Influence of Diamond Sono-Abrasion, Air-Abrasion and Er:YAG Laser Irradiation on Bonding of Different Adhesive Systems to Dentin

ABSTRACTObjectives: Different surface treatments may affect bonding performance of adhesive systems to dentin. This study evaluated the influence of different methods of surface treatment on adhesion of bonding agents to dentin.Methods: TDentin surfaces abraded with #600-grit SiC paper were used as control. Three methods of surface treatment (sono-abrasion, air-abrasion and Er:YAG laser irradiation) were used under specific parameters. Four adhesive systems (Tyrian, Clearfil SE Bond, Unifil Bond and Single Bond) were applied to treated surfaces, according to the manufacturers’ instructions. Composite blocks were built on bonded surfaces, then restored teeth were vertically and serially sectioned to obtain bonded slices for interfacial micromorphologic analysis or to produce beam specimens for μ-TBS bond test. Data were analyzed with two-way ANOVA and Tukey test at a significance level of 5%.Results: The results indicated that the preparation of dentin with sono-abrasion or laser did not affect the bond strength, while the preparation of dentin with SiC paper and air-abrasion influenced the bond strength for some systems. A clear difference of the preparation of dentin surfaces and formation of hybrid layer and resin tags were noted.Conclusions: Bonding effectiveness of both the etch-and-rinse and the self-etch adhesives can be influenced by different methods of dentin preparation. (Eur J Dent 2007;1:158-166)

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Influence of CVD Diamond Tips and Er:YAG Laser Irradiation on Bonding of Different Adhesive Systems to Dentin

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1262 ◽

2013 ◽

Vol 14 (1) ◽

pp. 14-20 ◽

Cited By ~ 1

Author(s):

Daphne Câmara Barcellos ◽

Alessandra Buhler Borges ◽

Cesar Rogério Pucci ◽

Carlos Rocha Gomes Torres ◽

Melissa Aline da Silva ◽

...

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Laser Irradiation ◽

High Speed ◽

Er:Yag Laser ◽

Testing Machine ◽

Cvd Diamond ◽

Single Bond ◽

Adhesive Systems ◽

Yag Laser

ABSTRACT Aim The aim of this study was to compare the microtensile bond strength of three adhesive systems, using different methods of dentin preparation. Materials and methods A hundred and eight bovine teeth were used. The dentin from buccal face was exposed and prepared with three different methods, divided in 3 groups: Group 1 (DT)- diamond tip on a high-speed handpiece; Group 2 (CVD)-CVD tip on a ultrasonic handpiece; Group 3 (LA)-Er: YAG laser. The teeth were divided into 3 subgroups, according adhesive systems used: Subgroup 1-Adper Single Bond Plus/3M ESPE (SB) total-etch adhesive; Subgroup 2-Adper Scotchbond SE/3M ESPE (AS) selfetching adhesive; Subgroup 3-Clearfil SE Bond/Kuraray (CS) selfetching adhesive. Blocks of composite (Filtek Z250–3M ESPE) 4 mm high were built up and specimens were stored in deionized water for 24 hours at 37°C. Serial mesiodistal and buccolingual cuts were made and stick-like specimens were obtained, with transversal section of 1.0 mm2. The samples were submitted to microtensile test at 1 mm/min and load of 10 kg in a universal testing machine. Data (MPa) were subjected to ANOVA and Tukey's tests (p < 0.05). Results and conclusion Surface treatment with Diamond or CVD tips associated with Clearfil SE Bond adhesive produced significantly lower bond strength values compared to other groups. Surface treatment with Er: YAG laser associated with Single Bond Plus or Clearfil SE Bond adhesives and surface treatment with CVD tip associated with Adper Scotchbond SE adhesive produced significantly lower bond strength values compared to surface treatment with diamond or CVD tips associated with Single Bond Plus or Adper Scotchbond SE adhesives. Clinical significance Interactions between laser and the CVD tip technologies and the different adhesive systems can produce a satisfactory bonding strength result, so that these associations may be beneficial and enhance the clinical outcomes. How to cite this article Silva MA, Di Nicolo R, Barcellos DC, Batista GR, Pucci CR, Torres CRG, Borges AB. Influence of CVD Diamond Tips and Er:YAG Laser Irradiation on Bonding of Different Adhesive Systems to Dentin. J Contemp Dent Pract 2013;14(1):14-20.

