2,333 results match your criteria bonded ceramic

Macromonomers as a Novel Way to Investigate and Tailor Silicon-Oxycarbide-Based Materials Obtained from Polymeric Preceramic Precursors.

Materials (Basel) 2021 Jul 2;14(13). Epub 2021 Jul 2.

Faculty of Materials Science and Ceramics, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland.

It has been shown that bifunctional monomers (D units), which are used to increase the carbon content in silicon oxycarbide precursors, can form volatile oligomers, thus affecting the amount of carbon available during the transition into the final material in the annealing process. Additionally, an uneven distribution of carbon-rich mers may lead to the formation of a free-carbon phase, instead of the incorporation of carbon atoms into the silicon matrix. In this study, a novel two-step approach was utilized. Read More

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[Conservative and simple rehabilitation to compensate posterior open bite: partial bonded restauration].

Orthod Fr 2021 Jun;92(2):181-194

Centre Hospitalier Universitaire de Nice, Pôle Odontologie, 4 avenue Reine Victoria, 06000 Nice, France, Université Côte d'Azur, UFR Odontologie, 24 avenue des Diables Bleus, 06357 Nice Cedex 04, France, MICORALIS EA 7354, Université Côte d'Azur, 24 avenue des Diables Bleus, 06357 Nice cedex 04, France.

Posterior open bite is a malocclusion characterized by the absence of vertical contacts between the occlusal surfaces of the posterior teeth of the opposing arches. It can be uni- or bilateral and involve one tooth or more. Several aetiologies of these posterior open bite have been described, including pathological eruptions, dento-maxillary dysmorphosis and temporo-mandibular dysfunctions. Read More

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Surface Coordination Interphase Stabilizes Solid-State Battery.

Angew Chem Int Ed Engl 2021 Jul 18. Epub 2021 Jul 18.

Shanghai Institute of Ceramics, Chinese Academy of Sciences, State Key Lab of High Performance Ceramics and Superfine microstructure, 1295 Dingxi Road, 200050, Shanghai, CHINA.

Solid-state electrolytes (SSEs) with high mechanical strength and incombustibility have great potential in completely addressing the safety issues of liquid batteries, but the poor interface contact between them and the electrodes hinders their practical applications. Here, coordination chemistry of nitrile groups based on succinonitrile (SCN) and polyacrylonitrile (PAN) is studied on the surface of Li 6.4 La 3 Zr 1. Read More

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Do Different Pretreatment Methods Influence the Microtensile Bond Strength of Composite Cements to Silicate Ceramic?

J Adhes Dent 2021 Jul;23(4):335-345

Purpose: The pretreatment of glass-ceramic before adhesive cementation can be performed with hydrofluoric acid (HF)/silanization (S) or with an ammonium polyfluoride-containing primer (APF). It can be modified by application of a silane-containing universal adhesive (UA) and/or additional silanization. The aim of this study was to evaluate the bond strength of composite cements to two different glass ceramics after different pretreatments and aging. Read More

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The Effect of Dentin Bonding and Material Thickness on the Flexural Properties of a Lithium-Disilicate Glass-Ceramic.

J Adhes Dent 2021 Jul;23(4):309-318

Purpose: Thanks to adhesive techniques and strengthened glass ceramics, ultrathin bonded occlusal veneers have been recently introduced. However, since a universally accepted thickness limit for ultrathin ceramics has yet to be established, their resistance to fracture needs to be better investigated. The purpose of this in vitro study was to evaluate the effect of dentin bonding on the flexural properties (ie, fracture load and flexural strength) of a lithium-disilicate (LD) glass ceramic when used in thicknesses equal to or less than the manufacturer's recommendations for occlusal restorations. Read More

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A Thorough Analysis of the Endocrown Restoration: A Literature Review.

J Contemp Dent Pract 2021 Apr 1;22(4):422-426. Epub 2021 Apr 1.

Department of Prosthodontics, National and Kapodistrian University of Athens, Athens, Greece.

Aim: The aim of this literature review is to determine whether endocrowns are a reliable alternative for endodontically treated teeth with extensive loss of tooth structure, the indications and contraindications of this restorative choice, the principles that should be followed for tooth preparation and which material is most appropriate for endocrown fabrication.

Background: Rehabilitation of endodontically treated teeth with severe coronal destruction has always been a challenge for the dental clinician. Until recently, the fabrication of a metal-ceramic or all-ceramic full-coverage crown along with a metal or glass fiber post has been the "gold standard" proving its efficacy via numerous clinical studies. Read More

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Comparison of Mechanical Properties of Chairside CAD/CAM Restorations Fabricated Using a Standardization Method.

