Development of an oxirane/acrylate interpenetrating polymer network (IPN) resin system
Develop a hydrophobic, degradation-resistant dental restorative based on an Oxirane-Acrylate IPN System (OASys) with low shrinkage-stress to substantially extend clinical lifetime. (Source: Dental Materials)
Source: Dental Materials - June 18, 2018 Category: Materials Science Authors: Robert Danso, Blake Hoedebecke, Kyumin Whang, Shayda Sarrami, Allen Johnston, Sam Flipse, Nancy Wong, H. Ralph Rawls Source Type: research

Niobium addition to sol-gel derived bioactive glass powders and scaffolds: In vitro characterization and effect on pre-osteoblastic cell behavior
Bioactive glasses are synthetic biocompatible materials that are able to interact with host tissue due to ion release when in contact with living tissues. Both composition and microstructure of glasses are important for its ability to promote bone deposition [1]. Sol –gel route has been used as an easier and successful route to produce both bioactive glass powders [2] and porous tridimensional structures [3]. Bioactive glass powder synthetized by sol–gel route results in particles with superficial porosity and high surface area, while gel cast foaming has be en shown to produce scaffolds with controlled porosit...
Source: Dental Materials - June 18, 2018 Category: Materials Science Authors: Gabriela de Souza Balbinot, Fabricio Mezzomo Collares, Fernanda Visioli, Priscilla Barbosa Ferreira Soares, Antonio Shigueaki Takimi, Susana Maria Werner Samuel, Vicente Castelo Braco Leitune Source Type: research

The influence of precursor addition order on the porosity of sol –gel bioactive glasses
Bioactive glasses are well known materials researched for their application in bone and dental restoration/regeneration [1 –5]. Thanks to the addition of dopants such as copper, zinc, strontium and magnesium to bioactive glasses, their potential for angiogenesis [6], enhanced antibacterial effects [7] and improved bioactivity [8–11] has been unveiled. Due to their impressive bioactivity and bone bonding ability bioa ctive glasses are used in clinical applications as bone graft, implant coating [12,13] and recently in dentifrices such as Sensodyne® and BioMin™ to treat dentin hypersensitivity and induc...
Source: Dental Materials - June 16, 2018 Category: Materials Science Authors: Delihta Fernando, Pierre Colon, Mark Cresswell, Catherine Journet, Nelly Pradelle-Plasse, Phil Jackson, Brigitte Grosgogeat, Nina Attik Source Type: research

Fatigue lifetime prediction of a reduced-diameter dental implant system: Numerical and experimental study
In recent decades, dental implants have been widely used as an effective method to replace missing teeth and improve the patient ’s quality of life. According to the facts and figures provided by the American Academy of Implant Dentistry, over 5.5 million dental implants had been placed by United States dentists as of 2006. Although most of the clinical studies reported overall five-year success rates of 93%–97% for denta l implants, biological and technical complications are still frequently observed [1–5]. (Source: Dental Materials)
Source: Dental Materials - June 16, 2018 Category: Materials Science Authors: Yuanyuan Duan, Jorge A. Gonzalez, Pratim A. Kulkarni, William W. Nagy, Jason A. Griggs Source Type: research

Bonding to caries affected dentine
Carious dentin consists of two distinct layers: an outer bacterially infected layer of dentine, and an inner layer of affected dentine [1]. The caries-infected layer (CID) is highly demineralized, physiologically unremineralizable and contains irreversibly denatured collagen fibrils with a virtual disappearance of cross-linkages [2,3]. On the other hand, the caries-affected layer (CAD) is uninfected, partially demineralized and physiologically remineralizable [2 –4]. High porosity and exposure of collagen fibers along with a decrease in the surface energy are seen in the inter-tubular CAD [2–4]. (Source: Dental Materials)
Source: Dental Materials - June 8, 2018 Category: Materials Science Authors: Naghmeh Meraji, Mohammad H. Nekoofar, Kazem Ashofteh Yazdi, Mohammad Reza Sharifian, Noushin Fakhari, Josette Camilleri Source Type: research