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Co-Blend Application Mode of Bulk Fill Composite Resin

Materials ◽

10.3390/ma12162504 ◽

2019 ◽

Vol 12 (16) ◽

pp. 2504

Author(s):

Mohammad Al-Nabulsi ◽

Alaa Daud ◽

Cynthia Yiu ◽

Hanan Omar ◽

Salvatore Sauro ◽

...

Keyword(s):

Bond Strength ◽

Composite Resin ◽

Degree Of Conversion ◽

Adhesive Systems ◽

Bonding Agents ◽

Force Microscopy ◽

Flowable Composite ◽

Etch And Rinse ◽

Significant Difference ◽

Nanoindentation Hardness

Objective: To evaluate the effect of a new application method of bulk-fill flowable composite resin material on bond-strength, nanoleakage, and mechanical properties of dentine bonding agents. Materials and methods: Sound extracted human molars were randomly divided into: manufacturer’s instructions (MI), manual blend 2 mm (MB2), and manual blend 4 mm (MB4). Occlusal enamel was removed and flattened, dentin surfaces were bonded by Prime & Bond universal (Dentsply and Optibond FL, Kerr). For the MI group, adhesives were applied following the manufacturer’s instructions then light-cured. For MB groups, SDR flow+ bulk-fill flowable composite resin was applied in 2- or 4-mm increment then manually rubbed by a micro brush for 15 s with uncured dentine bonding agents and the mixture was light-cured. Composite buildup was fabricated incrementally using Ceram.X One, Dentsply nanohybrid composite resin restorative material. After 24-h water storage, the teeth were sectioned to obtain beams of about 0.8 mm2 for 24-h and thermocycled micro-tensile bond strength at 0.5 mm/min crosshead speed. Degree of conversion was evaluated with micro-Raman spectroscopy. Contraction gaps at 24 h after polymerization were evaluated and atomic force microscopy (AFM) nano-indentation processes were undertaken for measuring the hardness across the interface. Depth of resin penetration was studied using a scanning electron microscope (SEM). Bond strength data was expressed using two-way ANOVA followed by Tukey’s test. Nanoindentation hardness was separately analyzed using one-way ANOVA. Results: Factors “storage F = 6.3” and “application F = 30.11” significantly affected the bond strength to dentine. For Optibond FL, no significant difference in nanoleakage was found in MI/MB4 groups between baseline and aged specimens; significant difference in nanoleakage score was observed in MB2 groups. Confocal microscopy analysis showed MB2 Optibond FL and Prime & Bond universal specimens diffusing within the dentine. Contraction gap was significantly reduced in MB2 specimens in both adhesive systems. Degree of conversion (DC) of the MB2 specimens were numerically more compared to MS1 in both adhesive systems. Conclusion: Present study suggests that the new co-blend technique might have a positive effect on bond strengths of etch-and-rinse adhesives to dentine.

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Effects of the combination of Er:YAG laser and sandblasting on the shear bond strength between zirconia and resin cement

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v18i0.8656586 ◽

2019 ◽

Vol 18 ◽

pp. e191449

Author(s):

Urias Silva Vasconcelos ◽

Thalisson Saymo de Oliveira Silva ◽

Daylana Pacheco da Silva ◽

Graciela Maria Oliveira Sipaúba ◽

Valdimar da Silva Valente ◽

...

Keyword(s):

Shear Strength ◽

Bond Strength ◽

Aluminum Oxide ◽

Surface Treatment ◽

Laser Irradiation ◽

Er:Yag Laser ◽

Resin Cement ◽

Zirconia Ceramic ◽

Control Group ◽

Luting Cement

Aim: This study was conducted to determine the bond strength between zirconia ceramic and resin luting cement according to the type of surface treatment applied. Methods: Sixty zirconia cylinders measuring 4 x 4 mm were manufactured and distributed into five experimental groups and a control group (n = 10): G1 - sandblasting with 110 μm aluminum oxide; G2 - sandblasting with 30 μm Rocatec Soft®; G3 - Er:YAG laser irradiation at 400 mJ; G4 - Er:YAG laser combined with sandblasting with aluminum oxide; G5 - Er:YAG laser combined with sandblasting with Rocatec Soft®; G6 - no treatment (Control). The zirconia cylinders were bonded in the center of composite resin cylinders (6 mm diameter) using RelyX Ultimate® cement. Shear strength was measured after thermocycling (6000 cycles and 5-55° C). Data were analyzed using one-way ANOVA and Tukey's post-hoc with a 5% significance level. Results: Group 4 had a significantly higher shear strength than all the other groups, except Group 1. Group 3 had a significantly lower shear strength compared with Groups 1 and 4. Conclusion: Sandblasting with 110μm aluminum oxide particles after laser irradiation may be an effective zirconia surface treatment. The use of Er: YAG laser alone is not effective at increasing the bond between resin cement and zirconia.

