4,101 results match your criteria Dental Materials [Journal]


Investigation of five α-hydroxy acids for enamel and dentin etching: Demineralization depth, resin adhesion and dentin enzymatic activity.

Dent Mater 2019 Apr 8. Epub 2019 Apr 8.

Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, UIC, Chicago, IL, USA. Electronic address:

Objectives: Surface conditioning of enamel and dentin is a key step during adhesive restorative procedures and strategies. The aim of this study was to investigate the effectiveness of five α-hydroxy-acids (AHAs) as enamel and dentin surface etchants.

Methods: Enamel and dentin specimens were prepared from human molars to determine the depth of demineralization by optical profilometry (Δz), the resin bond strength to enamel and dentin (μTBS), the micro-permeability of dentin-resin interfaces, and the gelatinolytic activity of dentin matrix induced by AHAs [glycolic (GA), lactic (LA), citric (CA), malic (MI) and tartaric (TA)] and controls [phosphoric (PA) and maleic (MA)]. Read More

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http://dx.doi.org/10.1016/j.dental.2019.03.005DOI Listing

In vitro biofilm formation on different ceramic biomaterial surfaces: Coating with two bactericidal glasses.

Dent Mater 2019 Apr 8. Epub 2019 Apr 8.

ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense, Madrid, Spain. Electronic address:

Objectives: To compare biofilm formation on the surface of different ceramic biomaterials to be used in implant dentistry.

Methods: In vitro biofilm formation was investigated from mixtures of standard reference strains of Streptococcus oralis, Veillonella parvula, Actinomyces naeslundii, Fusobacterium nucleatum, Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis. Sterile ceramic calcium hydroxyapatite discs (HA) as control, sterile AlO/Ce-TZP nanocomposite sandblasted discs (material A1) and sterile AlO/Ce-TZP nanocomposite sandblasted discs and coated with two types of antimicrobial glasses (materials A2 and A3) were used. Read More

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http://dx.doi.org/10.1016/j.dental.2019.03.003DOI Listing

A comparison of lithium-substituted phosphate and borate bioactive glasses for mineralised tissue repair.

Dent Mater 2019 Apr 8. Epub 2019 Apr 8.

Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK. Electronic address:

Objectives: Wnt/β-catenin signalling plays important roles in regeneration, particularly in hard tissues such as bone and teeth, and can be regulated by small molecule antagonists of glycogen synthase kinase 3 (GSK3); however, small molecules can be difficult to deliver clinically. Lithium (Li) is also a GSK3 antagonist and can be incorporated into bioactive glasses (BG), which can be used clinically in dental and bone repair applications and tuned to quickly release their constituent ions.

Methods: Here, we created phosphate (P)- and borate (B)-based BG that also contained Li (LiPBG and LiBBG) and examined their ion release kinetics and the toxicity of their dissolution ions on mouse 17IA4 dental pulp cells. Read More

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http://dx.doi.org/10.1016/j.dental.2019.03.008DOI Listing
April 2019
1 Read

Antibacterial resin-based composite containing chlorhexidine for dental applications.

Dent Mater 2019 Apr 4. Epub 2019 Apr 4.

Instituto de Pesquisas Energéticas e Nucleares IPEN-CNEN/SP, 05508-000, São Paulo, Brazil.

Objeticve: The aim of this study was to develop a composite material with antibacterial activity using MMT loaded with clorhexidine (CHX). For that it was used a BisGMA/TEGDMA matrix and added low concentration of MMT/CHX. The aim was to evaluate the drug release capacity of MMT, and not to provide reinforcement. Read More

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http://dx.doi.org/10.1016/j.dental.2019.03.004DOI Listing

Preparation of silica-poly(methyl methacrylate) composite with a nanoscale dual-network structure and hardness comparable to human enamel.

Dent Mater 2019 Apr 4. Epub 2019 Apr 4.

Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Kitakyushu-shi, Fukuoka 803-8580, Japan.

Objective: This study aims to prepare an organic-inorganic composite with a nanoscale dual-network structure composed of a ceramic skeleton and infiltrated resin to mimic the mechanical properties of human enamel.

Methods: A porous silica block was obtained by sintering a green body composed of SiO nanoparticles and poly(vinyl alcohol) organic binder. Methyl methacrylate monomers were infiltrated into the porous silica block and thermally polymerized to form poly(methyl methacrylate) (PMMA). Read More

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http://dx.doi.org/10.1016/j.dental.2019.03.006DOI Listing

Additive manufacturing of ceramics for dental applications: A review.

Dent Mater 2019 Apr 1. Epub 2019 Apr 1.

CiiEM - Escola Superior de Saúde Egas Moniz, Monte da Caparica, Portugal; CQE - Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal. Electronic address:

Objective: The main goal of this review is to provide a detailed and comprehensive description of the published work from the past decade regarding AM of ceramic materials with possible applications in dentistry. The main printable materials and most common technologies are also addressed, underlining their advantages and main drawbacks.

Methods: Online databases (Web of knowledge, Science Direct, PubMed) were consulted on this topic. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.026DOI Listing
April 2019
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Deformation and retentive force following in vitro cyclic fatigue of cobalt-chrome and aryl ketone polymer (AKP) clasps.

Dent Mater 2019 Apr 1. Epub 2019 Apr 1.

