scholarly journals Avaliação in vitro da resistência de duas resinas compostas submetidas a teste de compressão

2020 ◽  
Vol 8 (9) ◽  
Author(s):  
Mirla Lays Dantas de Almeida ◽  
Gymenna Maria Tenório Guênes ◽  
Luanna Abílio Diniz Melquiades de Medeiros ◽  
Mylena de Araújo Régis ◽  
Marcus Vinícius Lia Fook ◽  
...  
Keyword(s):  
Filler Content ◽  
State Of The Art ◽  
Resin Composite ◽  
Dental Materials ◽  
Santa Cruz ◽  
Porto Alegre ◽  
Composite State ◽  
Fernando Pessoa ◽  
Dent Assoc

Introdução: O aumento da demanda pela odontologia estética guiou o desenvolvimento de resinas compostas com melhores propriedades físicas e mecânicas. Por isso, percebe-se que há atualmente disponibilidade de uma grande variedade desse material. Dessa forma faz-se necessário a realização de estudos científicos acerca das resinas composta. Objetivo: Avaliar comparativamente, in vitro, à resistência de duas resinas compostas fotopolimerizáveis encontrados no mercado: a Filtek Z350 XT da 3M e a Zirconfill da Technw, após teste mecânico de compressão e análise estatística dos resultados. Material e método: Quatro amostras de cada resina composta foram submetidas ao teste de resistência à compressão numa máquina de ensaio universal. Os resultados foram analisados estatisticamente através do teste de Mann-Whitney com margem de erro 5.0%. Para digitar os dados e obter os cálculos estatísticos foi utilizado o programa IBM SPSS na versão 23. Resultados: A média da força foi mais elevada na resina Zirconfill do que na resina Z350; entretanto, a mediana foi mais elevada na resina Z350. Para a margem de erro fixada (5,0%) não há comprovação de diferença significativa (p > 0,05) entre as duas resinas em relação à força de resistência analisada. Conclusão: As resinas compostas testadas mostram valores de resistência a compressão semelhantes e não apresentam diferenças relevantes.Descritores: Resinas Compostas; Nanotecnologia; Odontologia.ReferênciasBowen RL. Use of epoxy resins in restorative materials. J Dent Res. 1956;35(3):360-69.Chagas LS. Avaliação da resistência flexural e módulo de elasticidade de uma resina do tipo Bulk Fill em comparação com uma resina convencional [monografia de conclusão de curso]. Santa Cruz do Sul: Universidade de Santa Cruz do Sul - UNISC; 2016.Behr M, Proff P, Kollbeck C, Langriegr S, Kunze J, Handel G et al. The bond strength of the resin-to-zirconia interface using diferente bonding concepts. J Mech Behav Biomed Mater. 2011;4(1):2-8.Rodrigues DS. Análise da porosidade, resistência mecânica e desgaste de cimentos de ionômero de vidro e resina composta [dissertação]. Porto: Faculdade de Ciências da Saúde, Universidade Fernando Pessoa; 2014.Pereira AFV, Miranda Junior WG. Avaliação in vitro da microinfiltração e adaptação marginal em restaurações classe v simulando lesões de abfração: estudo piloto. Arq Cent Estud Curso Odontol Univ Fed Minas Gerais. 2008;44(2):18-25.Ferracane JL. Resin composite – state of the art. Dent Mater. 2011; 27(1):29-38.Han JM, Lin H, Zheng G, Shinya A, Gomi H, Shinya A et al. Effect of nanofiller on wear resistance and surface roughness of resin composites. Chin J Dent Res. 2012;15(1):41-7.Mitra SB, Wu D, Holmes B. An application of nanotechnology in advanced dental materials. J Am Dent Assoc. 2003;134(10):1382-90.Mota EG, Weiss A, Spohr AM, Oshima HMS, Carvalho LMN. Relationship between filler content and selected mechanical properties of six microhybrid composites. Rev odonto cienc. 2011;26(2):151-55.Rosa RS. Propriedades mecânicas de resinas compostas com nanopartículas [tese]. Porto Alegre: Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia; 2010.Souza ALT, Oliveira FMMPC, Moysés MR, Assis CPD, Ribeiro JCR, Dias SC. Avaliação da resistência à compressão de resinas compostas fotopolimerizáveis. Arq Odontol. 2007;43(1):30-5.