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Adhesive systems effect over bond strength of resin-infiltrated and de/remineralized enamel

F1000Research ◽

10.12688/f1000research.20523.1 ◽

2019 ◽

Vol 8 ◽

pp. 1743 ◽

Cited By ~ 1

Author(s):

Alessandra Buhler Borges ◽

Amjad Abu Hasna ◽

Amanda Guedes Nogueira Matuda ◽

Stephanie Ribeiro Lopes ◽

Ana Paula Valente Pinho Mafetano ◽

...

Keyword(s):

Bond Strength ◽

Artificial Saliva ◽

Testing Machine ◽

Adhesive System ◽

Adhesive Systems ◽

Bonding Agents ◽

Thermomechanical Cycling ◽

Resin Infiltration ◽

Etch And Rinse ◽

Demineralized Enamel

Background: The purpose of this study was to evaluate the effect of different bonding agents on bond-strength to demineralized enamel after remineralizing treatments and resin infiltration. Methods: Buccal enamel of 120 bovine incisors was polished and then were divided into five experimental groups: SE (sound enamel); DE (demineralized enamel); AS (demineralized enamel immersed in artificial saliva for eight weeks); NaF (demineralized enamel treated with 0.05% sodium fluoride solution (one minute) for eight weeks); Ic (demineralized enamel infiltrated with a low-viscosity resin (Icon-DGM). These groups were subdivided according to adhesive system used: self-etching adhesive Adper Easy One (3M/ESPE) and etch-and-rinse adhesive Single Bond (3M/ESPE). The composite resin blocks were fabricated using a Teflon matrix. A thermomechanical cycling machine was used to carry out the artificial aging of the specimens and thus were sectioned into sticks. The microtensile tests were performed using a universal testing machine at a cross-head speed of 1 mm/min. Data (in MPa) were subjected to two-way ANOVA and Tukey’s tests (5%). Results: Significant differences were found for both factors tested and interactions (p<0.05). Tukey’s test results of µTBS (mean ± SD) were: etch-and-rinse SE (28.79±3.93); DE (30.41±7.22); AS (29.03±3.33); NaF (29.81±4.06)a; Ic (29.47±5.5); and self-etching SE (30.37±6.96); DE (14.62±4.47); AS (9.79±2.32); NaF (9.36±2.31); Ic (30.78±8.68). Conclusions: Resin infiltration did not affect the bond strength of demineralized enamel for both adhesive systems tested. For etch-and-rinse adhesive, no differences were observed for the tested groups. For self-etching adhesive, only the resin-infiltrated group showed similar bond strength to sound enamel. Both etch-and-rinse and self-etching adhesive systems can be used in resin-infiltrated enamel, if a composite restoration needs to be further performed. In enamel that has undergone the de/remineralization process, the use of a total-etch adhesive might be preferable for the restorative procedure.

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Enamel Wetness Effects on Bond Strength Using Different Adhesive Systems

Operative Dentistry ◽

10.2341/10-163-l ◽

2011 ◽

Vol 36 (3) ◽

pp. 274-280 ◽

Cited By ~ 9

Author(s):

AY Furuse ◽

LF Cunha ◽

R Moresca ◽

G Paganeli ◽

RFL Mondelli ◽

...