Materials (Basel) 2021 Jun 6;14(11). Epub 2021 Jun 6.

Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea.

The aim of this in vitro study was to investigate the fracture resistance, fracture failure pattern, and fractography of four types of chairside computer-aided design/computer-aided manufacturing (CAD/CAM) restoration materials in teeth and titanium abutments fabricated using a standardization method. An artificial mandibular left first premolar prepared for all-ceramic crown restoration was scanned. Forty extracted mandibular molars and cylindrical titanium specimens were milled into a standardized shape. Read More

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UV-Mediated Photofunctionalization of Indirect Restorative Materials Enhances Bonding to a Resin-Based Luting Agent.

Biomed Res Int 2021 29;2021:9987860. Epub 2021 May 29.

Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.

Purpose: The potential of UV-mediated photofunctionalization to enhance the resin-based luting agent bonding performance to aged materials was investigated.

Methods: Sixty samples of each material were prepared. Yttria-stabilized zirconia (YZr) and Pd-Au alloy (Pd-Au) plates were fabricated and sandblasted. Read More

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Comparison of Fracture Strengths among different Commonly Placed Anterior Esthetic Restorations for Primary Dentition: An in vitro study.

J Clin Pediatr Dent 2021 Jul;45(3):171-176

The purpose of this study was to determine and compare the shear force (N) required to fracture or dislodge an all-ceramic zirconia-based crown using different luting cement with those of polycarbonate crown and strip crown for the primary anterior teeth in vitro.

Study Design: Four groups of esthetic restoration for primary anterior teeth were tested for fracture strength: 1) Fifteen all-ceramic zirconia-based crowns cemented with glass ionomer cement, 2) Fifteen all-ceramic zirconia-based crowns bonded with a self-adhesive resin cement, 3) Fifteen polycarbonate crowns cemented with a polymer reinforced zinc-oxide eugenol and 4) Fifteen resin strip crowns. All restorations were placed and cemented on reproductions of dies in an independent laboratory at Delhi, India. Read More

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Effect of the different debonding strength of metal and ceramic brackets on the degree of enamel microcrack healing.

Dental Press J Orthod 2021 25;26(3):e2119177. Epub 2021 Jun 25.

Naresuan University, Department of Restorative Dentistry, Section of Prosthodontics (Phitsanulok, Thailand).

Objective: This study aims to determine shear debonding strength of metal and ceramic brackets, and the degree of enamel crack healing.

Material And Methods: Extracted human maxillary premolars were flattened on the buccal surface, and randomly separated into five groups (n = 15). In control groups (groups 1 and 2), metal and ceramic brackets were bonded on flat polished enamel, while in experimental groups (groups 3 and 4), metal and ceramic brackets were bonded on the surface with boundary where corner cracks were created. Read More

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The influence of FRC base and bonded CAD/CAM resin composite endocrowns on fatigue behavior of cracked endodontically-treated molars.

J Mech Behav Biomed Mater 2021 09 15;121:104647. Epub 2021 Jun 15.

Division of Cariology and Endodontology, School of Dentistry, University of Geneva, Geneva, Switzerland.

Cracked endodontically treated molars (ETMs) are commonly treated with full crowns. Less invasive techniques could include fiber-reinforced composite (FRC) base and adhesively bonded endocrowns. The purpose of this study was to assess the fatigue resistance of ETMs restored with CAD/CAM resin composite endocrowns and reinforced with different FRC bases. Read More

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September 2021

Effect of different resin removal methods on enamel after metal and ceramic bracket debonding : An in vitro micro-computed tomography study.

J Orofac Orthop 2021 Jun 24. Epub 2021 Jun 24.

Faculty of Dentistry, Department of Oral and Maxillofacial Radiology, Ankara University, Ankara, Turkey.

Purpose: The aim of this study was to conduct an in vitro evaluation of the effects of different adhesive debonding and polishing techniques performed after metal and ceramic bracket removal on enamel using micro-computed tomography (micro-CT).

Methods: This study was performed on 42 extracted maxillary first premolars divided into 2 main groups and 6 subgroups as follows: metal (group 1) or ceramic (group 2) brackets were bonded to the teeth, then, after debonding, one of three different methods was used to remove the residual adhesive: tungsten carbide burs with pumice (A), fiber-reinforced composite burs and polishing paste (B), or Sof-Lex discs (C; 3M Dental, St Paul, MN, USA). The samples were evaluated by micro-CT before bracket bonding (T0) and after resin removal (T1). Read More

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Shear Bond Strength of Zirconia Ceramic to Four Different Core Materials, An Study.

