scholarly journals The Effects of Cavity Preparation and Composite Resin on Bond Strength and Stress Distribution Using the Microtensile Bond Test

2018 ◽  
Vol 43 (1) ◽  
pp. 81-89 ◽  
Author(s):  
SSL Braga ◽  
LRS Oliveira ◽  
RB Rodrigues ◽  
AA Bicalho ◽  
VR Novais ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Bond Strength ◽  
Failure Modes ◽  
Composite Resin ◽  
Shrinkage Stress ◽  
Cavity Preparation ◽  
Chi Square ◽  
Chi Square Test ◽  
Post Hoc ◽  
Made In

SUMMARY Objectives: To evaluate the effect of flowable bulk-fill or conventional composite resin on bond strength and stress distribution in flat or mesio-occlusal-distal (MOD) cavity preparations using the microtensile bond strength (μTBS) test. Methods: Forty human molars were divided into two groups and received either standardized MOD or flat cavity preparations. Restorations were made using the conventional composite resin Z350 (Filtek Z350XT, 3M-ESPE, St Paul, MN, USA) or flowable bulk-fill (FBF) composite resin (Filtek Bulk Fill Flowable, 3M-ESPE). Postgel shrinkage was measured using the strain gauge technique (n=10). The Z350 buildup was made in two increments of 2.0 mm, and the FBF was made in a single increment of 4.0 mm. Six rectangular sticks were obtained for each tooth, and each section was used for μTBS testing at 1.0 mm/min. Polymerization shrinkage was modeled using postgel shrinkage data. The μTBS data were analyzed statistically using a two-way analysis of variance (ANOVA), and the postgel shrinkage data were analyzed using a one-way ANOVA with Tukey post hoc test. The failure modes were analyzed using a chi-square test (α=0.05). Results: Our results show that both the type of cavity preparation and the composite resin used affect the bond strength and stress distribution. The Z350 composite resin had a higher postgel shrinkage than the FBF composite resin. The μTBS of the MOD preparation was influenced by the type of composite resin used. Irrespective of composite resin, flat cavity preparations resulted in higher μTBS than MOD preparations (p<0.001). Specifically, in flat-prepared cavities, FBF composite resin had a similar μTBS relative to Z350 composite resin. However, in MOD-prepared cavities, those with FBF composite resin had higher μTBS values than those with Z350 composite resin. Adhesive failure was prevalent for all tested groups. The MOD preparation resulted in higher shrinkage stress than the flat preparation, irrespective of composite resin. For MOD-prepared cavities, FBF composite resin resulted in lower stress than Z350 composite resin. However, no differences were found for flat-prepared cavities. Conclusions: FBF composite resin had lower shrinkage stress than Z350 conventional composite resin. The μTBS of the MOD preparation was influenced by the composite resin type. Flat cavity preparations had no influence on stress and μTBS. However, for MOD preparation, composite resin with higher shrinkage stress resulted in lower μTBS values.

scholarly journals Effect of Die Spacer Thickness on the Microshear Bond Strength of CAD/CAM Lithium Disilicate Veneers

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Sherine Mohamed Farag ◽  
Mona Mohamed Ghoneim ◽  
Rania Reda Afifi
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Lithium Disilicate ◽  
Chi Square ◽  
Cad Cam ◽  
Chi Square Test ◽  
Group B ◽  
Post Hoc ◽  
Microshear Bond Strength ◽  
Die Spacer

Aim. The aim of this study was to compare the microshear bond strength of ceramic veneers with digital die spacer settings at 20, 40, and 100 µm. Materials and Methods. Eighteen milled lithium disilicate microdiscs (IPS e.max CAD, Ivoclar Vivadent) were divided into three groups (n = 6) according to their digital die spacer settings: group A = 20 µm, group B = 40 µm, and group C = 100 µm. Six randomly selected sound maxillary premolars received three microdiscs each. Each microdisc was 1 mm in diameter and 1 mm in height. The buccal surfaces of the premolars were prepared with a 0.5 mm depth in enamel. After cementation, the specimens were thermocycled for 2,500 cycles between 5 and 55°C. Microshear bond strength testing was performed using a universal testing machine until bonding failure. Failure modes were evaluated using a stereomicroscope. Statistical analyses included one-way ANOVA, Tukey’s post hoc test, and chi-square test with a 5% alpha error and 80% study power. Results. The mean microshear bond strength values were calculated in MPa for group A = 31.91 ± 12.41, group B = 29.58 ± 5.03, and group C = 13.85 ± 4.12. One-way ANOVA ( p ≤ 0.05 ) showed a statistically significant difference in microshear bond strength among the three groups. Tukey’s post hoc test showed significant differences between groups A and C ( p = 0.004 ) and between groups B and C ( p = 0.011 ). The failure modes were presented as cohesive, adhesive, and mixed failures. Chi-square test indicated that the failure mode distribution was not significantly different among the three groups ( p = 0.970 ). Conclusion. Higher digital die spacer settings decrease the microshear bond strength of CAD/CAM lithium disilicate veneers.

