International Journal of Adhesion and Adhesives最新文献

{"title":"Zinc zeolite nanoparticle-modified adhesive resin: Influence on dentin matrix degradation and bond strength to dentin","authors":"Pinar Altinci ,&nbsp;Murat Mutluay ,&nbsp;Arzu Tezvergil-Mutluay","doi":"10.1016/j.ijadhadh.2024.103890","DOIUrl":"10.1016/j.ijadhadh.2024.103890","url":null,"abstract":"<div><h3>Purpose</h3><div>Endogenous dentin enzymes degrade collagen fibrils in the restoration-dentin interface. Zinc has been identified as a potential enhancer of adhesive interface stability of adhesive interface by inhibiting enzymatic activity. The present study aimed to investigate the degradation resistance of adhesive interfaces created by a resin adhesive containing zinc zeolite nanoparticles.</div></div><div><h3>Materials and methods</h3><div>Dentin beams (1 mm x 2 mm x 6 mm), completely demineralized in 0.5 M EDTA and treated with 10 % phosphoric acid for 15 min (control), were immersed in experimental resin (40 % bis-GMA, 30 % TCDM, 28.75 % TEGDMA, and 1 % EDMAB) modified with 0, 2, 5 and 10 wt% zinc zeolite nanoparticles for 2 h. Each beam was then incubated in artificial saliva medium for 1, 3, 7, 14 and 30 days, with dry mass loss measured at each time-point. Hydroxyproline and CTX contents were analyzed in the incubation medium. Zinc release from zinc zeolite-containing resin disks was measured with atomic emission spectroscopy. The microtensile bond strength (μTBS) of zinc zeolite-modified adhesive resin (All Bond Universal, Bisco Inc.) to dentin was also tested. The data were analyzed using repeated measures of ANOVA, and ANOVA and post-hoc Tukey HSD tests at p = 0.05.</div></div><div><h3>Results</h3><div>Zinc zeolite at 10 wt% showed higher mass loss at all time-points, except on the 1-day (p &lt; 0.05). No significant difference was found in hydroxyproline contents of the incubation medium (p &gt; 0.05), however, the CTX quantity was higher in the zinc zeolite 10 % group (p &lt; 0.05). Zinc release was confirmed for zeolite groups, reaching the maximum level at the 7 days of incubation. Zinc zeolite at 10 wt% resulted in significantly lower μTBS (p &lt; 0.05).</div></div><div><h3>Conclusions</h3><div>Zeolite nanoparticles incorporated in dentin adhesives may serve as ion reservoirs. However, zinc content of zeolite particles should be adjusted according to the optimum levels for the inhibition of dentin enzymes.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103890"},"PeriodicalIF":3.2,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANN prediction of mode I fracture energy in epoxy adhesive joints: Adherend, adhesive, and strain rate effects","authors":"Mohammad Abrishamian,&nbsp;Amir Nourani","doi":"10.1016/j.ijadhadh.2024.103888","DOIUrl":"10.1016/j.ijadhadh.2024.103888","url":null,"abstract":"<div><div>In this investigation, the mode I fracture behavior of an epoxy adhesive joint has been investigated to probe the combined effects of adherend Young's modulus and thickness, strain rate, and adhesive length. Experimental fracture testing was conducted on double-cantilever beam (DCB) specimens under three various strain rate thresholds, namely, quasi-static (0.0005 s⁻¹), low (0.015 s⁻¹), and intermediate (0.5 s⁻¹). The specimens were constructed with varying adherend materials (i.e., copper, aluminum), thickness (12–20 mm), and adhesive lengths (25–75 mm). The fracture load was measured in each experiment, and the critical strain energy release rate, J_Ci, was calculated via a finite element analysis (FEA) in each case. Results with a 95 % confidence interval showed adherend thickness had a negligible effect within the investigated range (p-value = 0.462). J_Ci was significantly impacted by adhesive length (p-value = 0.009) and two other investigated parameters (p-values = 0.000). The development of artificial neural networks (ANNs) with Levenberg-Marquardt (LM) led to the prediction of J_Ci based on the examined parameters. With a mean absolute percentage error (MAPE) of 8.9 % and a mean squared error (MSE) of 683 J²/m⁴ on unseen test data, the ANN model built in this study was able to predict the J_Ci in epoxy adhesive joints, indicating its potential to produce an accurate prediction for J_Ci in epoxy adhesive joints. This work offers insights for precise fracture behavior prediction under mode I stress conditions as well as some helpful information that can be utilized to optimize adhesive joint design.