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

Resin Composite ◽

Adhesive Systems ◽

Bonding Agents ◽

Flat Surfaces ◽

Etch And Rinse ◽

The One ◽

Bonding Systems ◽

One Way Anova

SUMMARY Objective To evaluate, through the application of different dentin bonding systems, the influence of wetness on shear bond strength in enamel. Methods This study evaluated three etch-and-rinse adhesive systems (Scotchbond MP [used with and without primer]; Singlebond; and Prime&Bond 2.1) and two self-etching adhesive systems (Clearfil SE Bond; and Xeno IV). Flat bovine enamel surfaces were either air-dried for 30 seconds or blotted with absorbent paper after acid-etching for the conventional bonding agents or before the application of self-etching bonding agents. The resin composite EsthetX was bonded to flat surfaces that had been treated with one of the adhesives, following the manufacturer's instructions. After being stored in water at 37°C for one week, bonded specimens were broken in shear. Data were evaluated with two-way analysis of variance (ANOVA) and Student-Newman-Keuls tests (α=0.05). For comparing each condition individually, regardless of the adhesive or wetness condition, a one-way ANOVA and a Student-Newman-Keuls test (α=0.05) were applied. Results The two-way ANOVA showed significant differences among adhesive systems. An interaction effect was also observed (p<0.05), but wetness did not influence shear bond strength (p=0.98). The one-way ANOVA showed that the all-in-one adhesive was the only material influenced by the presence of water at the enamel's surface. Conclusion The all-in-one adhesive behaved differently depending on whether the enamel surface was dry or wet.

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Effects of primer excess on marginal adaptation, nanoleakage and bond strength of adhesive systems after aging

Brazilian Journal of Oral Sciences ◽

10.20396/bjos.v18i0.8655289 ◽

2019 ◽

Vol 18 ◽

pp. e191456

Author(s):

Suelem Chasse Barreto ◽

Isabel Ferreira Barbosa ◽

Gisele Damiana da Silveira Pereira ◽

Carlos Tadeu dos Santos Dias ◽

Luís Alexandre Maffei Sartini Paulillo

Keyword(s):

Bond Strength ◽

Occlusal Surface ◽

Marginal Adaptation ◽

Adhesive Systems ◽

Hybrid Layer ◽

Microtensile Bond Strength ◽

Direction Parallel ◽

Surface Failure ◽

Etch And Rinse ◽

Self Etch

There is no consensus about the amount of primer inserted into the cavity. Aim: This study aimed to evaluate the effects of the amount of primer used on dentin microtensile bond strength (µTBs), nanoleakage and marginal sealing, following thermomechanical aging. Methods: 48 human third molars were selected and a box-shaped class I cavity was constructed to maintain enamel margins. Teeth were randomly assigned to 6 experimental groups (n=8). For the bonding protocols of the restorative procedure, two adhesive systems were used: three-step etch-and-rinse and two-step self-etch. Epoxy resin replicas of the occlusal surface were made, and the specimens were submitted to thermomechanical aging. Newer replicas were obtained after thermomechanical aging, and marginal adaptation was observed using SEM. To obtain sections (0.7 x 0.7 mm) for testing at a tension of 0.5 mm/min, teeth were serially sectioned in the buccallingual direction, parallel to the occlusal surface. Failure mode was then obtained. For nanoleakage evaluation, one section of each tooth was immersed in AgNO3 and evaluated using SEM. The μTBs data were submitted to a two-way ANOVA and Tukey’s test (α= 0.05) Results: One drop of primer promoted higher µTBs than two or three drops. Besides, the three-step etch-and-rinse promoted greater μTBs (19.78) than the two-step self-etch adhesive (12.23). The increase in the amount of primer was directly proportional to the increase of infiltration. All groups exhibited more gaps after thermomechanical aging. Conclusion: Using an excess of primer is not recommended because it reduces the μTBs and forms an unsatisfactory hybrid layer.

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Morphology of the Dentin–resin Interface yielded by Two-step Etch-and-rinse Adhesives with Different Solvents

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-2155 ◽

2017 ◽

Vol 18 (10) ◽

pp. 947-958 ◽

Cited By ~ 1

Author(s):

Joao Cardoso Ferreira ◽

Patrícia T Pires ◽

Álvaro F de Azevedo ◽

Sofia Arantes-Oliveira ◽

Mário J Silva ◽

...

Keyword(s):