School of Dentistry, University of Leeds, Clarendon Way, Leeds LS2 9LU, United Kingdom. Electronic address:

Objective: To compare the retention force of individual clasps made from cobalt chromium (CoCr) or new aryl ketone polymer (AKP) material, Ultaire™ AKP, following prolonged fatigue testing along ideal and non-ideal paths of removal and to assess 3D deformation of the active and passive clasp tips.

Methods: CoCr and AKP clasps were manufactured in their standard, respective processes, digitally scanned prior to testing, then cycled 15,000 times over an e.max analogue crown in artificial saliva. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.028DOI Listing

Masking ability of indirect restorative systems on tooth-colored resin substrates.

Dent Mater 2019 Mar 29. Epub 2019 Mar 29.

Post-graduate Program in Dentistry, Dental School, University of Passo Fundo, Brazil. Electronic address:

Objective: To evaluate the masking ability of different indirect restorative systems (IRS) on tooth-colored resin substrates.

Methods: A1-shaded specimens from 5 IRS (LDC-IPS e.max CAD; YZW-Zenostar Zr Translucent; PICN-Enamic; YLD-T-IPS e. Read More

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http://dx.doi.org/10.1016/j.dental.2019.03.001DOI Listing

Factors influencing development of residual stresses during crystallization firing in a novel lithium silicate glass-ceramic.

Dent Mater 2019 Mar 28. Epub 2019 Mar 28.

Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Zahnklinik 1 - Zahnerhaltung und Parodontologie, Forschungslabor für dentale Biomaterialien, Erlangen, Germany.

Objective: Development of residual stresses is a potential source of premature fractures in glassy materials, being of special interest in novel lithium silicate glass-ceramics that require a crystallization firing to achieve their final mechanical properties. The aim of this work was to assess the influence of various firing tray systems and the application of different cooling protocols on the development of residual stresses in Suprinity PC crowns. Their effect on the in vitro lifetime of the restorations was also studied. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641193005
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http://dx.doi.org/10.1016/j.dental.2019.03.002DOI Listing
March 2019
3 Reads

The effect of fusion sputtering surface treatment on microshear bond strength of zirconia and MDP-containing resin cement.

Dent Mater 2019 Mar 28. Epub 2019 Mar 28.

Faculty of Dentistry, Alexandria University, Alexandria, Egypt; Dental Biomaterials Department, Faculty of Dentistry, Alexandria University.

Purpose: The aim of this study is to evaluate the effect of fusion sputtering surface treatment on the microshear bond strength of zirconia and self-adhesive MDP-containing resin cement.

Materials: Thirty-six zirconia discs received one of the following treatments: fusion sputtering, airborne particle abrasion with 50-μm aluminum oxide particles, while as-sintered specimens served as a control. Four treated zirconia samples from each group were examined using 3D laser scanning microscope to assess the surface roughness and scanning electron microscope to study the surface topography. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.013DOI Listing

Influence of bioactive glass-coating of zirconia implant surfaces on human osteoblast behavior in vitro.

Dent Mater 2019 Mar 16. Epub 2019 Mar 16.

Division of Dental Materials and Engineering, Department of Reconstructive Dentistry, University Center for Dental Medicine, University of Basel, Basel, Switzerland.

Objective: The recently developed bioactive glass PC-XG3, which is suitable to coat zirconia implant surfaces with high adhesion strength may reduce the time of osseointegration and the marginal bone loss following implantation. The glass composition has been previously evaluated for cytotoxicity on fibroblast cells, and will now be used to evaluate the cell behavior of osteoblast cells.

Methods: Three different surface morphologies were created with PC-XG3 on zirconia discs. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.029DOI Listing

Relationship between Canal Enlargement and Fracture Load of Root Dentin Sections.

Dent Mater 2019 May 15;35(5):818-824. Epub 2019 Mar 15.

Department of Restorative Sciences, School of Dentistry, University of Minnesota, Moos Health Sciences Tower, 515 Delaware Street S.E., Minneapolis, MN, 55455, USA; Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota, Moos Health Sciences Tower, 515 Delaware Street S.E., Minneapolis, MN, 55455, USA.

Objective: To investigate the effect of endodontic instrumentation on fracture susceptibility of root dentin using experiments and stress analysis.

Methods: Root canals of lower premolars were enlarged with different tapers. After, teeth were cut into 2-mm sections. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.015DOI Listing
May 2019
1 Read

Effects of single species versus multispecies periodontal biofilms on the antibacterial efficacy of a novel bioactive Class-V nanocomposite.

Dent Mater 2019 Mar 13. Epub 2019 Mar 13.

Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA. Electronic address:

Objective: The objectives of this studywere to: (1) develop a novel bioactive nanocomposite for Class V restorations with subgingival margins to inhibit periodontal pathogens; and (2) investigate if the bioactive nanocomposite could inhibit multi-species periodontal biofilms with a potency as strong as that against single species biofilms.

Methods: Nanocomposite was fabricated using dimethylaminohexadecyl methacrylate (DMAHDM), 2-methacryloyloxyethyl phosphorylcholine (MPC) and nanoparticles of amorphous calcium phosphate (NACP). Biofilms with 1, 3, 6 and 9 species of periodontal pathogens were grown on the composites and tested for live/dead staining, colony-forming units (CFU), metabolic activity, and biofilm matrix polysaccharide production. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183135
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http://dx.doi.org/10.1016/j.dental.2019.02.030DOI Listing
March 2019
7 Reads

Chemical and biological properties of new sealant-use cement materials.