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103888"},"PeriodicalIF":3.2,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of mode I and III fracture toughness of a structural silicone sealant","authors":"F. Rheinschmidt,&nbsp;J. Schneider,&nbsp;P.L. Rosendahl","doi":"10.1016/j.ijadhadh.2024.103881","DOIUrl":"10.1016/j.ijadhadh.2024.103881","url":null,"abstract":"<div><div>The present study focusses on the experimental determination of mode <span><math><mi>I</mi></math></span> and <span><math><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></math></span> fracture toughness for structural silicone sealants. Large deflections are explicitly considered in the theoretical framework employed for evaluating the experiments. Tests are performed with a structural silicone sealant manufactured in thin layers. Double cantilever beam specimen are loaded with out-of-plane shear to measure the mode <span><math><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></math></span> fracture toughness of the adhesive. The methodology of the evaluation is validated numerically. The assumptions made in the development of the theoretical framework result in a maximum deviation between numerical results and the approximation formula of less than 10%. Additionally, double cantilever beam specimen are submitted to cleavage loading in order to determine the mode <span><math><mi>I</mi></math></span> fracture toughness. We measure a mode <span><math><mi>I</mi></math></span> fracture toughness of DOWSIL™ TSSA of <span><math><mrow><msub><mrow><mi>G</mi></mrow><mrow><mi>I</mi><mi>c</mi></mrow></msub><mo>=</mo><mrow><mo>(</mo><mn>3</mn><mo>.</mo><mn>64</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>91</mn><mo>)</mo></mrow><mspace></mspace><mi>N/mm</mi></mrow></math></span>. In case of out-of-plane shear loading, the fracture toughness is found to be <span><math><mrow><msub><mrow><mi>G</mi></mrow><mrow><mi>I</mi><mi>I</mi><mi>I</mi><mi>c</mi></mrow></msub><mo>=</mo><mrow><mo>(</mo><mn>7</mn><mo>.</mo><mn>03</mn><mo>±</mo><mn>0</mn><mo>.</mo><mn>94</mn><mo>)</mo></mrow><mspace></mspace><mi>N/mm</mi></mrow></math></span>. The outlined experiments are suitable for arbitrary nonlinear elastic materials undergoing large deflections during fracture toughness testing.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103881"},"PeriodicalIF":3.2,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of load-displacement curves of an adhesive-reinforced composite patch repaired plate using the combination of XFEM and CZM techniques","authors":"M. Benyettou ,&nbsp;K. Madani ,&nbsp;S.C. Djebbar ,&nbsp;H. Amin ,&nbsp;M. Belhouari ,&nbsp;M. Elajrami ,&nbsp;X. Feaugas ,&nbsp;R.D.S.G. Campilho","doi":"10.1016/j.ijadhadh.2024.103885","DOIUrl":"10.1016/j.ijadhadh.2024.103885","url":null,"abstract":"<div><div>Since the development of the eXtended Finite Element Method (XFEM), Cohesive Zone Modelling (CZM), and the Virtual Crack Closure Technique (VCCT) for damage analysis in repaired structures, it has now become easy to validate experimental tensile tests carried out on damaged and repaired plates with a composite patch. In most cases, these tensile tests can be expensive and time-consuming due to surface preparation, cleaning, polishing, adhesive application, and the crosslinking time of the adhesive, which must be carefully considered. The analysis of damage in structures assembled by adhesive bonding is crucial to predicting their behavior under various loading conditions. Moreover, the analysis of experimental curves is in most cases translated a global behavior without taking into account the details that can influence the results. With the introduction of techniques (XFEM, CZM and VCCT), it is now possible to model different forms of damage, accounting for several mechanical and geometric parameters of the plate, patch, and adhesive. This work aims to analyze the behavior under tensile loading of a 2024-T3 aluminum plate presenting an initial crack of different lengths emanating from a central circular notch. This plate