Modulation of gingival cell response towards dental composites
This aim of this study was to investigate the cell behavioural response on clinically applied dental composites in exposition-relevant target cells, i.e. human gingival fibroblasts (HGF) and epithelial keratinocytes (HGK). (Source: Dental Materials)
Source: Dental Materials - January 3, 2018 Category: Materials Science Authors: A. Jerg, S.D. Schulz, P. Tomakidi, E. Hellwig, O. Polydorou Source Type: research
Influence of a surface conditioner to pre-sintered zirconia on the biaxial flexural strength and phase transformation
Zirconia ceramic is one of the most promising materials for metal-free restorations because of its excellent mechanical properties and reasonable esthetics [1]. Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) is used as a framework substrate and a monolithic material in all-ceramic dental restorations [1 –3]. Zirconia exists in three different crystalline phases according to the temperature: monoclinic (up to 1170°C), tetragonal (1170°C–2370°C), and cubic (above 2370°C) [4]. Y-TZP, which comprises tetragonal zirconia particles and Y2O3 added as a stabilizer, can exist at room temperature [5] . (Source: Dental Materials)
Source: Dental Materials - January 1, 2018 Category: Materials Science Authors: Tomofumi Sawada, Christine Schille, Judit Z öldföldi, Ernst Schweizer, Jürgen Geis-Gerstorfer, Sebastian Spintzyk Source Type: research
Release of ICTP and CTX telopeptides from demineralized dentin matrices: Effect of time, mass and surface area
The present study evaluated the influence of time, mass and surface area of demineralized dentin collagen matrices on telopeptides release. The hypotheses tested were that the rates of ICTP and CTX release by matrix bound endogenous proteases are 1) not time-dependent, 2) unrelated to specimen mass, 3) unrelated to specimen surface area. (Source: Dental Materials)
Source: Dental Materials - January 1, 2018 Category: Materials Science Authors: Gianluca Turco, Milena Cadenaro, Tatjana Maravi ć, Andrea Frassetto, Eleonora Marsich, Annalisa Mazzoni, Roberto Di Lenarda, Franklin R. Tay, David H. Pashley, Lorenzo Breschi Source Type: research
Development of radiopaque, biocompatible, antimicrobial, micro-particle fillers for micro-CT imaging of simulated periodontal pockets
Periodontitis (PD) is an inflammatory disease of bacterial origin that can culminate in tooth loss [1,2]. PD is also associated with multiple systemic diseases, such as cardiovascular diseases, diabetes mellitus, cancer, and Alzheimer ’s diseases [3]. Indeed, nearly 50% of the U.S. population is affected by PD [4]. (Source: Dental Materials)
Source: Dental Materials - December 26, 2017 Category: Materials Science Authors: M. Elashiry, M.M. Meghil, S. Kalathingal, A. Buchanan, M. Rajendran, R. Elrefai, M. Ochieng, A. Elawady, R.M. Arce, K.H. Sandhage, C.W. Cutler Source Type: research
An evaluation of the biocompatibility and osseointegration of novel glass fiber reinforced composite implants: In vitro and in vivo studies
Dental implant therapy is a well-accepted treatment modality for the replacement of missing teeth; while, in addition, metallic fracture fixation devices have been accepted as a useful system for orthopedic rehabilitation [1,2]. Traditional metal biomaterials, such as commercial pure titanium and titanium alloy (Ti6Al4V), are widely used in dental and orthopedic applications because of their desirable mechanical properties, their chemical stability and their biocompatibility [3,4]. However, there have been some concerns associated with the use of these metal devices related to potential metal ion release, metal allergy, ra...
