more determinant in the hybrid layer formation and bond strength to dentin than the instruments applied on dentin.

scholarly journals Comparison of the Shear bonding Strength of ION-Z GIC to a Resin Composite Using Different Adhesive Systems: RCT Study

2021 ◽  
Author(s):  
Sana Lala ◽  
Thuraya Lazkani
Keyword(s):  
Bond Strength ◽  
Bonding Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Self Etch ◽  
Shear Bonding Strength

Abstract Background:In restorative dentistry we usually use Sandwich Technique for posterior restorations where GIC is placed below and a resin composite is placed over it. The bonding strength between these two materials are low. We are looking for the best adhesive system to put it in between. We think that the self-etching bond will give the best bonding strength between them whereas total etch will give lower bonding strength than self-etching system. Methods:ION-Z GIC was bonded to resin composite by using two different bonding agents. The thirty specimens used were prepared by using acrylic blocks with holes in each hole to retain the ION-Z GIC. The specimens were randomly divided into three groups:Group I: Control group.Group II: Total-etch adhesive was applied and cured over ION-Z GIC.Group III: Self-etch adhesive was applied and cured.The composite resin placed over the ION-Z GIC and cured. The shear bond strength was measured by shearing of the bonded specimens on Universal Testing Machine (Model 114) using speed of 0.1mm / minute. The reading was tabulated and subjected to statistical analysis using ANOVA and Tukey's test.Results:The test showed statistically significant difference between Group III and Group I and between Group III and Group II. Group III had the highest shear bonding strength.Conclusion:Self-etch adhesive agent produces have better shear bond strength to ION-Z than total-etch adhesive and to the group without any bonding agent.

scholarly journals Pengaruh bahan bonding self-etch terhadap kekuatan perlekatan antara pasak glass fiber dengan resin komposit

2012 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Astrid Yudhit ◽  
Rusfian Dayuni Ariski S
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Bonding Agent ◽  
Tensile Shear ◽  
Fiber Post ◽  
Glass Fiber Post ◽  
Self Etch

Nowadays, glass fiber post and composite resin cores have been used in endodontic treatment for esthetics achievement. The success of this treatment was affected by some factors such as bond strength between post and cores. The aim of this study is to investigate the effect of self etch bonding agent that use as adhesive materials between glass fiber post and resin composite by its bond strength. Totally twenty samples is used in this study, and divided in two groups (n=10 for each group), bonding group agents and without bonding agent group (control). The tensile-shear bond strength tested with Universal Testing Machine. Then, the bond strength values were analyzed statistically with t-test (p≤ 0,05). The result shows that bonds strength values in bonding agent groups were higher than without bonding agent groups. But, there is no significantly different between groups. In conclusion, bonding agent did not have effect on tensile-shear bond strength between glass fiber post and resin composite.

scholarly journals Evaluation of Flexural, Diametral Tensile, and Shear Bond Strength of Composite Repairs

2014 ◽  
Vol 39 (6) ◽  
pp. E250-E260 ◽  
Author(s):  
TA Imbery ◽  
T Gray ◽  
F DeLatour ◽  
C Boxx ◽  
AM Best ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Surface Treatments ◽  
Bonding Agent ◽  
Acid Etching ◽  
Significant Difference ◽  
Phosphoric Acid Etching