scholarly journals Evaluation of the bond strength of root-end placed mineral trioxide aggregate and Biodentine in the absence/presence of blood contamination

2016 ◽  
Vol 10 (03) ◽  
pp. 370-375 ◽  
Author(s):  
Huseyin Akcay ◽  
Hakan Arslan ◽  
Merve Akcay ◽  
Merve Mese ◽  
Naciye Nur Sahin
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Mineral Trioxide Aggregate ◽  
Storage Condition ◽  
Filling Material ◽  
Blood Contamination ◽  
Chi Square ◽  
Filling Materials ◽  
Chi Square Test ◽  
Post Hoc

ABSTRACT Objective: Mineral trioxide aggregate (MTA) has been accepted as an appropriate root-end filling material in endodontic microsurgery because of setting ability in the wet environment. The aim of this study was to assess the bond strength of root-end placed MTA and Biodentine (Septodont, Saint Maur des Fossés, France) in the absence/presence of blood contamination. Materials and Methods: Forty-eight single-rooted maxillary incisors were used. subsequent to root-end resection and apical preparation using ultrasonic retro-tips, the specimens were randomly separated into two groups according to the root-end filling materials: MTA (Cerkamed Medical Company, Stalowa, Poland) or Biodentine. The specimens were then separated into two subgroups according to storage condition (absence/presence of blood) (n = 12). After obtaining 2.0 ± 0.1 mm slices, push-out tests were performed. Each slice was examined under a stereomicroscope to evaluate the failure mode. The data were analyzed using two-way analysis of variance and Tukey's post hoc test for multiple comparisons. The failure modes were analyzed using the Chi-square test (P = 0.05). Results: The bond strength was significantly affected by the presence of blood contamination and root-end filling material type (P < 0.001). Biodentine had better bond strength than MTA (P < 0.001). The most common failure type was adhesive failure. According to the Chi-square test, there were no statistically significant differences among the groups (P = 0.394). Conclusions: Biodentine had better bond strength values compared to MTA, and the bond strength of both MTA and Biodentine as root-end filling materials was negatively affected by the presence of blood.

scholarly journals Effect of Two Microshear Test Devices on Bond Strength and Fracture Pattern in Primary Teeth

2013 ◽  
Vol 24 (6) ◽  
pp. 605-609 ◽  
Author(s):  
Tamara Kerber Tedesco ◽  
Eugenio Jose Garcia ◽  
Fabio Zovico Maxnuck Soares ◽  
Rachel de Oliveira Rocha ◽  
Rosa Helena Miranda Grande
Keyword(s):  
Bond Strength ◽  
Failure Mode ◽  
Failure Modes ◽  
In Vitro Study ◽  
Adhesive System ◽  
Fracture Pattern ◽  
Chi Square ◽  
Etch And Rinse ◽  
Chi Square Test

This in vitro study evaluated the influence of two devices for application of shear load in microshear tests on bond strength and fracture pattern of primary enamel and dentin. Eighty primary molars were selected and flat enamel (40 teeth sectioned mesio-distally) and dentin (40 teeth sectioned transversally) surfaces were obtained. Both surfaces were polished to standardize the smear layer. Two-step etch-and-rinse adhesive systems (Adper Single Bond and XP Bond) were used. Polyethylene tubes was placed over the bonded surfaces and filled with composite resin. The microshear testing was performed after storage in water (24 h/37 °C) using two devices for application of microshear loads: a notched rod (Bisco Shear Bond Tester) or a knife edge (Kratos Industrial Equipment). Failure modes were evaluated using a stereomicroscope. Bond strength data were subjected to ANOVA and chi-square test to compare the failure mode distributions (α=0.05). No significant differences were observed between the groups for dentin and enamel bond strength or fracture patterns (p>0.05). The predominant failure mode was adhesive/mixed. In conclusion, the devices for application of shear loads did not influence the bond strength values, regardless of adhesive system and substrate.