is repaired by a carbon/epoxy type patch through an adekit A140 adhesive. The combined use of XFEM to track damage in the plate and CZM for adhesive debonding allowed the acquisition of tensile load-elongation curves and the assessment of damage inflicted by loading on the plate. The results demonstrate that the combined use of XFEM and CZM techniques enables the identification of the adhesive debonding impact on the load transfer to the patch and consequently on the strength of the repaired structure. Furthermore, these highlight that the decrease in the effectiveness of the composite patch with increasing crack size is directly linked to the progressive deterioration of both the plate and the adhesive strength.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103885"},"PeriodicalIF":3.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical and experimental analysis of Al/GFRP joint for optimization of adhesive bonding strength using response surface method by considering surface patterning of the joints","authors":"Mohammad Reza Samadi,&nbsp;Mohammad Hossein Alaei,&nbsp;Jafar Eskandari Jam","doi":"10.1016/j.ijadhadh.2024.103877","DOIUrl":"10.1016/j.ijadhadh.2024.103877","url":null,"abstract":"<div><div>Nowadays, adhesive bonding of metals and composites is widely used in the aerospace, automotive and military industries. In the present research, the finite element analysis (FEA) and response surface method (RSM) are used to optimize adhesive bonding strength between aluminum (Al) and glass fiber reinforced polymer (GFRP). For this purpose, the influence of the parameters of joint type, groove shape, groove number, and groove angle was investigated on the bonding strength. The joint type includes Al/Al, Al/GFRP and GFRP/GFRP, the groove shape includes V-shape, square and concave, the groove number includes 1, 3 and 5 grooves, and the groove angle includes 0, 45 and 90°. In order to model the crack growth in the simulation of adhesive bonding, the cohesive zone model was applied. Finally, the optimal sample is fabricated to examine its strength in temperature-humidity environmental conditions. The results of simulation and optimization indicated that the bonding strength improved in Al/Al mode with one square groove at 0° groove angle. The stress-strain diagram obtained from the simulation and optimization results was in good agreement with the sample made under optimal conditions. Moreover, the tensile strength of the optimal sample at temperature-humidity conditions was higher than the tensile force of the sample without groove.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103877"},"PeriodicalIF":3.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical investigation of patch geometry effect on the fatigue life of aluminum panels containing cracks repaired with CFRP composite patch using XFEM and CZM approach","authors":"Emad Mosayyebi,&nbsp;Tajbakhsh Navid Chakherlou","doi":"10.1016/j.ijadhadh.2024.103882","DOIUrl":"10.1016/j.ijadhadh.2024.103882","url":null,"abstract":"<div><div>This study investigated numerically the effect of using composite patches with various geometric shapes to improve the fatigue life of aluminum panels of AA7075-T6 and AA2024-T3 containing cracks and compared with the available experimental results. The Cohesive Zone Model (CZM) and Extended Finite Element Method (XFEM) were applied to static and fatigue analyses. Four types of rectangular, trapezoidal, left-oriented triangular and right-oriented triangular composite patches were used in the numerical analysis. With the combination of XFEM and CZM methods, and using the Paris equation, the fatigue crack propagation and fatigue life of aluminum panels containing cracks can be reasonably predicted. A composite patch with a suitable shape and geometry, fatigue life of the repaired panel can be improved considerably. With a 204 % improvement in fatigue life in comparison to the unrepaired panel, the repaired sample made of aluminum alloy AA2024-T3 alloy achieved the most significant improvement in fatigue life. In AA7075-T6 alloy samples repaired with composite patches, the samples repaired with rectangular and trapezoidal patches experienced the highest fatigue life increases, respectively with 342 % and 290 % compared to the unrepaired samples. The comparison of numerical simulation results with the available experiment results shows a good agreement.