6,280 results match your criteria shear bond

Analysis of bond strength between a nylon reinforcement structure and dental resins.

J Clin Exp Dent 2021 May 1;13(5):e505-e510. Epub 2021 May 1.

Department of Prosthodontics and Dental Materials, São Paulo State University (Unesp) - Institute of Science and Technology, São José dos Campos - SP, Brazil.

Background: Nylon is a polymer that its use to reinforce dental resins has shown positive results such as increased flexural strength. The aim of this study was to evaluate the bond strength between dental resins and a nylon reinforcement.

Material And Methods: Forty cylindrical nylon blocks with 13 x 23 mm with 0. Read More

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Dentin bond strengths of all-in-one adhesives combined with different manufacturers' flowable resin composites.

Dent Mater J 2021 May 11. Epub 2021 May 11.

Department of Operative Dentistry, The Nippon Dental University School of Life Dentistry at Niigata.

The present study aimed to evaluate the dentin bond strengths of all-in-one adhesives in combination with flowable-resin-composites of different manufacturers. The materials used in this study were two all-in-one adhesives (BeautiBond Multi, BM, and Clearfil Bond SE ONE, SE) and four flowable resin composites (Clearfil Majesty ES Flow, CME; Estelite Flow Quick, EFQ; MI Flow II, MIF; and Beautifil Flow Plus F03, BFP). By combining each all-in-one adhesive and flowable resin composite, eight experimental groups were established. Read More

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Methodological proposal for evaluation of adhesion of root canal sealers to gutta-percha.

Int Endod J 2021 May 11. Epub 2021 May 11.

Department of Endodontics, Fluminense Federal University, Niterói Rio de Janeiro, Brazil.

Aim: To compare the bond strength of an epoxy resin-based sealer and two calcium silicate-based sealers (CSS) to gutta-percha disks using a new method.

Methodology: Round disks of gutta-percha (n = 60), measuring 10 mm in diameter and 2 mm in thickness, were placed on a glass plate and a drop of each sealer (AH Plus, EndoSequence BC Sealer and EndoSeal MTA) was placed on their surface. Another identical disk was placed onto the first one and a standardized weight (0. Read More

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Comparison of Shear Bond Strength of Three Commercially Available Esthetic Restorative Composite Materials: An Study.

Int J Clin Pediatr Dent 2020 Nov-Dec;13(6):635-639

Department of Pedodontics, Saveetha Dental College, Chennai, Tamil Nadu, India.

Introduction: Dental caries remains to be one of the most prevalent diseases encountered in the field of dentistry. Several restorative materials have been introduced with variable properties and among them, composite restorative materials are most widely used nowadays because of their superior esthetic property as well as minimal hard tissue removal. Shear bond strength of a restorative material plays a key role in deciding the restoration's longevity. Read More

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Effect of Cathodic Arc Plasma Deposition on Shear Bond Strength between Palladium Cobalt Chromium Coated with Titanium Nitride and Titanium Aluminium Nitride with Ceramic.

Contemp Clin Dent 2021 Jan-Mar;12(1):49-54. Epub 2021 Mar 20.

Department of Prosthodontics, SRM Dental College, Chennai, Tamil Nadu, India.

Background: The success of esthetic ceramo-metal restoration is strongly influenced by its bond strength. The success of ceramo-metal restoration is subjective to its bond strength.

Aim And Objectives: The aim of this study is to evaluate the shear bond strength between palladium-based cobalt chromium (Co-Cr) alloy coated with titanium nitride (TiNi) and titanium aluminum nitride with feldspathic ceramics. Read More

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A hierarchical clustering method of hydrogen bond networks in liquid water undergoing shear flow.

Sci Rep 2021 May 5;11(1):9542. Epub 2021 May 5.

State Key Laboratory of Hydro-Science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China.

Many properties of water, such as turbulent flow, are closely related to water clusters, whereas how water clusters form and transform in bulk water remains unclear. A hierarchical clustering method is introduced to search out water clusters in hydrogen bonded network based on modified Louvain algorithm of graph community. Hydrogen bonds, rings and fragments are considered as 1st-, 2nd-, and 3rd-level structures, respectively. Read More

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Physicochemical properties and biological effects of quaternary ammonium methacrylates in an experimental adhesive resin for bonding orthodontic brackets.

J Appl Oral Sci 2021 3;29:e20201031. Epub 2021 May 3.