scholarly journals Long-term influence of associating an antibacterial agent with GIC on bond strength to caries-affected dentin

2017 ◽  
Vol 16 ◽  
pp. 1-10
Author(s):  
Ana Carolina de Oliveira Becci ◽  
Luana Mafra Marti ◽  
Angela Cristina Cilense Zuanon ◽  
Fernanda Lourenção Brighenti ◽  
Elisa Maria Aparecida Giro
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Multiple Comparisons ◽  
The Other ◽  
Chi Square ◽  
Chi Square Test ◽  
Term Evaluation ◽  
Storage Methods ◽  
Microshear Bond Strength

Aim: To evaluate the bond strength of a GIC associated with chlorhexidine (CHX) to sound and caries-affected dentin, immediately and after six months of storage. Methods: Sixty molars were assigned to two groups of 30 teeth. One had flat dentin surfaces produced and submitted to caries induction to obtain a caries-affected dentin.  In the other group dentin was maintained sound. Teeth of each group were randomly reassigned to three subgroups (n=10) according to the concentration of CHX added to the GIC (0%, 1% and 2% by weight).  Two specimens (1mm diameter x 1 mm high) of the same material were constructed on each dentin surface. One was submitted to the microshear bond strength (µSBS) test after 24 hours and the other after 6 months of storage in water at 37oC. Failure modes were analyzed under a stereomicroscope. Bond strength data were analyzed by three-way ANOVA followed by Games-Howell tests for multiple comparisons, and failure modes by the Chi-square test (α = 0.05). Results: The µSBS values obtained to sound dentin were higher compared with those to caries-affected dentin (p≤0.001). In sound dentin, the group with 2% CHX showed lower  µSBS values compared with 0% and 1% CHX after 24 hours (p=0.005 and p=0.032 respectively). In caries-affected dentin, after 24 hours, µSBS in group with 1% CHX was statistically higher than the values in groups with 2% CHX after 24 hours (p=0.001) and 1% CHX after 6 months (p=0.024). Irrespective of the condition of substrate, comparisons showed no statistically significant differences between the other groups (p≥0.053). Cohesive in material and mixed failures prevailed for all groups. Conclusions: The addition of CHX at concentrations of up to 2% to the GIC did not affect the bond strength of the material to sound and caries-affected dentin in a long-term evaluation.

scholarly journals Effect of Posts on the Fracture Resistance of Load-cycled Endodontically-treated Premolars Restored with Direct Composite Resin

2009 ◽  
Vol 10 (3) ◽  
pp. 10-17 ◽  
Author(s):  
Sara Majidinia ◽  
Marjaneh Ghavamnasiri ◽  
Hila Hajizadeh ◽  
Mohammad Sadegh Namazikhah ◽  
Mohammad Javad Moghaddas
Keyword(s):  
Fracture Resistance ◽  
Failure Modes ◽  
Composite Resin ◽  
Control Group ◽  
Quartz Fiber ◽  
Chi Square ◽  
Mean Values ◽  
Chi Square Test ◽  
Composite Resin Restoration