Bond Strength ◽

Adhesive Layer ◽

Group Iv ◽

Adhesive Systems ◽

Hybrid Layer ◽

Group Iii ◽

Group I ◽

Tertiary Butanol ◽

Etch And Rinse ◽

Group Ii

ABSTRACT Aim The study aimed to analyze the morphology of the dentin–resin interface yielded by two-step etch-and-rinse adhesive systems with different solvents and compositions. Materials and methods A total of 32 dentine disks were prepared and randomly assigned to four groups of one-bottle etchand-rinse adhesive systems containing different solvents: group I, Adper Scotchbond-1XT™ (ethanol/water); group II, XP-Bond™ (tertiary butanol); group III, Prime and Bond NT® (acetone); and group IV, One Coat bond® (5% water). Adhesive systems were applied onto dentin disks, which were then thermal cycled, divided into two hemi-disks (n = 16), and prepared for field-emission scanning electron microscopy to examine the dentin–resin interdiffusion zone. Microphotographs were scanned and data were processed. Data were compared with analysis of variance multivariant test after Kolmogorov–Smirnov and Shapiro–Wilk tests using Statistic Package for the Social Sciences. Results The adhesive layer thickness average found was group I: 45.9 ± 13.41 μm, group II: 20.6 ± 16.32 μm, group III: 17.7 ± 11.75 μm, and group IV: 50.7 ± 27.81 μm. Significant differences were found between groups I and IV and groups II and III (p<0.000). Groups I (3.23 ± 0.53 μm) and II (3.13 ± 0.73 μm) yielded significantly thicker hybrid layers than groups III (2.53 ± 0.50 μm) and IV (1.84 ± 0.27 μm) (p<0.003). Group III presented a less homogeneous hybrid layer, with some gaps. Tag length average was greater in groups II (111.0 ± 36.92 μm) and IV (128.9 ± 78.38 μm) than in groups I (61.5 ± 18.10 μm) and III (68.6 ± 15.84 μm) (p<0.008). Conclusion Adhesives systems with different solvents led to significant differences in the dentin–resin interface morphology. Solvents role in adhesives bond strength should be considered together with the other adhesive system components. Clinical significance The adhesive containing tertiary butanol, in addition, seems to originate a good-quality hybrid layer and long, entangled tags and also appears to have greater ability to originate microtags, which may indicate higher bond strength. How to cite this article Ferreira JC, Pires PT, de Azevedo ÁF, Arantes-Oliveira S, Silva MJ, de Melo PR. Morphology of the Dentin–resin Interface yielded by Two-step Etch-and-rinse Adhesives with Different Solvents. J Contemp Dent Pract 2017;18(10):947-958.

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Influence of water storage time on the bond strength of etch-and-rinse and self-etching adhesive systems

Brazilian Dental Journal ◽

10.1590/s0103-64402008000300008 ◽

2008 ◽

Vol 19 (3) ◽

pp. 219-223 ◽

Cited By ~ 7

Author(s):

Darlene Cristina Ramos Eloy Dantas ◽

Ana Isabella Arruda Meira Ribeiro ◽

Lúcia Helena Marques de Almeida Lima ◽

Marcelino Guedes de Lima ◽

Gymenna Maria Tenório Guênes ◽

...

Keyword(s):

Bond Strength ◽

Testing Machine ◽

Water Storage ◽

Metallic Matrix ◽

The Self ◽

Adhesive Systems ◽

Significance Level ◽

Etch And Rinse ◽

Significant Difference ◽

Influence Of Water

The purpose of this study was to evaluate comparatively the shear bond strength (SBS) of etch-and-rinse (Adper Scotch Bond Multi Purpose - ASBMP and Adper Single Bond 2 - ASB2) and self-etching (AdheSe -AD and Adper Prompt - AP) adhesive systems after short- and long-term water storage. Eighty bovine teeth were randomly assigned to 4 groups (n=20, 10 teeth for 24 h and 10 for 6 months). After surface treatment, composite resin cylinders were made with Tetric Ceram using a bisected metallic matrix. The specimens were stored in distilled water at 37°C for either 24 h or 6 months. After these periods, shear strength was assessed in a universal testing machine (0.5 mm/min). Data were submitted to ANOVA and F test at 5% significance level. Mean SBSs (MPa) for ASBMP (10.03 ± 3.78) and ASB2 (6.10 ± 2.67) showed no statistically significant differences (p>0.05) between times. The self-etching systems did not differ significantly from each other within the 24-h period, but significant difference was found for AD (1.37 ± 0.64) after 6 months of water storage. In conclusion, the tested etch-and-rinse systems had a better performance in terms of bond durability over time than the self-etching systems.