Dent Mater 2019 May 11;35(5):673-685. Epub 2019 Mar 11.

Division of Pediatric Dentistry, Department of Oral Growth and Development, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido, 061-0293, Japan.

Objectives: The aim of this study was to investigate the chemical and biological properties of newly developed bioactive cements, modified such that they are largely composed of calcium, phosphate and fluoride. We investigated whether newly developed bioactive cements have the potential to further protect surrounding hard tissue and enhance remineralization of demineralized tissue by additional ion release.

Methods: We developed four types of novel GIC based on Fuji VII, modified with phosphate and fluoride and calcium. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.014DOI Listing
May 2019
5 Reads

Long-term in vitro degradation behavior and biocompatibility of polycaprolactone/cobalt-substituted hydroxyapatite composite for bone tissue engineering.

Dent Mater 2019 May 8;35(5):751-762. Epub 2019 Mar 8.

Graduate Institute of Oral Science, Chung Shan Medical University, Taichung 40201, Taiwan; Chung Shan Medical University Hospital, Taichung 40201, Taiwan. Electronic address:

Objective: Currently, infections due to foreign-body reactions caused by bacteria or implant materials at the wound site are one of the major reasons for the failure of guided tissue regeneration (GTR) and guided bone regeneration (GBR) in clinical applications. The purpose of this study was to develop regeneration membranes with localized cobalt ion release to reduce infection and inflammation by polycaprolactone (PCL)/cobalt-substituted hydroxyapatite (CoHA).

Methods: The PCL composite membrane containing 20 wt% CoHA powders was prepared by solvent casting. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.023DOI Listing

Properties of hot-pressed lithium silicate glass-ceramics.

Dent Mater 2019 May 7;35(5):713-729. Epub 2019 Mar 7.

Department of Prosthodontics, Propaedeutic and Dental Materials, School of Dentistry, Kiel University, Germany.

Objectives: New lithium silicate/disilicate hot-pressed glass-ceramics are introduced into the dental market. It is known that the mechanical properties of this material depend on the microstructure, chemical composition, glass matrix, morphology of crystals, volume ratio crystal/glass, additive, and treatments. This contribution investigates how these factors affect the properties of the new generation of lithium silicate/disilicate hot-pressed glass-ceramics. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.027DOI Listing
May 2019
1 Read

Remineralization effects of conventional and experimental ion-releasing materials in chemically or bacterially-induced dentin caries lesions.

Dent Mater 2019 May 8;35(5):772-779. Epub 2019 Mar 8.

Departamento de Odontología, Facultad de Ciencias de la Salud, Universidad CEU-Cardenal Herrera, Valencia, Spain.

Objectives: The aim of this study was to evaluate the remineralization effects of conventional and experimental ion-releasing materials on different artificial dentin carious lesions.

Methods: Forty human dentin discs were submitted to different demineralization protocols for simulated caries lesion: (D1) Shallow chemically-induced caries, (D2) deep chemically-induced caries, (D3) deep bacterially-induced caries. Each disc was divided in five parts; one of those served as baseline control. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.021DOI Listing
May 2019
3 Reads

New multi-layered zirconias: Composition, microstructure and translucency.

Dent Mater 2019 May 7;35(5):797-806. Epub 2019 Mar 7.

Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, USA. Electronic address:

Objectives: To fully realize the range of indication and clinical advantages of the new multi-layered zirconias, a comprehensive understanding of their chemical composition, microstructure, low temperature degradation (LTD) resistance, and translucency properties is paramount.

Methods: A zirconia system (Katana, Kuraray Noritake), including 3 distinct grades of multi-layered zirconias, was selected for study: Ultra Translucent Multi-layered zirconia (UTML), Super Translucent Multi-layered zirconia (STML), and Multi-layered zirconia (ML). For different materials and their individual layers, the chemical composition, zirconia phase fractions, and microstructure were determined by X-ray fluorescence (XRF), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM). Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183147
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http://dx.doi.org/10.1016/j.dental.2019.02.017DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6462415PMC
May 2019
1 Read

Novel dental resin composites containing LiAl-F layered double hydroxide (LDH) filler: Fluoride release/recharge, mechanical properties, color change, and cytotoxicity.

Dent Mater 2019 May 5;35(5):663-672. Epub 2019 Mar 5.

Department of Materials Science and Engineering, National Chung Hsing University, Taiwan, ROC; Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taiwan, ROC. Electronic address:

Objectives: A novel LiAl-F layered double hydroxide (LDH) with a beneficial anions-exchangeable feature was developed for use as a fluoride reservoir. This study aims to investigate the fluoride release/ recharge capability of an LDH-contained dental resin composite and their effects on physical and biological properties.

Methods: 3% and 5% of LDH (R3, R5), wet-milled micro-scale LDH (R3W, R5W), or dry-milled nano-scale LDH (R3D, R5D) were added to a micro-hybrid flowable resin composite (RX). Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.002DOI Listing
May 2019
1 Read

Do thermal treatments affect the mechanical behavior of porcelain-veneered zirconia? A systematic review and meta-analysis.