Abstract Aim The aim of this study was to investigate the fracture resistance and failure mode of premolars restored with composite resin using various prefabricated posts. Methods and Materials Sixty sound maxillary premolars were divided into four equal sized groups. All but the control group received endodontic treatment followed by placement of mesiodistocclusal (MOD) composite restorations (Tetric Ceram) as follows: Group T = no post, Group DT = fiber reinforced composite (FRC) post (DT Light), Group FL = prefabricated metal post (Filpost). The control group (C) had no cavities prepared. After thermal and load cycling, static load was applied at a 30° angle until fracture. Failure modes were categorized as restorable and non-restorable. Data were analyzed using the analysis of variance (ANOVA) and Duncan tests (α = 0.05). Results The mean values of fracture loads (N) for all groups were: C (880±258); T (691±239); DT (865±269); and FL (388±167). Statistically significant differences (P<0.05) were observed for all groups except between groups C and DT. The Chi Square test showed failure modes in groups C and DT were mostly restorable. The most non-restorable fractures were observed in group FT. Conclusion Intact teeth and the teeth restored with composite and quartz fiber posts had a similar fracture resistance and the failure modes were mostly restorable. The lowest fracture resistance and the most nonrestorable failures were observed in conjunction with metal posts. Clinical Significance The results of this in vitro study suggest the use of a quartz fiber post used in conjunction with an MOD composite resin restoration improves fracture resistance in an endodontically treated premolar. Citation Hajizadeh H, Namazikhah MS, Moghaddas MJ, Ghavamnasiri M, Majidinia S. Effect of Posts on the Fracture Resistance of Load-cycled Endodontically-treated Premolars Restored with Direct Composite Resin. J Contemp Dent Pract 2009 May; (10)3:010-017.

scholarly journals Avaliação dos tratamentos de superfície na resistência de união entre dois pinos de fibra de vidro e uma resina composta

2021 ◽  
Vol 62 (1) ◽  
pp. 44-55
Author(s):  
Andreza Barbosa Santos Guimarães ◽  
Rana De Brito Granja ◽  
Emily Vivianne Freitas da Silva ◽  
Roberta Novis ◽  
Blanca Liliana Torres Léon
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Testing Machine ◽  
Strength Analysis ◽  
Chi Square ◽  
Significance Level ◽  
Fiber Posts ◽  
The Matrix ◽  
Chi Square Test ◽  
Glass Fiber Posts

Introduction: The aim of this study was to evaluate the influence of different surface treatment methods on glass-fiber posts relative to their bond strength with the composite resin and to evaluate the types of failures that occurred. Materials and Methods: Thirty-six posts from WhitepostDC (FG group) and Exacto Conics (AG group) were used, divided into: Control FG-1 and AG-1 groups – application of silane, according to manufacturers’ specifications; FG-2 and AG-2 groups – conditioning with 10% hydrogen peroxide and silanization; FG-3 and AG-3 groups – aluminum oxide blasting for 10 seconds and silaniza-tion. The composite resin was added in 2-mm increments, each increment was photopolymerized for 40 seconds, until the entire length of the matrix was filled. Then, the assembly (fiber post and composite resin) was sectioned into three portions (cervical, middle and apical) (n = 18). Samples were submitted to the bond strength analysis by a push-out test in a Universal Testing Machine and the failure types were evaluated with a 30 × magnification with an optical micro-scope. Data were submitted to the analysis of variance, the Tukey test, and the chi-square test with a 5% significance level. Results: For AG groups, the treatment with silane (23.10 MPa) resulted in statistically greater bond strength than the treatments with peroxide (17.19 MPa) and blasting (16.28 MPa). It was found that the bond strength was statistically higher in the middle third (21.16 MPa) than in the apical third (12.55 MPa) for the peroxide treatment. The mixed-type failure had the highest prevalence (57.01%). Conclusion: Silane treatment showed statistically greater bond strength values, when the Angelus brand was tested.

Evaluation of the effect of cetrimide with edta on Microhardness and surface changes in root dentin – An invitro study

2019 ◽  
Vol 11 (1) ◽  
pp. 3-11
Author(s):  
Dr. Swarooparanil Patil ◽  
Dr. B.S. Keshava Prasad
Keyword(s):  
Surface Erosion ◽  
Distilled Water ◽  
Test Results ◽  
Chi Square ◽  
Chi Square Test ◽  
Root Dentin ◽  
Group 3 ◽  
Post Hoc ◽  
Hardness Values ◽  
Surface Changes