scholarly journals Simulating the Intraoral Aging of Dental Bonding Agents: A Narrative Review

2022 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Tomas Vilde ◽  
Cameron A. Stewart ◽  
Yoav Finer
Keyword(s):  
Resin Composite ◽  
Dental Materials ◽  
Thermal Fluctuations ◽  
Narrative Review ◽  
Mechanical Degradation ◽  
Hybrid Layer ◽  
Bonding Agents ◽  
Dental Bonding

Despite their popularity, resin composite restorations fail earlier and at higher rates than comparable amalgam restorations. One of the reasons for these rates of failure are the properties of current dental bonding agents. Modern bonding agents are vulnerable to gradual chemical and mechanical degradation from a number of avenues such as daily use in chewing, catalytic hydrolysis facilitated by salivary or bacterial enzymes, and thermal fluctuations. These stressors have been found to work synergistically, all contributing to the deterioration and eventual failure of the hybrid layer. Due to the expense and difficulty in conducting in vivo experiments, in vitro protocols meant to accurately simulate the oral environment’s stressors are important in the development of bonding agents and materials that are more resistant to these processes of degradation. This narrative review serves to summarize the currently employed methods of aging dental materials and critically appraise them in the context of our knowledge of the oral environment’s parameters.

scholarly journals “Digitally Oriented Materials”: Focus on Lithium Disilicate Ceramics

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Fernando Zarone ◽  
Marco Ferrari ◽  
Francesco Guido Mangano ◽  
Renato Leone ◽  
Roberto Sorrentino
Keyword(s):  
Optical Properties ◽  
State Of The Art ◽  
Dental Materials ◽  
Lithium Disilicate ◽  
Mechanical Resistance ◽  
Success Rates ◽  
Digital Dentistry ◽  
Manufacturing Techniques

The present paper was aimed at reporting the state of the art about lithium disilicate ceramics. The physical, mechanical, and optical properties of this material were reviewed as well as the manufacturing processes, the results of in vitro and in vivo investigations related to survival and success rates over time, and hints for the clinical indications in the light of the latest literature data. Due to excellent optical properties, high mechanical resistance, restorative versatility, and different manufacturing techniques, lithium disilicate can be considered to date one of the most promising dental materials in Digital Dentistry.

Resin composite—State of the art

2011 ◽  
Vol 27 (1) ◽  
pp. 29-38 ◽  
Author(s):  
Jack L. Ferracane
Keyword(s):  
State Of The Art ◽  
Resin Composite ◽  
Composite State

scholarly journals Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry

2015 ◽  
Author(s):  
Rodrigo Maia ◽  
Rodrigo S Reis ◽  
Andre FV Moro ◽  
Cesar Perez ◽  
Bárbara Pessôa ◽  
...  
Keyword(s):  
Filler Content ◽  
Important Determinant ◽  
Dental Materials ◽  
Dental Practice ◽  
Polymerization Shrinkage ◽  
Depth Of Cure ◽  
Knoop Microhardness ◽  
Properties Of Materials ◽  
Restorative Dental Materials

Purpose: This study tested the null hypothesis that different classes of direct restorative dental materials (silorane-based resin, low-shrinkage and conventional (non-flowable and flowable) resin-based composite (RBC)) do not differ from each other with regard to polymerization shrinkage, depth of cure, or microhardness. Methods: 140 RBC samples were fabricated and tested by one calibrated operator. Polymerization shrinkage was measured using a gas pycnometer both before and immediately after curing with 36 J/cm2 light energy density. Depth of cure was determined, using a penetrometer and the Knoop microhardness was tested from the top surface to a depth of 5 mm. Results: Considering polymerization shrinkage, the authors found significant differences (p<0,05) between different materials: non-flowable RBCs showed lower values, compared to flowable RBCs, with the silorane-based resin presenting the smallest shrinkage. The low shrinkage flowable composite performed similarly to non-flowable, with significant statistical differences compared to the two other flowable RBCs. Regarding to depth of cure, low-shrinkage flowable RBC were most effective compared to other groups. Microhardness was generally higher for the non-flowable vs. flowable RBCs (p<0.05). However, the values for low-shrinkage flowable did not differ significantly from those of non-flowable, but were significantly higher than those of the other flowable RBCs. Clinical Significance: RBCs have undergone many modifications as they have evolved and represent the most relevant restorative materials in today’s dental practice. This study of low-shrinkage RBCs, conventional RBCs (non-flowable and flowable) and silorane-based composite – by in vitro evaluation of volumetric shrinkage, depth of cure and microhardness – reveals that although filler content is an important determinant of polymerization shrinkage, it is not the only variable that affects properties of materials that were tested in this study.