J Dent (Shiraz) 2021 Jun;22(2):138-143

Post Graduate Student of Prosthodontics, Dept. of Prosthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Statement Of The Problem: Different materials can be used to reconstruct the core foundation in all-ceramic restorations. Bond strength of the core material to zirconia is an important factor in long-term restoration success.

Purpose: The aim of this study was to assess shear bond strength (SBS) of zirconia to four different core materials. Read More

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Alumina particle air-abrasion and aging effects: Fatigue behavior of CAD/CAM resin composite crowns and flexural strength evaluations.

J Mech Behav Biomed Mater 2021 09 19;121:104592. Epub 2021 May 19.

MSciD and PhD Post-Graduate Program in Oral Science, Prosthetic Dentistry Unit, Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil. Electronic address:

The aim of this study was to characterize the flexural strength and elastic modulus of CAD/CAM resin composite material and to evaluate the influence of different surface treatments and storage conditions on the fatigue behavior of bonded composite crowns. Bars (flexural strength, n= 30; elastic modulus, n= 5) (1.2 × 4 × 12 mm) were produced for three-point bending test and CAD/CAM milled crowns (n= 5) (thickness= 1 mm) adhesively cemented to an epoxy resin substrate for fatigue tests. Read More

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September 2021

Compressive strength of lithium disilicate inlay cementation on three different composite resins.

J Dent Sci 2021 Jul 12;16(3):994-1000. Epub 2021 Feb 12.

Department of Stomatology, Taichung Veteran General Hospital, Taichung, Taiwan.

Background/purpose: Ceramic restorations have been increasingly applied over recent years. But the performance of cement is still unknown after cementation. This study was aimed to compare the compressive strength and the performances of three different types of composite resin after lithium disilicate inlay cementation. Read More

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Effect of CAD-CAM ceramic materials on the color match of veneer restorations.

J Prosthet Dent 2021 Jun 11. Epub 2021 Jun 11.

Professor, Department of Prosthodontics, Dalian Stomatological Hospital, Dalian, PR China. Electronic address:

Statement Of Problem: With the different translucency levels and types of computer-aided design and computer-aided manufacturing (CAD-CAM) ceramic materials, choosing the most appropriate CAD-CAM ceramic materials to better reproduce the color appearance of natural teeth can be challenging.

Purpose: The purpose of this in vitro study was to analyze the color differences between natural teeth and milled veneers fabricated with the different types of CAD-CAM ceramic materials.

Material And Methods: Ten extracted maxillary central incisor teeth with the A2 shade in the body region were prepared for ceramic veneers. Read More

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Fracture resistance of maxillary premolars restored with different endocrown designs and materials after artificial ageing.

J Prosthodont Res 2021 Jun 10. Epub 2021 Jun 10.

Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel.

Purpose: To evaluate the effect of three different designs and two monolithic ceramic materials on the durability and fracture resistance of endocrowns on maxillary first premolars, in comparison to post-and-core crowns.

Methods: Fifty-six maxillary premolars were endodontically treated and shortened to a level of 2 mm from the cervical line, and randomly categorized into six endocrown groups and post-and-core crown control group (n=8); E1; endocrowns with flat occlusal table (without ferrule), E2; endocrowns with 1.5 mm circumferential ferrule, E3; endocrowns with 1. Read More

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Enhanced thermoelectric performance in polymorphic heavily Co-doped CuSnS through carrier compensation by Sb substitution.

Sci Technol Adv Mater 2021 May 28;22(1):363-372. Epub 2021 May 28.

Nagoya Industrial Science Research Institute, Nagoya, Japan.

Heavily acceptor-doped CuSnS (CTS) shows promisingly large power factor () due to its rather high electrical conductivity () which causes a modest with a high electronic thermal conductivity ( ). In the present work, a strategy of carrier compensation through Sb-doping at the Sn site in CuSnCoS was investigated, aiming at tailoring electrical and phonon transport properties simultaneously. Rietveld analysis suggested a complex polymorphic microstructure in which the cation-(semi)ordered tetragonal phase becomes dominant over the coherently bonded cation-disordered cubic phase, as is preliminarily revealed using TEM observation, upon Sb-doping and Sb would substitute Sn preferentially in the tetragonal structure. Read More

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In-lab simulation of CAD/CAM milling of lithium disilicate glass-ceramic specimens: Effect on the fatigue behavior of the bonded ceramic.