SUMMARY Objective Repairing composite restorations may be a more conservative treatment than replacing the entire restoration. The objective of this in vitro study was to determine the best repair method by measuring flexural, diametral tensile, and shear bond strength of repaired composites in which the surfaces were treated with chemical primers (Add & Bond or Silane Bond Enhancer), a bonding agent (Optibond Solo Plus [OBSP]), or mechanical retention with a bonding agent. Methods Filtek Supreme Ultra shade B1B was placed in special molds to fabricate specimens that served to test the flexural, diametral tensile, or shear strength of the inherent resin substrate. The same molds were modified to make specimens for testing repair strength of the resin. Repairs were made immediately or after aging in deionized water at 37°C for seven days. All repair sites were finished with coarse Sof-Lex discs to simulate finishing new restorations or partially removing aged restorations. Repair surfaces were treated with one of the following: 1) phosphoric-acid etching and OBSP; 2) Add & Bond; 3) phosphoric-acid etching, Silane Bond Enhancer, and OBSP; or 4) quarter round bur, phosphoric-acid etching, and OBSP. Specimens were placed back in the original molds to fabricate specimens for diametral tensile or flexural testing or in an Ultradent jig to make specimens for shear bond testing. Composite resin in shade B5B was polymerized against the treated surfaces to make repairs. Two negative control groups for the three testing methods consisted of specimens in which repairs were made immediately or after aging without any surface treatments. Controls and experimental repairs were aged (water 37°C, 24 hours) before flexural, diametral tensile, or shear testing in an Instron Universal testing machine at a crosshead speed of 0.5 mm/min. Results Experimental flexural repair strengths ranged from 26.4% to 88.6% of the inherent substrate strength. Diametral tensile repair strengths ranged from 40% to 80% of the inherent substrate strength, and shear bond strength repairs ranged from 56% to 102%. Geometric means were statistically analyzed with two-way analysis of variance on their log-transformed values. Significant differences were determined using Tukey honestly significant difference (p&lt;0.05). Conclusions Depending on the mechanical property being tested, surface treatments produced different results. OBSP produced more consistent results than chemical primers.

scholarly journals Effect of Cyclic Loading on Shear Bond Strength of Orthodontic Brackets: An In Vitro Study

2019 ◽  
Author(s):  
Mohammad Moslem Imani ◽  
Farzaneh Aghajani ◽  
Nafiseh Momeni ◽  
Mohammad Sadegh Ahmad Akhoundi
Keyword(s):  
Cyclic Loading ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Bonding System ◽  
Significant Difference ◽  
Bonding Systems ◽  
Self Etch

Objectives: In clinical conditions, orthodontic brackets are exposed to periodic stresses mainly induced by mastication and intraoral forces. The objective of the present study was to evaluate the effects of cyclic loading to simulate masticatory forces on shear bond strength (SBS) of metal brackets bonded to teeth using self-etch and total-etch bonding systems. Materials and Methods: Eighty-four caries- and crack-free bovine mandibular incisors were selected and randomly assigned to two groups based on the type of bonding system. After bonding, all samples were thermocycled (500 cycles) followed by cyclic loading of the half of the specimens in each group by applying 40 N load with 2 Hz frequency for 10,000 cycles. The SBS was measured using a universal testing machine. The adhesive remnant index (ARI) score was calculated subsequently. Data were analyzed using Kolmogorov-Smirnov test, two-way ANOVA and Mann-Whitney test. Results: The SBS was 10.09±3.78 MPa and 14.44±6.06 MPa for self-etch and total-etch bonding systems in cyclic loading group, respectively. The SBS was 9.43±5.3 MPa and 11.31±5.42 MPa in self-etch and total-etch groups without cyclic loading, respectively. Cyclic loading did not cause any significant difference in SBS (P>0.05). The ARI scores of the groups were significantly different (P<0.05). Conclusions: The present results demonstrated that low masticatory forces at 10,000 cycles did not have a significant impact on bracket-adhesive SBS; however, they significantly changed the ARI score. Even though the total-etch bonding system yielded higher SBS than the self-etch system, the performance of both was clinically acceptable.

scholarly journals Bonding performance of self-etch adhesives to enamel bleached with different peroxide concentrations

2021 ◽  
Vol 32 (5) ◽  
pp. 96-104
Author(s):  
Ma’an M Nayif ◽  
Masayuki Otsuki ◽  
Junji Tagami
Keyword(s):  
Bond Strength ◽  
Significant Interaction ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Adhesive Systems ◽  
Bonding Performance ◽  
Universal Testing ◽  
Significant Difference ◽  
Level Of Significance ◽  
Self Etch