scholarly journals Coroa total de dente posterior em resina composta: relato de caso

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Bruno Firmino de Oliveira ◽  
José Henrique de Araújo Cruz ◽  
Douglas Benício Barros Henrique
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Sao Paulo ◽  
São Paulo ◽  
Dental Resin ◽  
Resin Cements ◽  
Composite State ◽  
Fernando Pessoa ◽  
Compression Properties ◽  
Clinical Considerations

Introdução: Dentes que passaram por tratamento endodôntico e que perderam parte da estrutura dentária devido cárie, geralmente, necessitam de retentores intrarradiculares para promover retenção. Os padrões estéticos atuais, que buscam um sorriso de cor natural e alinhado, ocorreram nos últimos anos devido rápida evolução no que se diz respeito às resinas compostas. Objetivo: Reunir todas as vantagens desses biomateriais para reabilitar, harmonicamente, um pré-molar superior. Relato de Caso: Paciente procurou atendimento odontológico Odontominas para tratamento endodôntico do elemento 25 e após conclui-lo realizar reabilitação estética com pino de fibra de vidro e resina composta em consenso com o paciente após planejamento. Respeitando o princípio de desobturação de 2/3 do canal radicular para inserção do pino com posterior reabilitação em resina composta, o pino foi cimentado com cimento resinoso Allcem dual na cor A2 FGM com auxílio do Lentulo Nº 35, após ser preparado e adaptado ao conduto radicular. Posteriormente, o núcleo de preenchimento foi confeccionado e acabado com ponta diamantada 2135F KG Sorense e condicionado com ácido fosfórico a 37% por 30 segundos, seguido do adesivo Single Bond 2 3M/ESPE e foto ativado por 30 segundos. A subsequente reconstrução coronária foi realizada com pequenos incrementos fotopolimerizando cada camada, com sistema de resinas Z350 3M/ESPE para dentinana cor A3 e esmalte na cor A2. O pré-acabamento, foi realizado com ponta diamantada 2135F KG Sorensen e discos tipo sof-lex 3M/ESPE. O polimento da restauração foi feito após 48 horas, ponta de polimento Pogo Disco Dentsply e pasta própria para polimento.Descritores: Materiais Dentários; Estética Dentária; Odontologia.ReferênciasBehr M, Proff P, Kolbeck C, Langriegr S, Kunze J, Handel G et al. The bond strength of the resin-to-zirconia interface using diferente bonding concepts. J Mech Behav Biomed Mater. 2011;4(1):2-8.Rodrigues DS. Análise da porosidade, resistência mecânica e desgaste de cimentos de ionômero de vidro e resina composta [dissertação]. Porto (Portugal): Faculdade de Ciências da Saúde, Universidade Fernando Pessoa;2014.Della-Bona A. Bonding to ceramics: scientific evidences for clinical dentistry. São Paulo: Artes Médicas;2009.Assunção DPO. Pinos intrarradiculares pré- fabricados de fibra de vidro. Piracicaba: Faculdade de Odontologia de Piracicaba UNICAMP;2011. Trabalho de Conclusão de Curso.Zogheib LV. Resistência à fratura de raízes fragilizadas restauradas com resina composta e pinos de fibra de vidro submetidas à ciclagem mecânica [dissertação]. Bauru: Faculdade de Odontologia USP; 2005.Barcellos CR, Silva FP, Carneiro RP, Borges MG, Pereira DA, Menezes MS. Reabilitação funcional e estética do sorriso: um relato de caso. Full dent. Sci. 2015;7(25):102-13.Alfredo E, de Souza ES, Marchesan MA, Paulino SM, Gariba-Silva R, Sousa-Neto MD. Effect of eugenol-based endodontic cement on the adheston of intra-canal posts. Braz Dent J. 2006;17(2):130-33.Reis BR, Soares PBF, Castro CG, Santos Filho PCF, Soares PV, Soares CJ. Uso de coroa em cerâmica pura associada a pino de fibra de vidro na reabilitação estética do sorriso: relato de caso. Rev Odontol Bras Central. 2010;19(50):262-69.Muniz L. Reabilitação estética em dentes tratados endodonticamente: pinos de fibra e possibilidades clínicas conservadores. São Paulo: Santos;2010.Menezes MS, Queiroz EC, Campos RE, Martins LR, Soares CJ. Influence of endodontic sealer cement on berglass post bond strength to root dentine. Int Endod J. 2008;41(6):476-84.Prakki A, Carvalho RM. Dual cure resin cements: characteristics ans clinical considerations. Pós-Grad Rev Fac Odontol São José dos Campos. 2001;4(1):21-6.Ferracane JL. Resin composite - state of the art. Dent Mater. 2011;27(1):29-38.Park JK, Lee GH, Kim JH, Park MG, Ko CC, Kim H et al. Polymerization shrinkage, flexural and compression properties of low-shrinkage dental resin composites. Dent Mater J. 2014;33(1):104-10.Schneider AC, Mendonça MJ, Rodrigues RB, Busato PMR, Camilotti V. Influência de três modos de fotopolimerização sobre a microdureza de três resinas compostas. Polímeros. 2016;26(Esp):37-42.Sousa LX, Cruz JHA, Melo WOS, Freire SCP, Ribeiro ED, Freire JCP.  Abfração dentária: um enfoque sobre a etiologia e o tratamento restaurador. Arch Health Invest. 2018;7(2):51-3.Cruz JHA, Silva RLB, Andrade-Júnior FP, Guênes GMT, Almeida MSC, Medeiros LADM et al. A importância da anatomia e escultura dental para prática de procedimentos clínicos odontológicos. RSC. 2018;7(1):76-85.