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103882"},"PeriodicalIF":3.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the moisture absorption percentage in the adhesive layers of carbon fiber reinforced plastic joints via electromagnetic induction testing and diffusion analysis","authors":"Wataru Matsunaga ,&nbsp;Satoshi Imai ,&nbsp;Yoshihiro Mizutani ,&nbsp;Tetsuo Yasuoka ,&nbsp;Akira Todoroki","doi":"10.1016/j.ijadhadh.2024.103883","DOIUrl":"10.1016/j.ijadhadh.2024.103883","url":null,"abstract":"<div><div>In this study, we propose a method that combines moisture absorption analysis and electromagnetic induction testing (EIT) to detect weak bonds formed in the adhesive layers of carbon fiber reinforced plastic (CFRP) joints due to moisture absorption. Although EIT is effective for assessing CFRP joint adhesive moisture absorption, early-stage detection of weak bonds is challenging. Our method addresses this by combining calculations of moisture absorption percentage via the diffusion equation and EIT-based measurements. First, we conducted diffusion analysis using the finite difference method (FDM). The moisture absorption percentage calculated via the FDM was validated by comparing it with the results of the moisture absorption tests of the CFRP adhesive joints, and good agreement was observed. Second, EIT was applied to the CFRP adhesive joints, and the experimental results indicated that the moisture absorption percentage of the CFRP joint can be qualitatively evaluated using EIT. Finally, the moisture absorption of the CFRP joint adhesive layer was quantitatively evaluated by combining the results of EIT on the CFRP joints with those of the numerical analysis. Therefore, the proposed method enables the previously difficult quantitative evaluation of the early-stage moisture absorption percentage of CFRP joint adhesive layers and is effective for the detection of weak bonds created by moisture absorption in CFRP joints.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103883"},"PeriodicalIF":3.2,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142652773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and characterization of UV-Curable phosphate ester-containing acrylate resin adhesive for dental zirconia restorations","authors":"Xiaolong Li ,&nbsp;Shaohua Luo ,&nbsp;Haitao Ma ,&nbsp;Ningyuan Du","doi":"10.1016/j.ijadhadh.2024.103874","DOIUrl":"10.1016/j.ijadhadh.2024.103874","url":null,"abstract":"<div><div>Fumed silica was utilized as a filler, methacryloyloxydecyl dihydrogen phosphate (MDP) served as a reactive monomer, and acrylate acted as a resin monomer to develop zirconia adhesives for dental acrylate resins containing phosphate esters. A uniform design, orthogonal tests, and single-variable experiments were conducted to vary the composition of each component. The effects of different composition ratios on the mechanical properties, hydrophilicity, flowability, and volumetric shrinkage of dental resin adhesives were studied in detail. The resin matrix composition included 43.6 wt% Bis-GMA, 28.2 wt% triethylene glycol dimethacrylate (TEGDMA), and 28.2 wt% hydroxyethyl methacrylate (HEMA). The photocurable system composition consisted of 4 % camphorquinone (CQ), 2.4 % ethyl 4-dimethylaminobenzoate (EDB), 3.2 % dimethylaminoethyl methacrylate (DMAEMA), and 1 % butylated hydroxytoluene (BHT). The adhesive monomer was 12 % MDP, and the filler system comprised 2 % R972 and 3 % OX50. The light curing time was set at 60 s. The adhesive exhibited optimal performance with a bonding strength of 35.9 MPa and a volumetric shrinkage of 13.3 %. According to this study, the proposed zirconia adhesive featuring a phosphate-containing acrylic ester group is a potential light-curing dental resin adhesive with a straightforward synthesis procedure, minimal volumetric shrinkage, good bonding strength, and an appropriate photocuring time.