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In Vitro Evaluation of the Effect of Different Surface Treatments of a Hybrid Ceramic on the Microtensile Bond Strength to a Luting Resin Cement

Journal of lasers in medical sciences ◽

10.15171/jlms.2019.48 ◽

2019 ◽

Vol 10 (4) ◽

pp. 297-303 ◽

Cited By ~ 3

Author(s):

Fariba Motevasselian ◽

Zahra Amiri ◽

Nasim Chiniforush ◽

Mansoreh Mirzaei ◽

Van Thompson

Keyword(s):

Bond Strength ◽

Surface Treatment ◽

Er:Yag Laser ◽

Surface Treatments ◽

Resin Cement ◽

Significance Level ◽

Significant Difference ◽

Group 5 ◽

Hybrid Ceramic

Introduction: The aim of the present study was to investigate the effect of different surface treatments of a hybrid ceramic, Vita Enamic, on the micro-tensile bond strength (µ-TBS) to resin cement. Methods: Ten blocks (3×10×8 mm) were retrieved from the original blocks and divided into 5 groups according to the different surface treatments performed: Groups 1: 35% acid phosphoric for 60 seconds (PA); group 2: Sandblasting with 50 µm Al2 O3 particles for 10 seconds (SB); groups 3: 9.5% hydrofluoric acid for 60 seconds (HF), group 4: The Er:YAG laser (2 W, 10 Hz) (ER1), group 5: The Er:YAG laser (3 W, 10 Hz) (ER2). All treated surfaces were salinized and the blocks with similar surface treatments were bonded together using a dual-cured resin cement and light-cured. After 24-hour storage in water, the blocks were cut into beams (1 mm2 ). Half of the specimens in each group (n=16) were tested immediately and the rest were subjected to thermocycling between 5°C and 55°C for 6000 cycles before the µ-TBS test at a crosshead speed of 0.5 mm/min. The data were analyzed using two-way analysis of variance (ANOVA) and Tukey HSD tests and the significance level was set at 0.05. The failure mode was evaluated by using a stereomicroscope. Results: The µ-TBS was clearly influenced by surface treatment methods (P<0.001) and thermocycling significantly decreased the bond strength values in all groups (P=0.007). The highest value (66.07 MPa ± 11.3) was obtained for the HF groups with no thermocycling and the lowest values were observed in the laser groups with no significant difference among different irradiation parameters. Adhesive failure was mainly observed in the PA and SB groups while mixed failure was predominantly shown in the laser and HF groups. Conclusion: This study demonstrated that surface treatment of VE with HF and salinization could improve the bond strength to a dual-cured resin cement, and Er:YAG laser irradiation with the evaluated parameters did not promote the adhesion of the resin cement to VE.

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Effect of Different Surface Applications and Adhesive Systems on Bond Strength of Porcelain Repair Material

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.493-494.643 ◽

2011 ◽

Vol 493-494 ◽

pp. 643-648

Author(s):

Bilge Tarcin ◽

Gulden Sinmazisik ◽

Fusun Ozer ◽

Turgut Gülmez

Keyword(s):

Bond Strength ◽

Er:Yag Laser ◽

Testing Machine ◽

Acrylic Resin ◽

Adhesive System ◽

Surface Treatments ◽

Adhesive Systems ◽

Air Abrasion ◽

Adhesive Application ◽

Self Etch

The purpose of this study was to evaluate the effect of different surface treatments and adhesive systems on bond strength of composite resin to porcelain when there is need to repair the restoration.Materials and methods: Rectangular discs (10mm x 12mm) with a height of 2mm were prepared from leucite-reinforced feldspathic ceramic CAD/CAM blocks (Vitablocs), embedded in acrylic resin, and bur cut porcelain surfaces were created. The specimens were divided into three groups (n=20) according to the surface treatments: Er:YAG laser at 2W for 20 seconds, air abrasion with 50µm Al2O3 at 2.5 bar for 15 seconds, and the last group left untreated as control. After silane (Monobond S) application on ten specimens from each group, composite rods (Aelite Flo LV) with 4.25mm diameter and 4mm height were bonded to ceramic surfaces with a self-etch adhesive system (All-Bond SE). The remaining ten specimens from each group were etched with 36% orthophosphoric acid (Blue Etch Dental Etching Gel), and after silane and bonding agent (One-Step Plus) application composite rods with the mentioned dimensions were bonded. All groups were stored in distilled water at 37°C for one day before mechanical testing. Shear testing of all groups were performed on a universal testing machine with a load cell of 50kg and at a crosshead speed of 1.5mm/min. Results were statistically analyzed using Mann Whitney U and Kruskall Wallis tests.Results: The bond strength values of the self-etch adhesive system in the lased and control groups were statistically higher in comparison to the other adhesive system (p<0.01, p<0.05, respectively). The highest bond strength values were obtained in the Er:YAG lased and self-etch adhesive applied group.Conclusions: When there is need to repair of a porcelain restoration, a self-etch adhesive application after Er:YAG laser treatment could be the method of choice.

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