Modal analysis for implant stability assessment: Sensitivity of this methodology for different implant designs
To investigate the influence of implant design on the change in the natural frequency of bone-implant system during osseointegration by means of a modal 3D finite element analysis. (Source: Dental Materials)
Source: Dental Materials - June 8, 2018 Category: Materials Science Authors: Elisabetta Maria Zanetti, Stefano Ciaramella, Michele Cal ì, Giulia Pascoletti, Massimo Martorelli, Riccardo Asero, David C. Watts Source Type: research

Editorial Board
(Source: Dental Materials)
Source: Dental Materials - June 6, 2018 Category: Materials Science Source Type: research

Investigating the limits of resin-based luting composite photopolymerization through various thicknesses of indirect restorative materials
To determine the limitations of using light-curable resin-based luting composites (RBLCs) to bond indirect ceramic/resin-composite restorations by measuring light transmittance through indirect restorative materials and the resulting degree of conversion (DC) of the luting-composites placed underneath. (Source: Dental Materials)
Source: Dental Materials - May 29, 2018 Category: Materials Science Authors: C.M.F. Hardy, S. Bebelman, G. Leloup, M.A. Hadis, W.M. Palin, J.G. Leprince Source Type: research

Modification of the restoration protocol for resin-based composite (RBC) restoratives (conventional and bulk fill) on cuspal movement and microleakage score in molar teeth
To modify the resin-based composite (RBC) restoration protocol for standardised Class II cavities in third molar teeth restored using conventional RBCs or their bulk fill restorative counterparts. Employing cuspal deflection using a twin channel deflection measuring gauge (during) and microleakage to determine marginal integrity (following) RBC restoration, the modified restoration protocol results were compared with traditional (oblique) restoration of Class II cavities. (Source: Dental Materials)
Source: Dental Materials - May 29, 2018 Category: Materials Science Authors: I. Politi, L.E.J. McHugh, R.S. Al-Fodeh, G.J.P. Fleming Source Type: research

Internal adjustments decrease the fatigue failure load of bonded simplified lithium disilicate restorations
Monolithic restorations present great advantages when compared to bilayer ceramic systems due to fewer steps in the fabrication process, and the absent susceptibility to chipping [1]. In addition, lithium disilicate glass-ceramics stand out for combining satisfactory aesthetic and mechanical properties among ceramic materials available to produce monolithic restorations [2]. Lithium disilicate ceramic is indicated to produce inlays, onlays, anterior and posterior single crowns and three-unit bridges (up to the second premolar) [3]. (Source: Dental Materials)
Source: Dental Materials - May 28, 2018 Category: Materials Science Authors: Camila da Silva Rodrigues, Lu ís Felipe Guilardi, Andressa Cargnelutti Follak, Catina Prochnow, Liliana Gressler May, Luiz Felipe Valandro Source Type: research

The effect of desiccation on water sorption, solubility and hygroscopic volumetric expansion of dentine replacement materials
To evaluate water sorption, solubility and hygroscopic expansion and the effect of desiccation for a calcium silicate-based material, a conventional glass ionomer, and a resin-modified glass ionomer. (Source: Dental Materials)
Source: Dental Materials - May 24, 2018 Category: Materials Science Authors: Ruba Mustafa, Ruwaida Z. Alshali, Nick Silikas Source Type: research

Structure –properties relationships in dental adhesives: Effect of initiator, matrix monomer structure, and nano-filler incorporation
This is a confirmatory study to evaluate the effect of photoinitiator type and concentration, matrix monomer chemical structure, and nanoparticle incorporation on the physical and mechanical properties of an experimental dentin bonding agent. (Source: Dental Materials)
Source: Dental Materials - May 22, 2018 Category: Materials Science Authors: Elham Azad, Mohammad Atai, Mojgan Zandi, Parvin Shokrollahi, Laleh Solhi Source Type: research