Dent Mater 2019 May 4;35(5):807-817. Epub 2019 Mar 4.

Department of Restorative Dentistry, Federal University of Santa Maria (UFSM), 1184 Floriano Peixoto Street, 3rd floor, 97015-372, Santa Maria, RS, Brazil. Electronic address:

Objectives: A systematic review of in vitro studies was conducted to assess the effect of thermal treatments on flexural strength or critical load to failure of porcelain-veneered zirconia (PVZ).

Sources: Literature searches were performed up to June 2018 in PubMed/MEDLINE, Scopus and Web of Science databases, with no publication year or language limits.

Data: From 393 relevant studies, 21 were selected for full-text analysis, from which 7 failed to meet the inclusion criteria. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.016DOI Listing

An innovative method for in-situ composition analysis of fixed metallic dental restorations.

Dent Mater 2019 May 5;35(5):709-712. Epub 2019 Mar 5.

CharitéCenter 3 of Dental and Craniofacial Sciences (CC3), Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt - Universität zu Berlin and Berlin Institute of Health, Aßmannshauserstr. 4-6, 14197 Berlin. Electronic address:

Dental restorations made from alloys corrode during their service time. In cases of suspected toxic or allergic reactions to the corrosion products, the composition of the intraoral dental restorations has to be determined. The sample materials can be obtained intra-orally in a non-destructive manner using the chipping test. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.009DOI Listing
May 2019
2 Reads

Biofilm composition and composite degradation during intra-oral wear.

Dent Mater 2019 May 2;35(5):740-750. Epub 2019 Mar 2.

University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Groningen, The Netherlands. Electronic address:

Objectives: The oral environment limits the longevity of composite-restorations due to degradation caused by chewing, salivary and biofilm-produced enzymes and acids. This study investigates degradation of two resin-composites in relation with biofilm composition in vitro and in vivo.

Methods: Surface-chemical-composition of two Bis-GMA/TEGDMA composites was compared using X-ray-Photoelectron-Spectroscopy from which the number ester-linkages was derived. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.024DOI Listing

Effect of the volume fraction of zirconia suspensions on the microstructure and physical properties of products produced by additive manufacturing.

Dent Mater 2019 May 2;35(5):e97-e106. Epub 2019 Mar 2.

Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea. Electronic address:

Objective: The objectives of the present study were: (1) to analyze the dispersion and optical properties of suspensions with various volume fractions of zirconia, and (2) to assess the influence of zirconia volume fraction on the microstructure and physical properties of products produced by the additive manufacturing and sintering process.

Methods: Zirconia specimens were fabricated by an additive manufacturing technique using a DLP (digital light processing) system. The zirconia suspensions were divided into six groups based on zirconia volume fraction within the range of 48-58vol%. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.001DOI Listing
May 2019
1 Read

Microstructural development during heat treatment of a commercially available dental-grade lithium disilicate glass-ceramic.

Dent Mater 2019 May 1;35(5):697-708. Epub 2019 Mar 1.

Department of Biomaterials and Biomimetics, New York University College of Dentistry, NY 10010, USA.

Objective: To elucidate the microstructural evolution of a commercial dental-grade lithium disilicate glass-ceramic using a wide battery of in-situ and ex-situ characterization techniques.

Methods: In-situ X-ray thermo-diffractometry experiments were conducted on a commercially available dental-grade lithium disilicate glass-ceramic under both non-isothermal and isothermal heat treatments in air. These analyses were complemented by experiments of ex-situ X-ray diffractometry, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, differential scanning calorimetry, and field-emission scanning electron thermo-microscopy. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.011DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6462418PMC
May 2019
2 Reads

Fabrication of strontium-releasable inorganic cement by incorporation of bioactive glass.

Dent Mater 2019 May 1;35(5):780-788. Epub 2019 Mar 1.

Department of Biomaterials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan; Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.

Objectives: Bioactive glass (BG) is widely used as a bioactive material for various clinical applications, and effective and efficient elemental release and an increase in mechanical strength are expected with further development. The purpose of this study is to clarify the physicochemical and biological characteristics of Sr-doped BG-incorporated glass ionomer cements.

Methods: Sr-doped BGs (45SiO-6PO-24. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.019DOI Listing
May 2019
1 Read

Halloysite nanotubes loaded with alkyl trimethyl ammonium bromide as antibacterial agent for root canal sealers.

Dent Mater 2019 May 1;35(5):789-796. Epub 2019 Mar 1.

Departamento de Odontología, Facultad de Ciencias de la Salud, Universidad CEU-Cardenal Herrera, C/Del Pozos/n, Alfara del Patriarca, 46115 Valencia, Spain. Electronic address:

Objective: This study aimed at evaluating the effects of experimental endodontic sealers containing halloysite nanotubes (HNT) doped with alkyl trimethyl ammonium bromide (ATAB).

Methods: An experimental dual-cure resin sealer was formulated and used as control material. This resin was also filled with ATAB and HNT at different ratios (GATAB:HNT 1:1; 1:2; 2:1) generate three experimental resin sealers. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.018DOI Listing
May 2019
1 Read

The progressive wear and abrasiveness of novel graded glass/zirconia materials relative to their dental ceramic counterparts.

Dent Mater 2019 May 1;35(5):763-771. Epub 2019 Mar 1.

Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY 10010, USA. Electronic address:

Objective: To investigate the wear behavior of novel graded glass/zirconia materials and their abrasiveness to the antagonist relative to homogeneous zirconias (polished or glazed) and a glass-ceramic.

Methods: Graded glass/zirconia specimens were prepared by sintering with concurrent glass-infiltration of pre-sintered zirconia (3Y-TZP) with a polished or as-machined surface. Monolithic zirconia samples were sintered and their surfaces were polished or glazed (as-machined). Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.022DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6462421PMC
May 2019
2 Reads

Use of (meth)acrylamides as alternative monomers in dental adhesive systems.

Dent Mater 2019 May 28;35(5):686-696. Epub 2019 Feb 28.

Department of Restorative Dentistry, Division of Biomaterials and Biomechanics, Oregon Health & Science University, Portland, OR, USA. Electronic address:

Objectives: Methacrylamides are proposed as components for dental adhesive systems with enhanced resistance to hydrolytic and enzymatic degradation. The specific objective of this study was to evaluate the polymerization kinetics, water sorption and solubility, pH-derived degradation and microtensile bond strength of various monofunctional acrylamides and meth(acrylamides) when copolymerized with dimethacrylates.

Methods: Base monomers were added at 60 wt%, and included either BisGMA or UDMA. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.012DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6462417PMC
May 2019
1 Read

Effects of alumina-blasting pressure on the bonding to super/ultra-translucent zirconia.

Dent Mater 2019 May 28;35(5):730-739. Epub 2019 Feb 28.

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.

Objectives: Translucent zirconia has brought the advantages such as less tooth preparation, biological compatibility, high strength, good mechanical properties, and less antagonist wear. This study's aim was to elucidate how clinically relevant surface treatments; alumina-abrasion and priming effect on bond strength of Y-PSZ in three different translucency grades after long-term water storage.

Materials And Methods: Three highly translucent Y-PSZ grades were ground flat with #600-grit SiC paper. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.025DOI Listing
May 2019
3 Reads

An integrated multifunctional hybrid cement (pRMGIC) for dental applications.

Dent Mater 2019 Apr 25;35(4):636-649. Epub 2019 Feb 25.

Centre for Oral, Clinical & Translation Sciences, Faculty of Dentistry, Oral & Craniofacial Sciences, Floor 17, Tower Wing, Guy's Hospital, London Bridge, London, SE1 9RT, UK. Electronic address:

Objective: Glass-ionomer and resin-modified glass-ionomer cements are versatile materials with the ability to form a direct bond with tooth tissues. The aim of this study was to formulate a novel class of dental bio-interactive restorative material (pRMGIC) based on resin-modified glass-ionomer cements via the inclusion of an organophosphorus monomer, ethylene glycol methacrylate phosphate, with a potential to improve the mechanical properties and also function as a reparative restorative material.

Methods: pRMGIC was formulated with modification of the resin phase by forming mixes of ethylene glycol methacrylate phosphate (EGMP; 0-40%wt) and 2-hydroxyethyl methacrylate monomer into the liquid phase of a RMGIC (Fuji II LC, GC Corp. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.005DOI Listing
April 2019
1 Read

Real-time in-depth imaging of gap formation in bulk-fill resin composites.

Dent Mater 2019 Apr 25;35(4):585-596. Epub 2019 Feb 25.

Department of Restorative Dentistry, Biomimetics Biomaterials Biophotonics Biomechanics & Technology Laboratory, School of Dentistry, University of Washington, 1959 NE Pacific Street, Seattle, WA 98195-7456, USA; Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. Electronic address:

Objectives: This study visualized in real-time the gap forming of bulk-fill resin composites during polymerization using optical coherence tomography (OCT).

Methods: Light-cured bulk-fill resin composites; Tetric N-ceram Bulk Fill (TNB), SonicFill (SNF), Surefil SDR (SDR), dual-cured bulk-fill resin composite Bulk EZ (BEZ), and light-cured core resin composite Clearfil Photo Core (CPC) were investigated. Swept-source OCT real-time cross-sectional monitoring was obtained during resin composite placement and curing procedure. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.020DOI Listing

Oxidative stress induced by self-adhesive resin cements affects gene expression, cellular proliferation and mineralization potential of the MDPC-23 odontoblast-like cells.

Dent Mater 2019 Apr 23;35(4):606-616. Epub 2019 Feb 23.

Department of Biochemistry, Federal University of São Paulo, São Paulo, Brazil. Electronic address:

Objective: Clinical issues have been raised about problems related to cytotoxic effects caused when applying self-adhesive cement. It was hypothesized that byproducts eluted from self-adhesive cements modulate oxidative stress response, the gene expression of signaling pathways of inflammatory process/transcriptional activators, and the expression and activity of interstitial collagenases, and modify the phenotypic characteristics of cellular proliferation and mineral deposition in odontoblastic-like cells.

Methods: Cements (MaxCem Elite [MAX] and RelyX U200 [U200)]) were mixed, dispensed into moulds, and photoactivated according to the manufacturers' instructions. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.008DOI Listing
April 2019
5 Reads

Bioactive glass composite for orthodontic adhesives - Formation and characterisation of apatites using MAS-NMR and SEM.

Dent Mater 2019 Apr 23;35(4):597-605. Epub 2019 Feb 23.