J Mech Behav Biomed Mater 2021 09 21;121:104604. Epub 2021 May 21.

MSciD and PhD Graduate Programs in Oral Science - Prosthodontic Units, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil. Electronic address:

The aim of this study was to evaluate the effect of in-lab simulation procedures performed on a lithium disilicate ceramic luted to a dentin-analogue material regarding the fatigue performance and topographic changes. Lithium disilicate ceramic (IPS e.max CAD) discs (Ø = 13. Read More

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September 2021

Constructing core-shell structured [email protected] boosts piezoelectric activity and cell response of polymer scaffolds.

Mater Sci Eng C Mater Biol Appl 2021 Jul 24;126:112129. Epub 2021 Apr 24.

Institute of Bioadditive Manufacturing, Jiangxi University of Science and Technology, Nanchang 330013, China; Shenzhen Institute of Information Technology, Shenzhen 518172, China; State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China. Electronic address:

Piezoelectric composites have shown great potential in constructing electrical microenvironment for bone healing since their integration of polymer flexibility and ceramic piezoelectric coefficient. Herein, core-shell structured [email protected] ([email protected]) hybrid nanoparticles were prepared by in situ oxidative self-polymerization and template carbonization. Then the [email protected] was introduced into polyvinylidene fluoride (PVDF) scaffolds manufactured by selective laser sintering. Read More

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In vitro evaluation of the influence of titanium nitride coating on the retention force between components of two-part abutments.

BMC Oral Health 2021 06 2;21(1):285. Epub 2021 Jun 2.

, Lilienthaler Heerstr. 261, 28357, Bremen, Germany.

Background: Two-part abutments are typically made up of a base composed of titanium and a ceramic build-up. The long-term outcomes are affected by the mechanical durability. The purpose of the present investigation was to evaluate and compare the retention force of two-part abutment systems with titanium or titanium nitride bases-as fixed with zirconia components and with various surface treatments. Read More

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Covalently bonded surface functional groups on carbon nanotubes: from molecular modeling to practical applications.

Nanoscale 2021 Jun 1;13(22):10152-10166. Epub 2021 Jun 1.

Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland.

The aim of this work was to investigate how chemical functionalization affects the electronic properties of multi-walled carbon nanotubes, altering the electrophoretic deposition process: a method of choice for the fabrication of high quality, all-carbon nanotube (CNT) layers. Wet chemistry methods were applied to modify the surfaces of CNTs by insertion of various oxygen- and nitrogen-containing groups. Transmission electron microscopy revealed no significant changes in the material morphology, while X-ray photoelectron spectroscopy and Raman spectroscopy showed that changes in the chemical composition did not translate to the changes in the structure. Read More

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Cold Atmospheric Plasma Improves Shear Bond Strength of Veneering Composite to Zirconia.

Dent J (Basel) 2021 May 21;9(6). Epub 2021 May 21.

Department of Prosthodontics, School of Dentistry, Faculty of Health, Witten/Herdecke University, 58455 Witten, Germany.

Chipping of veneering is the most common clinical complication for zirconia restorations. Veneering composite could be a promising alternative to renew restorations. Zirconia discs (3-YSZ) were prepared with varying surface treatments and bonded to indirect composite as follows: air abrasion and Scotchbond Universal (A/SU); air abrasion and Clearfil Ceramic Primer (A/C); air abrasion and MKZ Primer (A/M); air abrasion and Monobond Plus (A/MP); silica-coating and Scotchbond Universal (S/SU); air abrasion (AP/SU), additional cold atmospheric plasma treatment, and Scotchbond Universal. Read More

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Shear Bond Strength of Composite Cement to Lithium-Disilicate Glass-coated Zirconia Versus Alumina Air-abraded Zirconia.

J Adhes Dent 2021 Jun;23(3):267-275

Purpose: To compare the shear bond strength of composite cement to lithium-disilicate glass-ceramic coated zirconia vs to alumina air-abraded zirconia and to analyze the residual stresses on both of lithium-disilicate glass-ceramic coated zirconia vs alumina air-abraded zirconia specimens.

Materials And Methods: One hundred eighty zirconia disks (diameters 10 mm and 5 mm, 4.5 mm thick) were divided into two groups: lithium-disilicate glass-ceramic coating followed by hydrofluoric acid etching and Monobond N Primer (LiDi) or alumina air-abrasion (AA). Read More

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Lithium di silicate ceramic surface treated with Er,Cr:YSGG and other conditioning regimes bonded to orthodontic bracket.