Effect of light curing units on the polymerization of bulk fill resin-based composites
The manufacturers of bulk fill resin-based composites (RBCs) claim that it possible to successfully photo-cure 4 or even 5-mm increments of RBC instead of the customary 2mm increment. While this approach may introduce less voids between each increment and reduce overall treatment times, the ability to adequately photo-cure such a large volume of RBC in one exposure is a concern. (Source: Dental Materials)
Source: Dental Materials - May 22, 2018 Category: Materials Science Authors: Carlos Alberto Kenji Shimokawa, M íriam Lacalle Turbino, Marcelo Giannini, Roberto Ruggiero Braga, Richard Bengt Price Source Type: research

Biaxial flexural strength of the bilayered disk composed of ceria-stabilized zirconia/alumina nanocomposite (Ce-TZP/A) and veneering porcelain
For dental fixed prostheses, modern patients are prone to select all-ceramic restorations instead of metal-ceramic restorations due to adequate mechanical properties, esthetic and biocompatibility reasons [1]. In particular, zirconia-based all-ceramic restorations have a wide range of applications from single crowns to long-span fixed partial dentures (FPDs) with their high mechanical strengths [2]. In clinical applications, outstanding development and emergence of a variety of dental computer-aided design/computer-aided manufacturing (CAD/CAM) technologies have made it possible to use two main types of zirconia ceramics; ...
Source: Dental Materials - May 21, 2018 Category: Materials Science Authors: Tomofumi Sawada, Christine Schille, Verena Wagner, Sebastian Spintzyk, Ernst Schweizer, J ürgen Geis-Gerstorfer Source Type: research

Mechanical behavior of CAD/CAM occlusal ceramic reconstruction assessed by digital color holography
Because of their high biocompatibility, pleasing aesthetics [1], the development and the improvement of reliable adhesive bonding techniques [2], ceramics are widely used as restorative materials in dentistry. In parallel, advances in dental CAD/CAM (computerized aided design and computerized aided manufacturing) technologies [3] have catalyzed the developments of the aesthetical ceramic restorations with superior mechanical properties [4,5]. From a mechanical point of view, the possibility to program the thickness of the bonding joint, associated with the precision machining, provides optimization for the accommodation of...
Source: Dental Materials - May 21, 2018 Category: Materials Science Authors: H. Xia, P. Picart, S. Montresor, R. Guo, J.C. Li, O. Yusuf Solieman, J.-C. Durand, M. Fages Source Type: research

Effect of selective carious tissue removal on biomechanical behavior of class II bulk-fill dental composite restorations
Dental caries must be treated by managing patient risk factors to prevent the development of new lesions and, if caries lesions are not prevented, to arrest and repair early lesions [1,2]. When caries lesions become cavitated, restorative procedures are necessary to facilitate plaque control, protect the dentin-pulp complex, and restore the form, function, and esthetics of teeth [3,4]. Non-selective carious dentin removal has long been advocated prior to insertion of restorative materials to avoid any possible deleterious effects of the remaining carious tissue on the longevity of the restoration [5]. (Source: Dental Materials)
Source: Dental Materials - May 21, 2018 Category: Materials Science Authors: Paula Fernanda Damasceno Silva, Lais Rani Sales Oliveira, Stella Sueli Louren ço Braga, Cácia Signori, Steve R. Armstrong, Carlos José Soares, Maximiliano Sérgio Cenci, André Luis Faria-e-Silva Source Type: research

Synthesis of silver-containing calcium aluminate particles and their effects on a MTA-based endodontic sealer
Properties of root canal sealers have an impact on the quality of root canal filling and subsequently on the endodontic outcome [1]. These materials should present adequate physicochemical properties, such as setting time, radiopacity, flow, water sorption and solubility. Ideal sealers also would have antimicrobial properties and stimulate the repair of the affected periapical tissues [2]. Many materials are currently used as root canal sealers, including zinc oxide –eugenol, calcium hydroxide, glass-ionomer, silicone, polymer resins [1,3] and more recently, calcium silicate [4,5]. (Source: Dental Materials)
Source: Dental Materials - May 19, 2018 Category: Materials Science Authors: Luiza Helena S. Almeida, Rafael R. Moraes, Renata D. Morgental, S érgio S. Cava, Wellington Luiz O. Rosa, Patrícia Rodrigues, Anderson S. Ribeiro, Marcus Só, Fernanda G. Pappen Source Type: research