Universidade Federal do Rio Grande, Pós-Graduação em Odontologia da do Sul, Porto Alegre, RS, Brasil.

Methodology: Fixed orthodontic appliances may lead to biofilm accumulation around them that may increase caries risk. This study aimed to evaluate the influence of quaternary ammonium methacrylates (QAMs) on the physicochemical properties, cytotoxicity, and antibacterial activity of adhesive resins for orthodontic purposes. A base resin was prepared with a comonomer blend and photoinitiator/co-initiator system. Read More

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Adhesion between zirconia and resin cement: A critical evaluation of testing methodologies.

J Mech Behav Biomed Mater 2021 Apr 21;120:104547. Epub 2021 Apr 21.

Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Institute of Science and Technology, 777 Eng. Francisco José Longo Avenue, 12245-000, São José Dos Campos, SP, Brazil. Electronic address:

This study aimed to analyze different methodologies (tensile, microtensile, shear, microshear, and interfacial toughness) for evaluation of the bond strength between zirconia (Y-TZP) and resin cement. Zirconia ceramic blocks (VITA in-Ceram® YZ, VITA Zahnfabrik, Germany) were obtained, substrate surfaces were air-abraded with aluminum oxide (50 μm) for 10 s (2 bar pressure, distance: 10 mm, angle: 90°). Then, the specimens were washed with distilled water, dried, and coated with Clearfil Ceramic Primer that was actively applied with a microbrush for 20 s. Read More

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Effect of laser irradiation on bond strength between zirconia and resin cement or veneer ceramic: A systematic review and meta-analysis.

J Indian Prosthodont Soc 2021 Apr-Jun;21(2):125-137

Department of Surgery and Integrated Clinic, Division of Periodontics, Group for the Research and Study of Laser in Dentistry, Aracatuba Dental School, Sao Paulo State University (UNESP), Sao Paulo, Brazil.

Aim: This systematic review with meta-analysis aimed to evaluate the effect of the laser treatment on bond strength between Y-TZP and the resin cement or with the veneering ceramic, and the effect on the alteration of the Y-TZP surface roughness.

Settings And Design: Systematic review and meta analysis following PROSPERO guidelines.

Materials And Methods: A comprehensive review was performed up to September 2020 on four databases (PubMed/MEDLINE, Embase, Scopus, and Cochrane Library), using the combination of keywords: "laser AND zirconia AND surface treatment AND bond strength". Read More

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Bond strength of metal brackets to feldspathic ceramic treated with different surface conditioning methods: an in vitro study.

Eur Oral Res 2021 Jan;55(1):1-7

Jacksonville University, Brooks Rehabilitation College of Healthcare Sciences, School of Orthodontics,Jacksonville, FL,USA.

Purpose: To compare MEP which is originally manufactured for increasing bond strength between organic resins and ceramic with conventional surface treatment methods in preparation of leucite-reinforced FC surfaces regarding shear bond strength (SBS) of stainless steel brackets and the mode of bond failure.

Materials And Methods: Forty specimens that were fabricated from FC material and glazed were randomly assigned to four surface conditioning methods: (1) CoJet Sand; (2) MEP; (3) HF acid etching followed by silane coupling agent; (4) Diamond bur followed by silane coupling agent. The SBS was determined using universal testing machine. Read More

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January 2021

Extract of Propolis on Resin-Modified Glass Ionomer Cement: Effect on Mechanical and Antimicrobial Properties and Dentin Bonding Strength.

Int J Biomater 2021 12;2021:5597837. Epub 2021 Apr 12.

Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran 1983963113, Iran.

This study assessed the effect of addition of aqueous extract of propolis in different concentrations on the mechanical and antimicrobial properties of resin-modified glass ionomer cement (RMGIC). In this in vitro study, powder of Fuji II LC RMGIC was mixed with 25% and 50% aqueous extracts of propolis. Samples ( = 15 for shear bond strength,  = 5 for flexural strength, and  = 20 for the antibacterial activity test) were fabricated using this mixture. Read More

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Effects of laser modalities on shear bond strengths of composite superstructure to zirconia and PEEK infrastructures: an in vitro study.

Odontology 2021 May 1. Epub 2021 May 1.

Departments of Prosthodontics, Sivas Cumhuriyet University, Sivas, Turkey.