Queen Mary University of London, Barts & The London School of Medicine and Dentistry, Institute of Dentistry, Centre for Oral Bioengineering, Mile End Road, London, E1 4NS, UK.

Objectives: To study the dissolution and fluoroapatite (FAP) formation of a new bioactive glass (BAG)-resin adhesive in an acidic solution in reference to neutral solutions, using the magic angle spinning-nuclear magnetic resonance (MAS-NMR) and the scanning electron microscopy (SEM).

Methods: BAG composite disks (n = 90) were prepared from, novel fluoride-containing BAG-resin. Three sample groups (n = 30) of the disks were immersed in Tris buffer pH = 7. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.010DOI Listing
April 2019
1 Read

Monitoring demineralization and remineralization of human dentin by characterization of its structure with resonance-enhanced AFM-IR chemical mapping, nanoindentation, and SEM.

Dent Mater 2019 Apr 23;35(4):617-626. Epub 2019 Feb 23.

University of Nebraska-Lincoln, 1400 R St., Lincoln, NE 68588, United States.

Objective: This research aimed at monitoring demineralization and remineralization of dentin and its collagen matrix at the nanoscale by amorphous, microcrystalline, and in situ formed hydroxyapatite.

Methods: The concurrent use of the resonance-enhanced atomic force microscopy coupled with infrared probe (AFM-IR) chemical mapping, nano-indentation, and scanning electron microscopy (SEM) provides a detailed insight into the structure of human dentin, as well as to the processes of its partial demineralization and remineralization.

Results: The resonance-enhanced AFM-IR chemical mapping of dentin has shown to be a useful method to follow distribution of its collagen and hydroxyapatite components at the micro- and nanoscale levels, especially in conjunction with SEM imaging and nanoindentation. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183058
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http://dx.doi.org/10.1016/j.dental.2019.02.007DOI Listing
April 2019
8 Reads

Antioxidants as a novel dental resin-composite component: Effect on elution and degree of conversion.

Dent Mater 2019 Apr 22;35(4):650-661. Epub 2019 Feb 22.

Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Germany; Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Germany. Electronic address:

Objective: Ascorbic acid (Asc) and N-acetylcysteine (NAC) were reported to reduce genotoxicity induced by dental (co)monomers and their epoxy metabolites. The aim of the present study was to investigate Asc or NAC as novel components in light-curable methacrylate based dental composites regarding their effects on degree of conversion (DC) and elution of composite components. Additionally, the release of Asc or NAC was determined. Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.003DOI Listing
April 2019
3.769 Impact Factor

The effect of adding a new monomer "Phene" on the polymerization shrinkage reduction of a dental resin composite.

Dent Mater 2019 Apr 21;35(4):627-635. Epub 2019 Feb 21.

Department of Biomaterials Science and Turku Clinical Biomaterials Center - TCBC, Institute of Dentistry, University of Turku, Turku, Finland.

Objective: A new photocurable monomer, "Phene" (N-methyl-bis(ethyl-carbamate-isoproply-α-methylstyryl)amine) was synthesized and incorporated into Bis-GMA/TEGDMA with the aim of reducing polymerization shrinkage swithout detriment to the physical properties and wearing of the resin composites.

Methods: Phene was synthesized through a 2-step reaction route, and its structure was confirmed by FT-IR and H-NMR spectra. Phene was incorporated into Bis-GMA/TEGDMA (50/50, wt/wt) with a series of mass fraction (from 0 wt% to 40 wt%). Read More

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http://dx.doi.org/10.1016/j.dental.2019.02.006DOI Listing
April 2019
1 Read

Three-dimensional assessment of proximal contact enamel using optical coherence tomography.

Dent Mater 2019 Apr 13;35(4):e74-e82. Epub 2019 Feb 13.

Department of Cariology and Operative Dentistry, Division of Oral Health Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Objective: The purpose of this study was to detect and investigate the association of enamel microcracks with demineralization at proximal contact areas of premolars, using 3D swept-source optical coherence tomography (SS-OCT).

Methods: Extracted maxillary and mandibular premolars (n=50 each), without any visible tooth cracks, were examined for demineralization of interproximal contact areas, using the International Caries Detection and Assessment System (ICDAS). SS-OCT was used to evaluate demineralization and detect microcracks. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.008DOI Listing

File-splitting multilayer vs monolithic Y-TZP: Fatigue flexural strength and loading stresses by finite element analysis.

Dent Mater 2019 Apr 10;35(4):e63-e73. Epub 2019 Feb 10.

Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. Electronic address:

Objective: To compare file-splitting multilayer (fused and cemented) with monolithic Y-TZP on the fatigue flexural strength and finite element analysis (FEA) stresses. Additionally, to verify the effect of the material under tension in multilayer Y-TZP.

Methods: Disc-shaped (diameter: 14. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.014DOI Listing
April 2019
3 Reads

Influence of veneer pore defects on fracture behavior of bilayered lithium disilicate glass-ceramic crowns.

Dent Mater 2019 Apr 8;35(4):e83-e95. Epub 2019 Feb 8.

Department of Prosthodontics, Guanghua School of Stomatology, Sun Yat-sen University; Guangdong Engineering Research Center of Technology and Materials for Oral Reconstruction, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China. Electronic address:

Objective: To identify the conditions under which fabrication pore defects within veneering porcelain in bilayered lithium disilicate glass-ceramic (LDG) crowns will influence and jeopardize the mechanical integrity of the structure.