Biodegradation of resin –dentin interfaces is dependent on the restorative material, mode of adhesion, esterase or MMP inhibition
Resin-based restorations are the most popular restorative materials in dentistry in large part due to their aesthetic properties, handling characteristics and modern adhesive technologies. While providing several beneficial properties, higher failure rates and more frequent replacements have been reported for resin-based restorations over amalgam [1,2]. One of the primary reasons ( ∼70%) for composite restoration replacements is recurrent or secondary caries that develop at the compromised restoration–tooth interfacial margins [2–8]. (Source: Dental Materials)
Source: Dental Materials - May 19, 2018 Category: Materials Science Authors: Bo Huang, Dennis G. Cvitkovitch, J. Paul Santerre, Yoav Finer Source Type: research

Fatigue failure load of an adhesively-cemented lithium disilicate glass-ceramic: Conventional ceramic etching vs etch & prime one-step primer
The long-term success of indirect ceramic restorations in Restorative Dentistry substantially depends on achieving an adequate adhesion to the substrates (remaining tooth structure and restorative materials) [1]. An enhancement of the stress distribution (occlusal forces transmissions) is consequently provided through the restorative assembly, increasing its ability to support the challenges involved in the oral environment [2]. (Source: Dental Materials)
Source: Dental Materials - May 19, 2018 Category: Materials Science Authors: Mait ê Munhoz Scherer, Catina Prochnow, Andressa Borin Venturini, Gabriel Kalil Rocha Pereira, Thiago Augusto de Lima Burgo, Marília Pivetta Rippe, Luiz Felipe Valandro Source Type: research

Promoting porcelain –zirconia bonding using different atmospheric pressure gas plasmas
With its renowned strength and stability, yttria-stabilized tetragonal zirconia (YTZ) has been recognized as a suitable material to fabricate anterior and posterior dental prostheses. The evolution of CAD –CAM technologies has overcome the design and manufacturing limits of YTZ and expanded its applications [1]. Contemporary all-ceramic prostheses are composed of zirconia copings and various veneering porcelain to support the chewing functions and esthetic appearance. Although the bilayer YTZ resto rations have achieved acceptable clinical outcomes, they revealed higher failure rates compared to metal-ceramic counter...
Source: Dental Materials - May 18, 2018 Category: Materials Science Authors: Yi-Chuan Liu, Jung-Pei Hsieh, Yung-Chung Chen, Li-Li Kang, Chii-Shyang Hwang, Shu-Fen Chuang Source Type: research

Stability and reactivity of γ-ΜPTMS silane in some commercial primer and adhesive formulations
To evaluate the stability and reactivity of γ-methacryloxypropyl trimethoxysilane (MPTMS) in commercially available primers and adhesives. (Source: Dental Materials)
Source: Dental Materials - May 18, 2018 Category: Materials Science Authors: Maria Dimitriadi, Angeliki Panagiotopoulou, Maria Pelecanou, Konstantina Yannakopoulou, George Eliades Source Type: research

Fluoride containing bioactive glass composite for orthodontic adhesives — Apatite formation properties
Bioactive glasses (BAGs) were first used in dentistry for the treatment of bony defects [1]. This material was further developed as a commercial dentifrice to treat teeth with dentine hypersensitivity and enamel demineralisation [2]. The reduction of dentine hypersensitivity occurs by occluding exposed dentinal tubules with apatite formation using a calcium-sodium-phospho-silicate glass. Remineralisation of small enamel defects caused by acid erosion or caries is enhanced through the release of calcium and phosphate ions [3,4]. (Source: Dental Materials)
Source: Dental Materials - May 17, 2018 Category: Materials Science Authors: N.A. Al-eesa, A. Johal, R.G. Hill, F.S.L. Wong Source Type: research

In vitro assessment of ribose modified two-step etch-and-rinse dentine adhesive
Collagen fibrils aid in anchoring resin composite restorations to the dentine substrate. The aim of the study was to investigate effect of non-enzymatic glycation on bond strength and durability of demineralized dentine specimens in a modified two-step etch-and-rinse dentine adhesive. (Source: Dental Materials)
Source: Dental Materials - May 17, 2018 Category: Materials Science Authors: U. Daood, J.K.H. Tsoi, P. Neelakantan, J.P. Matinlinna, H.A.K. Omar, M. Al-Nabulsi, A.S. Fawzy Source Type: research