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103874"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of glass-ceramic thickness on the degree of conversion, polymerization shrinkage stress, and bond strength of resin cements","authors":"Roberta Cristina Costa Guimarães ,&nbsp;Dayane de Oliveira ,&nbsp;Mateus Garcia Rocha ,&nbsp;Jean-François Roulet ,&nbsp;Saulo Geraldeli ,&nbsp;Mario Alexandre Coelho Sinhoreti","doi":"10.1016/j.ijadhadh.2024.103871","DOIUrl":"10.1016/j.ijadhadh.2024.103871","url":null,"abstract":"<div><div>The aim of this study was to evaluate the effect of ceramic disc thicknesses on light attenuation, degree of conversion (DC), polymerization shrinkage stress (PSS), and microshear bond strength (μSBS) of dual-cured (RelyX Universal, and RelyX Ultimate) and light-cured (Variolink N LC, and Variolink Esthetic LC) resin cements. Forty ceramic discs were fabricated using lithium disilicate glass-ceramic in thicknesses of 0.7, 1.5, and 2.5 mm. For the μSBS test (n = 10), resin cement rods were bonded to the ceramic discs through Tygon tubes with 0.7 mm internal diameter and tested after 24 h in water at 37 °C. For the PSS test (n = 5), glass rods were aligned with a 1 mm gap filled with resin cement and light-cured, with displacement measured by software. Light attenuation analyses (n = 1) involved positioning discs at the light-curing unit tip and measuring radiant emittance. For the DC test (n = 3), an ATR-FTIR spectrometer measured light-cured specimens through each ceramic disc. Data were analyzed using two-way ANOVA and the Tukey test (α = 0.05). The results showed that the 1.5- and 2.5-mm thick ceramics significantly attenuated the light transmission and, consequently, reduced the mean values of μSBS, DC, and PSS for all resin cement used. Clinically, thicker ceramics reduce light transmission, which may compromise the polymerization of the resin cement. Dual-cure cements are preferable for thicker restorations because of their ability to compensate for the reduced light.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103871"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"30-Month performance of a 10-MDP based universal adhesive system under mechanical and biological perspectives","authors":"Marina Ciccone Giacomini ,&nbsp;Linda Wang ,&nbsp;Giovanna Speranza Zabeu ,&nbsp;Polliana Mendes Candia Scaffa ,&nbsp;Cristina de Mattos Pimenta Vidal ,&nbsp;Mylena Proença Costa","doi":"10.1016/j.ijadhadh.2024.103869","DOIUrl":"10.1016/j.ijadhadh.2024.103869","url":null,"abstract":"<div><div>Strategies towards the long-term durability of dentin-adhesive interface is the goal of many investigations. As the universal dentin bonding systems (DBS) represents a promissory category, other approaches seem to be refrained. Besides their chemical capacity to bond to dentin, their ability in terms of suppression of dentin metalloproteinases of matrix at the interface is unclear. This study aimed to evaluate the long-term adhesive performance and gelatinolytic activity effect of a 10-MDP-based universal DBS compared with 2 % chlorhexidine digluconate (CHX) as control to connect the understanding of mechanical and biological mechanisms. For this, bond strength to dentin (μTBS) and <em>in situ</em> zymography (Z) at initial, 6-month, and 30-month aging times were run. 102 sound human molars were randomized according to DBS: Adper Single Bond 2 – (SB - MDP-free control); Adper Single Bond Universal in etch-and-rinse (SUER) and self-etching (SUSE) modes. They were subdivided according to dentin pretreatment: W- water or CHX-2% (30s-passive application). The specimens were restored according to the manufacturer's instructions. For μTBS (n = 12), beams (0.64 mm²) were obtained and tested (500N/0.5 mm/min). For Z (n = 5), 0.1 mm-thick slices were incubated with fluorescein-conjugated gelatin (24h/37 °C) and analyzed by confocal laser scanning microscopy. Data were analyzed by three-way ANOVA and Tukey's test (p &lt; 0.05). At 6-month, CHX effectiveness was observed in some circumstances under both tests. However, 30-month assessments evidenced no difference neither among the groups regardless of DBSs nor pretreatment for all comparisons, despite some peculiarities detected under Z. It is concluded that the 10-MDP universal DBS present limited action over the proteolytic action.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103869"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}