Methods: Thirty standardized molar crowns (IPS e.max Press) were fabricated and microCT scanned to 3D-analyze the size, morphology and distribution of pores in veneering porcelain, followed by in vitro fracture test and SEM fractographic observation. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.016DOI Listing
April 2019
4 Reads

Thermal induced deflection of a porcelain-zirconia bilayer: Influence of cooling rate.

Dent Mater 2019 Apr 7;35(4):574-584. Epub 2019 Feb 7.

Vita Zahnfabrik GmbH, Bad Sachingen, Germany.

Objective: To determine the thermal expansion of a porcelain (VM9) and tetragonal zirconia (Y-TZP) as well as the deflection upon re-heating and cooling of a bilayer fabricated from these two materials after slow and rapid cooling during initial fabrication.

Methods: The coefficient of thermal expansion (CTE) of bulk porcelain and Y-TZP as well as bilayer beam deflection was measured with a novel non-contact optical dilatometer. The influence of cooling rate during initial fabrication of the porcelain-zirconia bilayer and the bulk porcelain during subsequent heating and cooling is investigated. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183062
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http://dx.doi.org/10.1016/j.dental.2019.01.019DOI Listing
April 2019
1 Read

Design and characterization of a chitosan-enriched fibrin hydrogel for human dental pulp regeneration.

Dent Mater 2019 Apr 31;35(4):523-533. Epub 2019 Jan 31.

Laboratoire de Biologie Tissulaire et Ingénierie thérapeutique, UMR5305 CNRS/Université Lyon 1, UMS3444 BioSciences Gerland-Lyon Sud, Lyon, France; Université de Lyon, Université Lyon 1, Faculté d'Odontologie, Lyon, France; Hospices Civils de Lyon, Service d'Odontologie, Lyon, France. Electronic address:

Objective: Regenerating a functional dental pulp in the pulpectomized root canal has been recently proposed as a novel therapeutic strategy in dentistry. To reach this goal, designing an appropriate scaffold able to prevent the growth of residual endodontic bacteria, while supporting dental pulp tissue neoformation, is needed. Our aim was to create an innovative cellularized fibrin hydrogel supplemented with chitosan to confer this hydrogel antibacterial property. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.018DOI Listing

Effects of the reinforced cellulose nanocrystals on glass-ionomer cements.

Dent Mater 2019 Apr 30;35(4):564-573. Epub 2019 Jan 30.

Department of Dental Materials, Endodontics and Operative Dentistry, Bauru School of Dentistry-FOB-USP, Al. Octávio Pinheiro Brisolla, 9-75, 17012-901, Bauru, SP, Brazil.

Objective: Glass-ionomer cements (GICs) modified with cellulose nanocrystals (CNs) were characterized and evaluated for compressive strength (CS), diametral tensile strength (DTS) and fluoride release (F).

Methods: Commercially available GICs (Maxxion, Vidrion R, Vitro Molar, Ketac Molar Easy Mix and Fuji Gold Label 9) were reinforced with CNs (0.2% by weight). Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.006DOI Listing
April 2019
1 Read

Effect of pulse-width-modulated LED light on the temperature change of composite in tooth cavities.

Dent Mater 2019 Apr 31;35(4):554-563. Epub 2019 Jan 31.

Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea. Electronic address:

Objective: The purpose of this study was to investigate the effects of the radiant emittance and cure time of pulse width modulation (PWM)-controlled LED light on the temperature change of composite and dentin.

Methods: Class I cavities (M-D 6mm, B-L 4mm, Depth 2.5mm) were prepared on 30 extracted human molars and vertically sectioned to expose the mesial side of the cavity and tooth. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.009DOI Listing
April 2019
2 Reads

Effectiveness of pre-silanization in improving bond performance of universal adhesives or self-adhesive resin cements to silica-based ceramics: Chemical and in vitro evidences.

Dent Mater 2019 Apr 31;35(4):543-553. Epub 2019 Jan 31.

Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Department of Endodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, China. Electronic address:

Objectives: To examine effectiveness of pre-silanization in improving bond performance of multipurpose products such as universal adhesives or self-adhesive resin cements to silica-based ceramics.

Methods: The present study investigated reactions between silanol groups of γ-methacryloxypropyltrimethoxysilane (γ-MPS) and silica, dehydration self-condensation of γ-MPS, and condensation polymerization between γ-MPS and 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) by using thermodynamic calculations. Shear bond strength (SBS) tests were used to evaluate the influence of pre-silanization on resin bonding when a silane-containing universal adhesive, a silane-unknown universal adhesive, or two self-adhesive resin cements were applied for bonding lithium disilicate to resin. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.010DOI Listing
April 2019
1 Read

Influence of external energy sources on the dynamic setting process of glass-ionomer cements.

Dent Mater 2019 Mar 30;35(3):450-456. Epub 2019 Jan 30.

Department of Dentistry, State University of Maringa, Av. Mandacaru 1550, 87080-000 Maringá, PR, Brazil. Electronic address:

Objective: To evaluate the influence of external energy sources on the dynamic setting process of glass-ionomer restorative materials.