In the last decade, demand for metal-free esthetic restorations has grown considerably due to the development of materials to fulfill the need for an esthetic prosthesis. We examined the effects of erbium-doped yttrium aluminum garnet (Er:YAG), neodymium-doped yttrium aluminum garnet (Nd:YAG), and potassium titanyl phosphate (KTP) laser applications on the shear bond strength (SBS) of nanohybrid composite superstructures to zirconia and PEEK infrastructures. Zirconia and PEEK specimens were prepared with CAD/CAM technology in accordance with ISO 11405 standards. Read More

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Quantitative interpretation of cell rolling velocity distribution.

Biophys J 2021 Apr 29. Epub 2021 Apr 29.

Department of Chemistry, The University of British Columbia, Kelowna, British Columbia, Canada; Biochemistry and Molecular Biology, The University of British Columbia, Kelowna, British Columbia, Canada. Electronic address:

Leukocyte rolling adhesion, facilitated by selectin-mediated interactions, is a highly dynamic process in which cells roll along the endothelial surface of blood vessel walls to reach the site of infection. The most common approach to investigate cell-substrate adhesion is to analyze the cell rolling velocity in response to shear stress changes. It is assumed that changes in rolling velocity indicate changes in adhesion strength. Read More

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Detection of the hybrid layer biodegradation initiation factor with a scanning electron microscope.

Microsc Res Tech 2021 Apr 30. Epub 2021 Apr 30.

Department of Prosthodontics, School of Dentistry, Ege University, Izmir, Turkey.

The purpose of this study was to elucidate the origin of initiation of hybrid layer biodegradation. Ninety caries-free human third molars were divided into three surface groups: enamel, dentin, and NaOCl-treated dentin. (n = 30/group) Each group was divided into three subgroups (n = 10/group) of luting resin materials with etch-and-rinse; self-etch and self-adhesive systems. Read More

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The Effect of Er:YAG Laser on a Shear Bond Strength Value of Orthodontic Brackets to Enamel-A Preliminary Study.

Materials (Basel) 2021 Apr 21;14(9). Epub 2021 Apr 21.

Department of Pediatric Dentistry and Preclinical Dentistry, Wrocław Medical University, Krakowska st. 26, 50-425 Wrocław, Poland.

We sought to evaluate the effects of Er:YAG laser (LightTouch, LightInstruments, Israel) conditioning on enamel roughness and shear bond strength of orthodontic brackets on enamel. Eighteen human molars (n = 9) and premolars (n = 9), were divided into 3 groups depending on the enamel conditioning method; Er:YAG laser (G1, n = 6), conventional etching with 37% orthophosphoric acid (G2, n = 6), Er:YAG laser combined with conventional etching (G3, n = 6). Er:YAG laser parameters were as follows: energy: 100 mJ, frequency: 10 Hz, exposure time: 10 s, applicator diameter: 600 μm, fluence: 35. Read More

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Effect of Sanding and Plasma Treatment of 3D-Printed Parts on Bonding to Wood with PVAc Adhesive.

Polymers (Basel) 2021 Apr 9;13(8). Epub 2021 Apr 9.

Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia.

Additive manufacturing is becoming increasingly important for manufacturing end products, not just prototyping. However, the size of 3D-printed products is limited due to available printer sizes and other technological limitations. For example, making furniture from 3D-printed parts and wooden elements requires adequate adhesive joints. Read More

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Effects of Copper Surface Oxidation and Reduction on Shear-Bond Strength Using Functional Monomers.

Materials (Basel) 2021 Apr 2;14(7). Epub 2021 Apr 2.

Department of Fixed Prosthodontics, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.

This study was conducted to clarify the influence of the copper surface oxidation and reduction on the shear-bond strength with functional monomers. Unheated copper specimens (UH; = 88) were wet-ground. Three-quarters of the UH were then heated (HT). Read More

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Effect of Protein-Based Treatment on Chemical Composition, Hardness and Bond Strength of Remineralized Enamel.

Braz Dent J 2021 Jan-Feb;32(1):85-90

Department of Restorative Dentistry, School of Dentistry, UNOPAR - Universidade Norte do Paraná, Londrina, PR, Brazil.

This study evaluated the chemical composition and microhardness of human enamel treated with an Enamel Matrix Derivative (EMD) solution, and the bond strength between composite resin and this enamel. Thirty human enamel samples were randomly divided into three groups: Untouched Enamel (UE), Demineralized Enamel (DE) and Demineralized Enamel Treated with EMD (ET). DE and ET groups were subjected to acid challenge and ET treated with EMD (EMD was directly applied over conditioned enamel and left for 15 min). Read More

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Evaluation of the effects of two different indirect bonding methods on strength of the brackets in mandibular model of severe anterior crowding.