Translucency thresholds for dental materials
The increased demand of patients for highly esthetic restorations has driven the development of dental materials with suitable optical properties. Translucency is an important property of dental tissues and materials. Thus, an appropriate determination and communication of optical properties should include translucency, in addition to more popular parameters such as: lightness (L*), a* and b* (CIELAB coordinates), hue angle (h °) and chroma (C*). (Source: Dental Materials)
Source: Dental Materials - May 12, 2018 Category: Materials Science Authors: Marianne Salas, Cristina Lucena, Luis Javier Herrera, Ana Yebra, Alvaro Della Bona, Mar ía M. Pérez Source Type: research

Editorial Board
(Source: Dental Materials)
Source: Dental Materials - May 10, 2018 Category: Materials Science Source Type: research

In-vitro subsurface remineralisation of artificial enamel white spot lesions pre-treated with chitosan
To test the null hypothesis that chitosan application has no impact on the remineralisation of artificial incipient enamel white spot lesions (WSLs). (Source: Dental Materials)
Source: Dental Materials - May 8, 2018 Category: Materials Science Authors: Jing Zhang, Victoria Boyes, Frederic Festy, Richard J.M. Lynch, Timothy F. Watson, Avijit Banerjee Source Type: research

Synthesis and characterization of a new methacrylate monomer derived from the cashew nut shell liquid (CNSL) and its effect on dentinal tubular occlusion
Hypersensitive dentin (DH) is a common oral health issue in the adult population, associated with exposed cervical dentin and characterized by short and sharp pain in response to several external stimuli [1,2]. This significant increase in the dentin sensitivity is explained by the most widely accepted “hydrodynamic theory” proposed by Brännström et al. [3]. Such explanation advocates that movements of fluid within the dentinal tubules stimulate pulpal mechanoreceptors, which are interpreted as pain. (Source: Dental Materials)
Source: Dental Materials - May 8, 2018 Category: Materials Science Authors: Madiana Magalh ães Moreira, Lucas Renan Rocha da Silva, Talita Arrais Daniel Mendes, Sérgio Lima Santiago, Selma Elaine Mazzetto, Diego Lomonaco, Victor Pinheiro Feitosa Source Type: research

Evaluation of early resin luting cement damage induced by voids around a circular fiber post in a root canal treated premolar by integrating micro-CT, finite element analysis and fatigue testing
Fiber posts have been used to restore endodontically treated teeth with insufficient coronal tooth structure to retain a core for the definitive restoration [1,2]. Clinical studies have demonstrated high success rates without the occurrence of root fractures owing to fiber posts that have a similar elastic modulus to that of dentin reducing stress transmission to the root. Possible root fractures are thus avoided [1,3 –6]. However, the most frequent cause of failure in teeth reconstructed with fiber posts involve post debonding, which can occur at the post-cement (resin luting material) interface and/or between the c...
Source: Dental Materials - May 7, 2018 Category: Materials Science Authors: Yen-Hsiang Chang, Hsuan-Wen Wang, Pei-Hsun Lin, Chun-Li Lin Source Type: research

Fracture loads and failure modes of customized and non-customized zirconia abutments
The use of zirconia abutments for dental implants in oral rehabilitation is increasing because of their superior biocompatibility and aesthetics. When a metallic abutment is used and the gingival tissue is thin [1], thus permitting light transmission [2,3], the gingival tissue would appear dark gray due to the underlying metallic abutment. This can be avoided by using ceramic abutments, which will help to achieve gingival appearance similar to that with natural teeth, especially in the anterior region [4]. (Source: Dental Materials)
Source: Dental Materials - May 5, 2018 Category: Materials Science Authors: Izabela Cristina Maur ício Moris, Yung-Chung Chen, Adriana Cláudia Lapria Faria, Ricardo Faria Ribeiro, Alex Sui-Lun Fok, Renata Cristina Silveira Rodrigues Source Type: research