Silane Based Concepts on Bonding Resin Composite to Metals

2007 ◽  
Vol 8 (2) ◽  
pp. 1-8 ◽  
Author(s):  
Pekka K. Vallittu ◽  
Jukka P. Matinlinna
Keyword(s):  
Resin Composite ◽  
Surface Condition ◽  
Dental Materials ◽  
Silica Coating ◽  
Resin Composites ◽  
Metallic Materials ◽  
Surface Conditioning ◽  
Adhesion Promotion ◽  
Dental Professionals

Abstract Introduction The longevity of silane promoted adhesion of surface conditioned metallic materials is of concern in dentistry and poses both a functional and esthetic dilemma for the patient and dental professionals. Several methods for surface conditioning exist, but some are employed more frequently in clinical practice. Aim of the Review This overview aims to characterize and discuss the most commonly used surface conditioning methods based on silanization. The primary chemical features in silane treatment will also be presented. Method of Review The literature regarding silane utilization was systematically selected and 68 cited references published during 1967-2005 were reviewed. Technical descriptions of different silica-coating (silicatization) methods are presented and some comparative clinical and in vitro experiences are reported. Some other surface condition methods applied in dental laboratories were also selected for presentation. Conclusion It is concluded in this overview tribochemical silica-coating followed by a mandatory silane coupling agent application is a clinically proved, relevant adhesion promotion method to enhance the bonding of resin composites to metallic dental materials. Citation Matinlinna JP, Vallittu PK. Silane Based Concepts on Bonding Resin Composite to Metals. J Contemp Dent Pract 2007 February;(8)2:001-008.

scholarly journals Bibliometric Analysis of Composite Resin From 2000-2020

2021 ◽  
Author(s):  
Sultan Gizem Ülkü ◽  
Nimet Ünlü
Keyword(s):  
English Language ◽  
Composite Resin ◽  
Resin Composite ◽  
Citation Count ◽  
Dental Materials ◽  
Composite State ◽  
The Usa ◽  
Composite Resin Restorations ◽  
Number Of Publications ◽  
Resin Restorations