The aim of the study was to evaluate the effect of different concentrations of cetrimide with or without EDTA solution on the microhardness and surface changes in root dentin. Single rooted human mandibular premolar teeth were decoronated and sectioned longitudinally. The root segments were horizontally embedded in autopolymerizing resin. These specimens were randomly divided into 6 experimental groups according to the irrigating solution used. The irrigating solutions used were 5% EDTA, 5%EDTA + 0.25% Cetrimide, 5%EDTA + 0.50% Cetrimide, 0.25% Cetrimide, 0.50% Cetrimide and distilled water. Each group was further divided into two subgroups. First subgroup specimens were employed for microhardness testing using vicker’s indenter. Second subgroup specimens were used to evaluate the surface changes of root dentin under stereomicroscope. Comparison of the mean microhardness of test groups was done using ANOVA followed by post hoc Tukey’s test. Pre- and post- treatment hardness values were compared using student paired t test. The data obtained from surface erosion scoring was subjected to statistical analysis using Chi square test. Results of this study showed significant reduction in the microhardness of dentin for all the groups except for the distilled water (p<0.001). The greatest reduction in dentin microhardness was observed with Group-3 (5% EDTA + 0.50% CTR). Specimens in 5% EDTA group showed greater erosion than other groups. Within the limitations of this study it was concluded that all the tested irrigating solutions reduced the microhardness of root dentin except distilled water. Maximum reduction in microhardness was observed with addition of 0.50% cetrimide to EDTA. EDTA increased the surface roughness of root dentin irrespective of cetrimide association. Use of cetrimide at concentrations higher than 0.25% would be detrimental to the microhardness of dentin.

scholarly journals N-Acetyl Cysteine Ameliorates Hepatotoxicity Associated with the Use of Methotrexate in Mice

2021 ◽  
Vol 15 (5) ◽  
pp. 1008-1010
Author(s):  
Aamna Khokhar ◽  
Iram Kehkashan Khurshid ◽  
Sadia Lodhi ◽  
Alia Sarfaraz ◽  
Muhammad Arif ◽  
...  
Keyword(s):  
Histopathological Examination ◽  
Controlled Trial ◽  
Protective Role ◽  
Ethical Review ◽  
Trial Methodology ◽  
Chi Square ◽  
Medical College ◽  
Respective Treatment ◽  
Chi Square Test ◽  
Post Hoc

Background: Liver is not only involved in maintaining homeostasis but also exhibits significant role in metabolism and detoxification of various drugs and toxins. Aim: To explore the hepato-protective role of N-acetylcysteine against methotrexate induced hepato-toxicity. Study design: Randomized controlled trial. Methodology: This study having mice (n=18) was carried out after ethical review committee’s (ERC) approval at Foundation university medical college in collaboration of National institute of health, Islamabad in 2017. Single intraperitoneal injection (20mg/kg) of methotrexate induced hepato-toxicity. Hepatoprotective effect was assessed by oral administration N-acetylcysteine (50mg/kg) alone with methotrexate. The extent of liver damage and effect of protective agents were determined by measuring serum ALT, AST, ALP after 24 hours of respective treatment. Liver samples were taken for histological analysis. One way ANOVA followed by Post Hoc Tukey test was applied for multiple comparisons of biochemical markers between the groups. Histopathological findings were analyzed by Chi Square test. p < 0.05 was considered significant. Results: Significant (p < 0.05) hepatotoxicity was seen with substantial elevation in serum ALT, AST and ALP with methotrexate. N-acetylcysteine attenuated the methotrexate induced hepatotoxicity significantly (p < 0.05). The histopathological examination showed mild steatosis along with focal pleomorphism in the liver of mice that received methotrexate in comparison to group treated with N-acetylcysteine and methotrexate though minimal inflammation was seen. Conclusion: We concluded that N-acetylcysteine ameliorates the methotrexate induced hepatotoxicity on when used concomitantly. Keywords: Hepatotoxicity, N-acetylcysteine and Methotrexate

The History of 34 Errors Identified in 874 Patients Analyzed at Weekly Clinical-Pathological Meetings in Two Institutions over 22 Years (1982–2004).

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 5287-5287 ◽  
Author(s):  
Evarist Feliu ◽  
Blanca Xicoy ◽  
Maria Rozman ◽  
Fuensanta Milla ◽  
Josep-Lluis Aguilar ◽  
...  
Keyword(s):  
Improve Patient Care ◽  
Good Method ◽  
Chi Square ◽  
Acute Leukemias ◽  
Chi Square Test ◽  
Life Threatening ◽  
History Of ◽  
The Difference ◽  
Logistic Support ◽  
Made In

