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 counterpart...
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
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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 cemen...
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