Challenges in luting fibre posts: Adhesion to the post and to the dentine
The failure pattern of adhesively-luted fibre posts differs from that of metal posts: whereas fibre posts often fail due to debonding, metal posts often cause root fracture [1 –3]. Thus, debonding of adhesively-luted posts has been reported to represent 37% of all failure modes [4,5]. In order to minimize such failures, efficient adhesion to two distinct substrates is required: (1) to the surface of the post and (2) to the dentine of the root canal. (Source: Dental Materials)
Source: Dental Materials - May 1, 2018 Category: Materials Science Authors: Adriana Lemos Mori Ubaldini, Ana Raquel Benetti, Francielle Sato, Renata Corr êa Pascotto, Antonio Medina Neto, Mauro Luciano Baesso, Anne Peutzfeldt Source Type: research

Chemical interaction of glycero-phosphate dimethacrylate (GPDM) with hydroxyapatite and dentin
Although the functional monomer glycero-phosphate dimethacrylate (GPDM) has since long been used in several dental adhesives and more recently in self-adhesive composite cements and restoratives, its mechanism of chemical adhesion to hydroxyapatite (HAp) is still unknown. We therefore investigated the chemical interaction of GPDM with HAp using diverse chemical analyzers and ultra-structurally characterized the interface of a GPDM-based primer formulation with dentin. (Source: Dental Materials)
Source: Dental Materials - April 28, 2018 Category: Materials Science Authors: Kumiko Yoshihara, Noriyuki Nagaoka, Satoshi Hayakawa, Takumi Okihara, Yasuhiro Yoshida, Bart Van Meerbeek Source Type: research

Hygroscopic expansion of self-adhesive resin cements and the integrity of all-ceramic crowns
Low pH neutralization and subsequent remnant hydrophilicity can lead to hygroscopic expansion of self-adhesive resin cements (SARCs) after water storage. The aim of this in vitro study was to investigate the effects of hygroscopic expansion of SARCs, used as luting and partial core build-up material, on integrity and cement gap thickness increase of all-ceramic CAD/CAM crowns. (Source: Dental Materials)
Source: Dental Materials - April 27, 2018 Category: Materials Science Authors: Magdalena Kirsten, Ragai Edward Matta, Renan Belli, Ulrich Lohbauer, Manfred Wichmann, Anselm Petschelt, Jos é Zorzin Source Type: research

In vitro and in vivo studies of anti-bacterial copper-bearing titanium alloy for dental application
Titanium (Ti) and its alloys are extensively applied in clinic as preferred metallic medical materials due to their excellent combination of mechanical properties, corrosion resistance and biocompatibility [1]. However, titanium and its alloys are inert materials in biological environment, i.e., they have less bioactive functions, such as antimicrobial activity, promotion of osteogenesis, etc. [2]. It has been known that the adherence and colonization of bacteria on the surface of implants can lead to formation of biofilm, a firm layer composed of bacteria with the secreted glycoproteins and polysaccharides, which can caus...
Source: Dental Materials - April 27, 2018 Category: Materials Science Authors: Rui Liu, Yulong Tang, Lilan Zeng, Ying Zhao, Zheng Ma, Ziqing Sun, Liangbi Xiang, Ling Ren, Ke Yang Source Type: research

Editorial Board
(Source: Dental Materials)
Source: Dental Materials - April 26, 2018 Category: Materials Science Source Type: research

Does the size matter? Evaluation of effect of incorporation of silver nanoparticles of varying particle size on the antimicrobial activity and properties of irreversible hydrocolloid impression material
Irreversible hydrocolloid impression materials are widely used in dentistry to record preliminary impressions of dentulous and partially dentulous mouths. Traditionally, it is supplied as a powder comprising soluble alginate, calcium sulfate and sodium phosphate as primary reactive ingredients along with diatomaceous earth as filler. Upon mixing with water, gelation reaction occurs between soluble alginate and calcium sulfate leading to the formation of calcium alginate gel [1 –3]. (Source: Dental Materials)
Source: Dental Materials - April 26, 2018 Category: Materials Science Authors: Kishore Ginjupalli, Tushar Shaw, Chaitanya Tellapragada, Ramakrishna Alla, Lokendra Gupta, Nagaraja Upadhya Perampalli Source Type: research