Microsc Res Tech 2021 Apr 29. Epub 2021 Apr 29.

Department of Orthodontics, Ankara Yıldırım Beyazit University Faculty of Dentistry, Ankara, Turkey.

An indirect bonding method was developed to solve the problems likely to be encountered during proper positioning of the brackets. The aim of this study is to compare two different indirect bonding methods on the bond strength of the brackets. A 160 extracted human lower incisors were assigned into two groups. Read More

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Synergistic effect of graphene oxide/calcium phosphate nanofiller in a dentin adhesive on its dentin bond integrity and degree of conversion. A scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared, micro-Raman, and bond strength study.

Microsc Res Tech 2021 Apr 29. Epub 2021 Apr 29.

Department of Prosthetic Dental Science, College of Dentistry, King Saud University; Research Chair for Biological Research in Dental Health, Riyadh, Saudi Arabia.

The objective was to formulate and analyze a dentin adhesive incorporated with graphene oxide (GO) nanoparticle and calcium phosphate (CaP) composite. Methods comprising of scanning electron microscopy (SEM)-energy dispersive X-ray spectroscopy (EDX), micro-Raman spectroscopy, shear bond strength (SBS), and Fourier transform infrared (FTIR) spectroscopy were used to characterize nanoparticle composite, dentin bond toughness, degree of conversion (DC), and adhesive-dentin interaction. Postsynthesis of GO nanoparticles, they were functionalized with CaP using standard process. Read More

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Failure load and shear bond strength of indirect materials bonded to enamel after aging.

Gen Dent 2021 May-Jun;69(3):24-29

This study evaluated the failure load and the shear bond strength of 4 block materials indicated for computer-aided design/computer-aided manufacturing (CAD/CAM) of dental veneers: lithium disilicate, feldspathic ceramic, polymer-infiltrated ceramic, and nanohybrid composite. The tested hypothesis was that the material that combined an elastic modulus similar to that of enamel with the highest bond strength values would present the highest failure load. From prefabricated CAD/CAM blocks, disc-shaped specimens (6. Read More

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Yielding and resolidification of colloidal gels under constant stress.

J Phys Condens Matter 2021 Apr 26. Epub 2021 Apr 26.

IESL, Foundation for Research and Technology, PO Box 1527, 711 10 Heraklion, Crete, Heraklion, Crete, 71110, GREECE.

We examine the macroscopic deformation of a colloidal depletion gel subjected to a step shear stress. Three regimes are identified depending on the magnitude of the applied stress: (i) For stresses below yield stress, the gel undergoes a weak creep in which the bulk deformation growths sublinearly with time similar to crystalline and amorphous solids. For stresses above yield stress, when the bulk deformation exceeds approximately the bond length, the sublinear increase of deformation turns into a superlinear growth which signals the onset of non-linear rearrangements and yielding of the gel. Read More

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Bonding to zirconia: Effects of translucency and cusp inclinations using an experimental methodology.

J Prosthodont Res 2021 Apr 23. Epub 2021 Apr 23.

School and Hospital of Stomatology, Fujian Medical University; Fujian Key Laboratory of Oral Diseases, Fujian Province, P. R.

Purpose: To investigate the effects of translucency and cusp inclination on the micro-shear bond strength (µSBS) of zirconia to self-adhesive resin cement (SARC).

Methods: Sixty U-shaped zirconia specimens with 1.0 mm thickness consisting of three planes (0°, 20°, and 30°) simulating different cusp inclinations were fabricated from zirconia blocks of high, moderate, and low translucency (n=20). Read More

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The effect of different ceramic surface treatments on the repair bond strength of resin composite to lithium disilicate ceramic.

Dent Mater J 2021 Apr 22. Epub 2021 Apr 22.

Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.

This study aimed to evaluate the bonding abilities and long-term durability of different repair agents when applied to lithium disilicate ceramics (LDS). Blocks of IPS e.max CAD were prepared and divided into four groups according to the surface treatment: Monobond Etch & Prime (ME), K-etchant GEL+Clearfil Universal Bond (UB), Bondmer Lightless (BL), and K-etchant GEL+G-Multi Primer (GMP). Read More

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Effect of Different Light-Curing Modes on Bond Strength of Ceramic Laminate Veneers.