Ali Alqerban

Saudi Dent J 2021 May 4;33(4):188-193. Epub 2019 Dec 4.

Department of Preventive Dental Sciences College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia.

Aim: To assess bond integrity and modes of failure of metallic brackets to lithium disilicate ceramics (LDC) conditioned with Er,Cr:YSGG laser (ECL).

Material And Methods: Sixty LDC were arbitrarily allocated into six groups (n = 15) according to the type of ceramic surface conditioning treatment. Group 1 surface treated with silane (S) only, group 2 surface etched with hydrofluoric acid (HF)+ S, group 3 surface conditioned with HF+ ultrasonic bath (UB)+ S, group 4 sand blasting (SB) of glass ceramic surface with 50 µm AlO, group 5 surface conditioned with self-etch ceramic primer (SECP) and in group 6 surface treated with ECL + S. Read More

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Surface treatments on CAD/CAM glass-ceramics: Influence on roughness, topography, and bond strength.

J Esthet Restor Dent 2021 07 15;33(5):739-749. Epub 2021 May 15.

Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.

Objective: To evaluate the influence of surface treatment on roughness (SA), topography, and shear bond strength (SBS) of computer-aided designer and manufacture (CAD/CAM) zirconia-reinforced lithium silicate (ZLS) and feldspathic (FEL) glass-ceramics.

Materials And Methods: FEL and ZLS specimens were submitted to 5% or 10% hydrofluoric acid (HF) or self-etching ceramic primer (MEP) and different application times (20, 40, and 60 s), or to sandblasting (Control, 20 s). Resin cement cylinders were bonded to the specimens and tested in shear (n = 10) after 24 h and 16-months of water storage. Read More

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Resin Bonding of a Lithium-Disilicate Crown Using a Ligated Rubber Dam: A 2-Year Case Report.

Compend Contin Educ Dent 2021 Apr;42(4):188-191

Professor, Department of Restorative Sciences, Dental College of Georgia, Augusta University, Augusta, Georgia.

Enduring glass-ceramic restorations greatly depend on the quality of adhesion of the crown to enamel and dentin. Proper isolation is vital to the success of bonded ceramic restorations. The rubber dam has long been considered the primary method of preventing contamination of the operating field, a crucial requisite for adhesion. Read More

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Impact of resin composite cement on color of computer-aided design/computer-aided manufacturing ceramics.

J Esthet Restor Dent 2021 07 5;33(5):786-794. Epub 2021 May 5.

Department of Prosthetic Dentistry, LMU Munich, Munich, Germany.

Objective: To analyze the impact of the color of a resin composite cement (RCC) on the optical properties of different computer-aided design and computer-aided manufacturing (CAD/CAM) ceramics.

Materials And Methods: Specimens (N = 220, thickness: 0.9 ± 0. Read More

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Comparison of tensile bond strength of new and rebonded Symetri Clear™ ceramic brackets with Transbond™ XT or BluGloo™, with or without surface treatment: An in vitro study.

Int Orthod 2021 Jun 28;19(2):252-258. Epub 2021 Apr 28.

LSU Health Sciences Center, Department of Orthodontics, 1100 Florida Avenue, 70119 New Orleans, LA, USA.

Objectives: This study sought to determine the bond strength of the Symetri Clear™ bracket after rebonding (reused) for a second and third time.

Materials And Methods: Symetri Clear™ mandibular incisor brackets were bonded to bovine incisors and divided into six experimental groups. Two groups underwent tensile bond strength testing, and the remaining four groups were debonded using the manufacturer's recommended plier. Read More

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Organobentonites Modified with Poly(Acrylic Acid) and Its Sodium Salt for Foundry Applications.

Materials (Basel) 2021 Apr 13;14(8). Epub 2021 Apr 13.

Faculty of Foundry Engineering, AGH-University of Science and Technology, Reymonta 23, 30-059 Krakow, Poland.

The article aims to verify the possibility of obtaining an organic-inorganic material acting as both a binder and a lustrous carbon carrier in bentonite-bonded molding sands. Due to the wide industrial application, organoclays can be considered as innovative materials supporting the foundry technology in meeting environmental requirements. In this study, the organic modification of montmorillonite in calcium bentonite (SN) was performed by poly(acrylic acid) (PAA) and its sodium salt (PAA/Na). Read More

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