Source: Dental Materials - December 26, 2017 Category: Materials Science Authors: Ya-Hui Chan, Wei-Zhen Lew, Emily Lu, Thomas Loretz, Luke Lu, Che-Tong Lin, Sheng-Wei Feng Source Type: research
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(Source: Dental Materials)
Source: Dental Materials - December 22, 2017 Category: Materials Science Source Type: research
The anti-caries effects of dental adhesive resin influenced by the position of functional groups in quaternary ammonium monomers
Adhesive systems and resin composites are widely used in direct dental restoration due to esthetics and improved properties [1 –3]. However, the failure of composite restorations is still a major problem. The failure rate ranges from 15% to 50% according to previous survival investigation [4–6]. Replacement dentistry accounts for more than 50% of all the restorations performed, and costs more than $5 billion annually in the U.S [7–9]. The main reasons for the failure are secondary caries and bulk fraction [10–13]. (Source: Dental Materials)
Source: Dental Materials - December 18, 2017 Category: Materials Science Authors: Jingou Liang, Mingyun Li, Biao Ren, Tianmu Wu, Hockin H.K. Xu, Yong Liu, Xian Peng, Ge Yang, Michael D. Weir, Shiyong Zhang, Lei Cheng, Xuedong Zhou Source Type: research
Residual stress of porcelain-fused to zirconia 3-unit fixed dental prostheses measured by nanoindentation
To evaluate the residual stress (nanoindentation based on hardness) of fatigued porcelain-fused to zirconia 3-unit fixed dental prostheses (FDP) with different framework designs. (Source: Dental Materials)
Source: Dental Materials - December 16, 2017 Category: Materials Science Authors: Vinicius P. Fardin, Estevam A. Bonfante, Paulo G. Coelho, Malvin N. Janal, Nick Tovar, Lukasz Witek, Dimorvan Bordin, Gerson Bonfante Source Type: research
Effect of tetracalcium phosphate/monetite toothpaste on dentin remineralization and tubule occlusion in vitro
To investigate the tubule occlusion and remineralization potential of a novel toothpaste with active tetracalcium phosphate/monetite mixtures under de/remineralization cycling. (Source: Dental Materials)
Source: Dental Materials - December 9, 2017 Category: Materials Science Authors: L. Medvecky, R. Stulajterova, M. Giretova, J. Mincik, M. Vojtko, J. Balko, J. Briancin Source Type: research
Smear layer-deproteinizing improves bonding of one-step self-etch adhesives to dentin
This study aimed to investigate those effects on various one-step self-etch adhesives. (Source: Dental Materials)
Source: Dental Materials - December 9, 2017 Category: Materials Science Authors: Ornnicha Thanatvarakorn, Taweesak Prasansuttiporn, Suppason Thittaweerat, Richard M. Foxton, Shizuko Ichinose, Junji Tagami, Keiichi Hosaka, Masatoshi Nakajima Source Type: research
Long-term stability of dental adhesive incorporated by boron nitride nanotubes
Adhesive dentistry has advanced significantly over the past ten years, although premature reductions in bond strength, interface and marginal degradation, and biocompatibility of adhesives still pose challenge to the field [1]. These issues may occur due to the presence of non-entangled exposed collagen fibrils in the partially or completely demineralized dentin, after the etching step from acids or acidic resin monomers [2]. The incomplete monomer infiltration into the collagen matrix leads to the presence of mineral-depleted, resin-sparse, water-rich fibrils along the bonded interface challenging the interfacial integrit...
Source: Dental Materials - December 4, 2017 Category: Materials Science Authors: Felipe Weidenbach Degrazia, Vicente Castelo Branco Leitune, Fernanda Visioli, Susana Maria Werner Samuel, Fabr ício Mezzomo Collares Source Type: research
Bonding strategies for MIH-affected enamel and dentin
Aim of the present study was to evaluate resin composite adhesion to dental hard tissues affected by molar incisor hypomineralisation (MIH). (Source: Dental Materials)
Source: Dental Materials - December 2, 2017 Category: Materials Science Authors: Norbert Kr ämer, Ngoc-Han Nana Bui Khac, Susanne Lücker, Vitus Stachniss, Roland Frankenberger Source Type: research
Practical and theoretical considerations on the fracture toughness testing of dental restorative materials
An important tool in materials research, development and characterization regarding mechanical performance is the testing of fracture toughness. A high level of accuracy in executing this sort of test is necessary, with strict requirements given in extensive testing standard documents. Proficiency in quality specimen fabrication and test requires practice and a solid theoretical background, oftentimes overlooked in the dental community. Aims: In this review we go through some fundamentals of the fracture mechanics concepts that are relevant to the understanding of fracture toughness testing, and draw attention to critical ...
Source: Dental Materials - December 1, 2017 Category: Materials Science Authors: Renan Belli, Michael Wendler, Jos é I. Zorzin, Ulrich Lohbauer Source Type: research
Can pulpal floor debonding be detected from occlusal surface displacement in composite restorations?
Polymerization shrinkage of resin composite restorations can cause debonding at the tooth –restoration interface. Theory based on the mechanics of materials predicts that debonding at the pulpal floor would half the shrinkage displacement at the occlusal surface. The aim of this study is to test this theory and to examine the possibility of detecting subsurface resin composite restorat ion debonding by measuring the superficial shrinkage displacements. (Source: Dental Materials)
Source: Dental Materials - November 30, 2017 Category: Materials Science Authors: Jo ão Batista Novaes, Elissa Talma, Estevam Barbosa Las Casas, Wondwosen Aregawi, Lauren Wickham Kolstad, Sue Mantell, Yan Wang, Alex Fok Source Type: research
Characterization, mechanistic analysis and improving the properties of denture adhesives
The objective of this study was to understand the effect of environmental conditions on the adhesion properties of a commercially available denture adhesive named as Poligrip ® Free manufactured by GlaxoSmithKline Ltd., UK and to identify the reasons for the observed variation in its adhesion strength. (Source: Dental Materials)
Source: Dental Materials - November 30, 2017 Category: Materials Science Authors: Afsoon Fallahi, Nona Khadivi, Nima Roohpour, Andrew M. Middleton, Mehdi Kazemzadeh-Narbat, Nasim Annabi, Ali Khademhosseini, Ali Tamayol Source Type: research