Int J Prosthodont 2021 Mar-Apr;34(2):221-228

Purpose: To investigate whether high-level irradiance and short light exposure times with light-emitting diode (LED) curing units could provide bond strength comparable to halogen lights for ceramic laminate veneers (CLVs).

Materials And Methods: A total of 160 extracted human maxillary central incisors were prepared to receive CLVs (lithium disilicate) in shades A1 and A3.5. Read More

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Effect of argon plasma on repair bond strength using nanofilled and microhybrid composites.

J Esthet Restor Dent 2021 Apr 21. Epub 2021 Apr 21.

Dental Materials Division, Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.

Objectives: To evaluate the effect of atmospheric pressure plasma (PLA), sandblasting (SAN), silanization (SIL) and hydrophobic bonding resin (HBR) on the micro-shear bond strength (MSBS) of fresh nanofilled (NF) or microhybrid (MH) composites to water-aged nanofilled composite.

Materials And Methods: NF plates were fabricated and stored in distilled water for 4 months. The aged plates were assigned to the groups (n = 6): 1- untreated; 2- SAN + SIL + HBR; 3- HBR; 4- PLA + HBR; 5- SAN + HBR; 6- SAN + PLA + HBR; and 7- PLA. Read More

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Relevance of hydrogen bonded associates to the transport properties and nanoscale dynamics of liquid and supercooled 2-propanol.

Phys Chem Chem Phys 2021 Mar 19;23(12):7220-7232. Epub 2021 Mar 19.

Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

2-Propanol was investigated, in both the liquid and supercooled states, as a model system to study how hydrogen bonds affect the structural relaxation and the dynamics of mesoscale structures, of approximately several Ångstroms, employing static and quasi-elastic neutron scattering and molecular dynamics simulation. Dynamic neutron scattering measurements were performed over an exchanged wave-vector range encompassing the pre-peak, indicative of the presence of H-bonding associates, and the main peak. The dynamics observed at the pre-peak is associated with the formation and disaggregation of the H-bonded associates and is measured to be at least one order of magnitude slower than the dynamics at the main peak, which is identified as the structural relaxation. Read More

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Effect of Root Canal Filling Materials and Pretreatment with Solvents on the Shear Bond Strength of Composite Resin with Primary Tooth Dentin.

Biomed Res Int 2021 2;2021:5534294. Epub 2021 Apr 2.

Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.

Aim: Root canal filling materials have the tendency to inhibit adhesion of resin-based composites. This study was aimed at evaluating the effect of root canal filling materials and their solvents on the shear bond strength (SBS) of resin composite with the primary tooth dentin.

Methods And Materials: Seventy-two intact anterior primary teeth were selected. Read More

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Characterization of a novel enamel sealer for bioactive remineralization of white spot lesions.

J Dent 2021 Apr 12:103663. Epub 2021 Apr 12.

Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Alfarabi Private Dental College, Jeddah, 23643, Saudi Arabia. Electronic address:

Objectives: 45S5 Bioglass is bioactive glass capable of releasing ions that can interact with dental hard tissues. The current study aimed at examining the effectiveness of 45S5 Bioglass in remineralizing enamel white spot lesion (WSL) as well as its effect on the bond strength of orthodontic brackets bonded to demineralized enamel.

Materials And Methods: WSLs were induced in in the buccal surfaces of 135 human extracted teeth by storage in acid solution pH 4. Read More

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Bond Integrity of Resin-modified Glass Ionomer to Dentin Conditioned Using Photodynamic Therapy and Low-level Laser Therapy: An Study.

J Contemp Dent Pract 2020 Nov 1;21(11):1229-1232. Epub 2020 Nov 1.

Department of Restorative Dental Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia, Phone: +966 1 8064701, e-mail:

Aim: The aim of the study was to assess the conditioning efficacy of photodynamic therapy (PDT) and Er,Cr:YSGG laser (ECYL) to dentin compared with conventional regime bonded to resin-modified glass ionomer (RMGIC).

Materials And Methods: Forty mandibular teeth were cleaned, disinfected, and mounted vertically within the segments of polyvinyl pipes up to cementoenamel junction. The occlusal surfaces were flattened, and samples were divided into four groups according to conditioning protocols. Read More

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November 2020