Methods: Eighteen brands of GIC were studied: Bioglass R (Biodinâmica; G1), Chemfil Rock (Dentsply; G2), Equia Forte (GC; G3), Gold Label 2 (GC; G4), Gold Label 9 (GC; G5), Glass Ionomer Cement Type II - (Shofu; G6), Ionglass R (Maquira; G7), Ion Z (FGM; G8), Ionomaster (Wilcos; G9), Ionofil Plus (Voco; G10), Ionostar Plus (Voco; G11), Ketac Molar easymix (3M ESPE; G12), Magic Glass R (Vigodent; G13), Maxxion R (FGM; G14), Riva Self Cure (SDI; G15), Vidrion R (SS White; G16), Vitro Fil R (Nova DFL; G17) and Vitro Molar (Nova DFL; G18). LED, halogen light or ultrasound (n=20 for each set) applied for 30s was used to activate setting, and a control group of each material was allowed to set without activation. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183057
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http://dx.doi.org/10.1016/j.dental.2019.01.003DOI Listing
March 2019
2 Reads

Long-term elution of monomers from resin-based dental composites.

Dent Mater 2019 Mar 28;35(3):477-485. Epub 2019 Jan 28.

KU Leuven BIOMAT, Department of Oral Health Sciences, University of Leuven & Dentistry University Hospitals Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium. Electronic address:

Objective: To bridge the gap between the current alarming literature on resin-based dental materials and the limited clinical observations, more precise knowledge on the actual quantity of released compounds should be acquired. The objective of this study was to quantify the long-term elution of various compounds from resin-based dental composites during one year.

Methods: Eight materials were investigated: G-aenial Anterior, G-aenial Posterior, Venus, Venus Pearl, Venus Diamond, Ceram X mono, Dyract and Filtek Supreme XTE. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183120
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http://dx.doi.org/10.1016/j.dental.2019.01.005DOI Listing
March 2019
3 Reads

Fatigue performance of adhesively cemented glass-, hybrid- and resin-ceramic materials for CAD/CAM monolithic restorations.

Dent Mater 2019 Apr 25;35(4):534-542. Epub 2019 Jan 25.

PhD Graduate Program in Oral Science (Prosthodontics Unit), Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil. Electronic address:

Objective: To evaluate the fatigue failure load, number of cycles until failure, and survival probability of adhesively cemented materials with different microstructures (glass-, hybrid- and resin-ceramic) used to manufacture CAD/CAM monolithic restorations.

Methods: Disc-shaped specimens (n=15; Ø=10mm; thickness=1.0mm) were produced from CAD/CAM blocks as follows: feldspathic (FEL); leucite (LEU); lithium disilicate (LD); zirconia-reinforced lithium silicate (ZRLS); polymer-infiltrated ceramic network (PICN); and resin nanoceramic (RNC). Read More

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https://linkinghub.elsevier.com/retrieve/pii/S01095641183055
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http://dx.doi.org/10.1016/j.dental.2019.01.013DOI Listing
April 2019
8 Reads

Production tolerance of conventional and digital workflow in the manufacturing of glass ceramic crowns.

Dent Mater 2019 Mar 25;35(3):486-494. Epub 2019 Jan 25.

Institution of Odontology, Göteborg university, Göteborg, Sweden. Electronic address:

Objectives: To measure and compare the size of the cement gap of wax and polymer copings and final glass-ceramic crowns, produced from conventional and digital workflows, one additive and one subtractive.

Methods: Thirty wax copings were made by conventional manual layering technique and modeling wax on stone models with spacer varnish simulating a cement spacer. The wax copings were embedded and press-cast in lithium disilicate glass ceramic. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.015DOI Listing

Validation of in-vitro tests of zirconia-ceramic inlay-retained fixed partial dentures: A finite element analysis.

Dent Mater 2019 Mar 25;35(3):e53-e62. Epub 2019 Jan 25.

Department of Prosthodontics, Heidelberg University Hospital, University of Heidelberg, Heidelberg, Germany.

Objective: In the past, discrepancies between laboratory results and clinical behavior have been observed for all-ceramic restorations. This analysis of fracture resistance of zirconia-based inlay-retained fixed partial dentures (IRFPDs) aimed at identifying correlations between an in-vitro test setup and the clinical situation. The effects of tooth material, tooth mobility, restoration design, load direction, and different cements were taken into account. Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.017DOI Listing

Lifetime prediction of veneered versus monolithic lithium disilicate crowns loaded on marginal ridges.

Dent Mater 2019 Mar 25;35(3):511-522. Epub 2019 Jan 25.

Department of Prosthodontics and Periodontology, University of São Paulo, Bauru School of Dentistry, Bauru, SP, Brazil. Electronic address:

Objective: To evaluate the probability of survival of monolithic and porcelain veneered lithium disilicate crowns comprised by a conventional or modified core when loaded on marginal ridges.

Methods: Lithium disilicate molar crowns (n=30) were fabricated to be tested at mesial and distal marginal ridges and were divided as follows: (1) bilayered crowns with even-thickness 0.5mm framework (Bi-EV); (2) bilayered crowns with modified core design (Bi-M-lingual collar connected to proximal struts), and: (3) monolithic crowns (MON). Read More

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http://dx.doi.org/10.1016/j.dental.2019.01.007DOI Listing