Does translucency influence cure efficiency and color stability of resin-based composites?
To determine if material ’s translucency influences the cure efficiency and color stability of resin-based composites (RBCs). (Source: Dental Materials)
Source: Dental Materials - April 25, 2018 Category: Materials Science Authors: Vin ícius Esteves Salgado, Guilherme Ferreira Rego, Luis Felipe Schneider, Rafael Ratto de Moraes, Larissa Maria Cavalcante Source Type: research

FE analysis of conceptual hybrid composite endodontic post designs in anterior teeth
To assess conceptual designs of dental posts consisting of polyetherimide (PEI) reinforced with carbon (C) and glass (G) glass fibers in endodontically treated anterior teeth. (Source: Dental Materials)
Source: Dental Materials - April 24, 2018 Category: Materials Science Authors: Antonio Gloria, Saverio Maietta, Massimo Martorelli, Antonio Lanzotti, David C. Watts, Pietro Ausiello Source Type: research

Effect of hydration and crack orientation on crack-tip strain, crack opening displacement and crack-tip shielding in elephant dentin
The crack-resistance of dentin, as the major constituent of teeth and tusk, is a subject of considerable biomechanical interest. The resistance of a material to crack propagation (its fracture toughness) is related to intrinsic and extrinsic toughening mechanisms. Extrinsic toughening mechanisms operate primarily behind the crack tip by introducing crack-tip shielding, which reduces the local stress intensity actually experienced at the crack tip. Intrinsic toughening mechanisms operate ahead of the crack tip and contribute to the material's inherent resistance to crack growth [1]. (Source: Dental Materials)
Source: Dental Materials - April 21, 2018 Category: Materials Science Authors: Xuekun Lu, Shelley D. Rawson, Philip J. Withers Source Type: research

Antibacterial quaternary ammonium compounds in dental materials: A systematic review
Quaternary ammonium compounds (QACs) represent one of the most effective classes of disinfectant agents in dental materials and resin nanocomposites. This reviews aims to give a wide overview on the research in the field of antibacterial QACs in dental materials and nanocomposites. (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Pooyan Makvandi, Rezvan Jamaledin, Mostafa Jabbari, Nasser Nikfarjam, Assunta Borzacchiello Source Type: research

Antibacterial photocatalytic activity of different crystalline TiO2 phases in oral multispecies biofilm
Despite the evidence of excellent dental implant therapy results, peri-implant mucositis and peri-implantitis disease can still occur if pathogenic bacteria accumulate on the implant surface and its components, such as abutments [1]. While peri-implant mucositis is characterized by inflammatory soft tissue infiltrate around the implant, peri-implantitis presents signs of inflammation combined with bone loss around osseointegrated implants [2]. According to a recent meta-analysis study, the overall prevalence of peri-implant mucosistis can be as high as 43%, while peri-implantitis prevalence is around 22% [3]. (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Heloisa N. Pantaroto, Antonio P. Ricomini-Filho, Martinna M. Bertolini, Jos é H.D. Silva, Nilton F. Azevedo Neto, Cortino Sukotjo, Elidiane C. Rangel, Valentim A.R. Barão Source Type: research

Chairside CAD/CAM materials. Part 3: Cyclic fatigue parameters and lifetime predictions
Clinical indications of dental restorative materials are traditionally based on their mechanical strength, by relating experimental fracture loads to load ranges occurring intraorally. This concept is flawed in many aspects [1], yielding very arbitrary safety limits for clinical fracture. Also, ranking materials according to their strength as means to predict clinical performance disregards important underlying chemical and mechanical fatigue degradation processes that take place in the oral environment. (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Michael Wendler, Renan Belli, Diana Valladares, Anselm Petschelt, Ulrich Lohbauer Source Type: research