Abstract Clinical-pathological sessions are a good method for solving diagnostic and/or therapeutic problems in patients with hemopathies. In these sessions, errors made during health care given to the patient can be detected. By analyzing how and why these errors are made, we can improve patient care and prevent further mistakes. The objective of this study is to describe 34 errors identified in 874 patients with hemopathies at clinical-pathological meetings in two centers, performed with the aim of solving a diagnostic problem and/or a therapeutic decision or due to a great interest of the case, in two institutions, over 22 years (1982–2004). An intererdisciplinary team of hematology specialists gathered every week at interactive sessions of about 45 minutes each, in both institutions. The methodology of sessions was: a description of the medical history of a patient in a one or two-page report and a revision of the different samples (peripheral blood, bone marrow and lymph node morphology, immunocytochemistry, flow-cytometry, cytogenetic and molecular studies) with the aid of a microscope and a TV monitor. A diagnostic and/or treatment were proposed at the end of the session. Eight-hundred and seventy-four reports were analyzed. All the diagnostics were classified: chronic lymphoproliferatives disorders (445), myeloproliferative and myelodysplastic syndromes (136), acute leukemias (136), other haematological diseases (74), non-haematological diseases (31), without a diagnosis after the meeting (52). We identified diagnostic (D) and therapeutic (T) mistakes and considered as the main causes of the medical error (mistake in the diagnosis and/or treatment): lack of expertise (LE), malpractice (MP), impetuosity (IM), bad logistic support (LS), inexplicable (IN). We divided the 22 years into two decades and each error was classified in one of these two groups. Our own mistakes (OM) and the errors made in other institutions (OI) were identified. A comparison between number of errors made in the first 11 years and the second 11 years was made using a Chi-square test. P&lt;0.05 was considered statistically significant. Thirty-four errors (4 %) were detected, being more D and T (20) rather than only D (14). The type of error detected was: 17 LE, 7 MP, 5 IM, 3 LS, 2 IN. Twenty errors were OM and 14 were made in OI. The difference in the proportion of errors detected during the first and the second decade (6.6 % vs 2.8 %, respectively) was statistically significant (p=0.05). No error led to the death of any patient or were life-threatening in any way. Errors may be made in the diagnosis and treatment of hematologic patients. Although the rate of error found appears to be high, it can be considered as low, since the cases were presented in scientific sessions because of diagnostic and/or therapeutic problems. One of the best ways of improving how to care for future patients is to detect and analyze the errors made. Many lessons can be learnt in this way.

scholarly journals Influence of Etching Mode and Composite Type on Bond Strength to Biodentine Using a “No-Wait” Universal Adhesive

2021 ◽  
pp. 354-365
Author(s):  
Ayça Sarialioğlu Güngör ◽  
Betül Aycan Uysal
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
High Viscosity ◽  
Resin Composites ◽  
Universal Adhesive ◽  
Low Viscosity ◽  
Composite Type ◽  
Etch And Rinse ◽  
No Wait ◽  
Post Hoc

The purpose of this study was to compare the shear bond strength (SBS) of four resin-based composite materials to a silicate-based cement using a “no-wait” universal bond with self-etch (SE) and etch-and-rinse (ER) modes. Acrylic blocks (n=80, 2mm depth, 5mm diameter central hole) were prepared. The holes were filled with BiodentineTM (BD) and divided into 4 main groups (n=20) according to the composite resin type used: Group FZ250: FiltekTM Z250 Universal Restorative (microhybrid), Group SDR: SDR Plus U Bulk Fill Flowable (low-viscosity bulk-fill), Group FBP: FiltekTM Bulk Fill Posterior (high-viscosity bulk-fill), Group EF: EsFlow™ Universal Flowable Composite (nanohybrid). A ‘no-wait’ universal bond (Clearfil Universal Bond Quick) was used for bonding application. Then each group was divided into 2 subgroups according to the etching mode applied (ER and SE). SBSs were measured and stereomicroscope was used to identify the failure modes. Selected samples of fracture surfaces were imaged by SEM. Tukey’s post-hoc and One-way ANOVA tests were used to analyze data. There were statistically significant differences among the composite groups (p<0.05). When SDR  showed the highest bond strength values in SE (17.13 ± 2.98 MPa) mode, FBP showed the lowest bond strength values in ER (8.89 ± 2.46 MPa) mode. The mean SBS was not different between the SE and ER modes (p> 0.05). The SBS of BD to the resin composites depends on the composite type but  application of the ‘no-wait’ universal bond in different etching modes is regardless of the SBS of BD to resin composites.

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