Abstract The aim of this study was to evaluate the micro-shear bond strength (µSBS) of one and two steps self-etch adhesive systems after enamel bleaching with photo-activated bleaching systems of different hydrogen peroxide (HP) concentration. Occlusal enamel of forty intact human molars were flattened and assigned into four groups. GI Unbleached, GII, GIII, and GIV were bleached with Pyrenees (3.5% HP), GC TiON (20% HP), and Hi-Lite (35% HP) respectively. Enamel treatment with one and two steps self-etch adhesives (Clearfil S3 Bond- S3, and Clearfil SE Bond-SE) then micro-tubes were fixed on enamel and filled with AP-X composite (n=5). Bond was tested with the universal testing machine. Data were analyzed using two-way ANOVA and Tukey’s tests at 5 % level of significance. The µSBS was significantly different between adhesives (F=154.46; p<0.05) and bleaching systems (F=77.33; p<0.05) with significant interaction. Specimens bonded with S3 shows a significantly lower μSBS than those bonded with SE (p<0.05) in all groups. For both adhesives the bleached groups demonstrate lower µSBS than unbleached except specimens bleached with Pyrenees and bonded with SE (p>0.05). A significant difference was observed between groups of the bleaching systems (p<0.05). Different peroxide concentrations photo-activated bleaching systems adversely affect μSBS of one and two steps self-etch adhesives. Low concentration system (Pyrenees) does not influence the bond strength of two steps adhesive.

scholarly journals The Effect of Remineralizing Agents With/Without CO2 Laser Irradiation on Structural and Mechanical Properties of Enamel and its Shear Bond Strength to Orthodontic Brackets

2020 ◽  
Vol 11 (2) ◽  
pp. 144-152
Author(s):  
Hannaneh Ghadirian ◽  
Allahyar Geramy ◽  
Waleed Shallal ◽  
Soolmaz Heidari ◽  
Nooshin Noshiri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Laser Irradiation ◽  
Co2 Laser ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Beam Diameter ◽  
Demineralized Enamel ◽  
Significant Difference

Introduction: Remineralizing agents may be used for the treatment of white spot lesions (WSLs) prior to bracket bonding. However, some concerns exist regarding their possible interference with the etching and bonding process, negatively affecting the bond strength. This study aimed to assess the effect of two remineralizing agents with/without CO2 laser irradiation on the mechanical properties and shear bond strength (SBS) of demineralized enamel to the orthodontic bracket. Methods: This study evaluated 60 premolar teeth in 6 groups (n=10) as follows: (I) sound enamel, (II) demineralized enamel, (III) Nupro remineralizing agent (N), (IV) Nupro and CO2 laser (N/L), (V) Teethmate remineralizing agent (T), and (VI) Teethmate and CO2 laser (T/L). The remineralizing agents were applied to the enamel surfaces after their immersion in a demineralizing solution for 5 days. In groups IV and VI, the CO2 laser with a 10.6 μm wavelength, 10 ms pulse duration, a 50 Hz repetition rate, 0.3 mm beam diameter and 0.7 W power was irradiated after applying the remineralizing agents. Brackets were bonded to the enamel surfaces and SBS was measured by a universal testing machine. For the assessment of enamel microhardness, 20 sections of molar teeth were divided into 4 groups (n=5; N, N/L, T, T/L) and their microhardness was measured before demineralization, after demineralization and after remineralization. X-ray diffraction (XRD) analysis, field-emission scanning electron microscopy (FESEM) and energy-dispersive spectrometry (EDS) were carried out to assess the formation of hydroxyapatite. The atomic percentages of the C, O, P, Ca, Na, Si, F and Ca/P ratio were determined by EDS analysis. Results: The SBS significantly decreased in group II (P<0.001). There was no significant difference among the groups I, III, IV, V and VI (P<0.05). This finding was similar to the microhardness results, which showed an increase in microhardness after remineralization (P<0.05), with no difference among the remineralizing agents. The Ca/P ratio was the highest in the Nupro group and the lowest in the demineralized group. Conclusion: Remineralizing agents can significantly improve the microhardness and structural properties of demineralized enamel to a level similar to that of sound enamel with no adverse effect on SBS to orthodontic brackets.

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