Correlation of ultrasound microscopy and Vickers hardness measurements of human dentin and enamel — A pilot study
To investigate if Vickers microhardness of dentin and enamel correlated with acoustic velocity c(l) or acoustic reflection from the sample ’s top (amplitude). (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Mareike Warkentin, Cora Freyse, Olaf Specht, Detlef Behrend, Reinhard Maletz, Ralf Janda, Peter Ottl Source Type: research

Antibacterial quaternary ammonium compounds in dental materials: A systematic review
Quaternary ammonium compounds (QACs) represent one of the most effective classes of disinfectant agents in dental materials and resin nanocomposites. This reviews aims to give a wide overview on the research in the field of antibacterial QACs in dental materials and nanocomposites. (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Pooyan Makvandi, Rezvan Jamaledin, Mostafa Jabbari, Nasser Nikfarjam, Assunta Borzacchiello Source Type: research

Antibacterial photocatalytic activity of different crystalline TiO2 phases in oral multispecies biofilm
Despite the evidence of excellent dental implant therapy results, peri-implant mucositis and peri-implantitis disease can still occur if pathogenic bacteria accumulate on the implant surface and its components, such as abutments [1]. While peri-implant mucositis is characterized by inflammatory soft tissue infiltrate around the implant, peri-implantitis presents signs of inflammation combined with bone loss around osseointegrated implants [2]. According to a recent meta-analysis study, the overall prevalence of peri-implant mucosistis can be as high as 43%, while peri-implantitis prevalence is around 22% [3]. (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Heloisa N. Pantaroto, Antonio P. Ricomini-Filho, Martinna M. Bertolini, Jos é H.D. Silva, Nilton F. Azevedo Neto, Cortino Sukotjo, Elidiane C. Rangel, Valentim A.R. Barão Source Type: research

Chairside CAD/CAM materials. Part 3: Cyclic fatigue parameters and lifetime predictions
Clinical indications of dental restorative materials are traditionally based on their mechanical strength, by relating experimental fracture loads to load ranges occurring intraorally. This concept is flawed in many aspects [1], yielding very arbitrary safety limits for clinical fracture. Also, ranking materials according to their strength as means to predict clinical performance disregards important underlying chemical and mechanical fatigue degradation processes that take place in the oral environment. (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Michael Wendler, Renan Belli, Diana Valladares, Anselm Petschelt, Ulrich Lohbauer Source Type: research

Correlation of ultrasound microscopy and Vickers hardness measurements of human dentin and enamel — A pilot study
To investigate if Vickers microhardness of dentin and enamel correlated with acoustic velocity c(l) or acoustic reflection from the sample ’s top (amplitude). (Source: Dental Materials)
Source: Dental Materials - April 17, 2018 Category: Materials Science Authors: Mareike Warkentin, Cora Freyse, Olaf Specht, Detlef Behrend, Reinhard Maletz, Ralf Janda, Peter Ottl Source Type: research

Fractographic analyses of failed one-piece zirconia implant restorations
Promising results of initial clinical trials with yttria-stabilized zirconia have led to more extensive use of zirconia in dental implant superstructures. The applications have extended to abutments and complex individually designed crown-abutment one-piece structures. Little is known about their clinical success and the primary cause of failures. (Source: Dental Materials)
Source: Dental Materials - April 16, 2018 Category: Materials Science Authors: Marit Øilo, Dwayne Arola Source Type: research

Triethylene glycol dimethacrylate impairs bioenergetic functions and induces oxidative stress in mitochondria via inhibiting respiratory Complex I
Dental composite resins are commonly used to restore structural tooth damages. The development of resin-based composites (RBCs) has resulted in esthetically pleasing and long lasting dental restorations [1]. Recently, biocompatibility of the filling materials has become a clinically relevant issue [2]. Most RBCs contain strongly viscous major monomers and co-monomers of lower viscosity such as triethylene glycol dimethacrylate (TEGDMA) [3 –5]. Incomplete RBC polymerization may lead to an undesired leaching of the monomers into the oral tissues [6,7]. (Source: Dental Materials)
Source: Dental Materials - April 16, 2018 Category: Materials Science Authors: Krisztina Mikul ás, Péter Hermann, István Gera, Timea Komlódi, Gergő Horváth, Attila Ambrus, László Tretter Source Type: research