Introduction: To indentify the most effective actors(authors, countries, and journals) about composite resin restorations in the period 2000-2020.Material and Methods: An electronis research was conducted in the Scopus database by selecting the words &lsquo;composite resin&rsquo; and &lsquo;restoration and English language, article and review types, dentistry field. Their bibliometric data including publication title, authorship, citation count, citation dentistry, year of publication, country and institution of origin, journal of publication, study design, and keywords were extracted and analyzed.Results and Discussion: To our knowledge, this is the first bibliometric article on composite resin restorations. This study provides information about authors, institutions and countries that contribute to significant improvements in composite resin restorations. From 2000 to 2020, there were 7118 articles published from 99 countries.Articles originate primarily from the USA and Brazil. Results indicate that the USA, Brazil, Germany, Turkey, the United Kingdom, Japan, Swtizerland, Italy, Netherlands and India are the leading countries in composite resin restoration research and account for 51.8% of the total number of publications. The total number of citations are 158.404, corresponding to 22 citations per paper publication. During the time period examined, 776 hot articles and 228 classic articles on composite resin restorations were found.The journal with the most publications is &lsquo;Operative Dentistry&rsquo;. The publishing houses of the top 10 journals are from 4 countries: USA(6),Netherlands(2),Germany(1),Japan(1). The most cited article within the boundaires of this study is Ferracane&rsquo;s article titled &lsquo;Resin composite-State of the art&rsquo;, which was published in Dental Materials in 2011 and received 913 citations.

scholarly journals Properties evaluation of silorane, low-shrinkage, non-flowable and flowable resin-based composites in dentistry

2015 ◽  
Author(s):  
Rodrigo Maia ◽  
Rodrigo S Reis ◽  
Andre FV Moro ◽  
Cesar Perez ◽  
Bárbara Pessôa ◽  
...  
Keyword(s):  
Filler Content ◽  
Important Determinant ◽  
Dental Materials ◽  
Dental Practice ◽  
Polymerization Shrinkage ◽  
Depth Of Cure ◽  
Knoop Microhardness ◽  
Properties Of Materials ◽  
Restorative Dental Materials

Purpose: This study tested the null hypothesis that different classes of direct restorative dental materials (silorane-based resin, low-shrinkage and conventional (non-flowable and flowable) resin-based composite (RBC)) do not differ from each other with regard to polymerization shrinkage, depth of cure, or microhardness. Methods: 140 RBC samples were fabricated and tested by one calibrated operator. Polymerization shrinkage was measured using a gas pycnometer both before and immediately after curing with 36 J/cm2 light energy density. Depth of cure was determined, using a penetrometer and the Knoop microhardness was tested from the top surface to a depth of 5 mm. Results: Considering polymerization shrinkage, the authors found significant differences (p<0,05) between different materials: non-flowable RBCs showed lower values, compared to flowable RBCs, with the silorane-based resin presenting the smallest shrinkage. The low shrinkage flowable composite performed similarly to non-flowable, with significant statistical differences compared to the two other flowable RBCs. Regarding to depth of cure, low-shrinkage flowable RBC were most effective compared to other groups. Microhardness was generally higher for the non-flowable vs. flowable RBCs (p<0.05). However, the values for low-shrinkage flowable did not differ significantly from those of non-flowable, but were significantly higher than those of the other flowable RBCs. Clinical Significance: RBCs have undergone many modifications as they have evolved and represent the most relevant restorative materials in today’s dental practice. This study of low-shrinkage RBCs, conventional RBCs (non-flowable and flowable) and silorane-based composite – by in vitro evaluation of volumetric shrinkage, depth of cure and microhardness – reveals that although filler content is an important determinant of polymerization shrinkage, it is not the only variable that affects properties of materials that were tested in this study.

scholarly journals State-of-the-art methods and devices for generation, exposure, and collection of aerosols from e-vapor products

2020 ◽  
Vol 4 ◽  
pp. 239784732097975
Author(s):  
Stéphanie Boué ◽  
Didier Goedertier ◽  
Julia Hoeng ◽  
Anita Iskandar ◽  
Arkadiusz K Kuczaj ◽  
...  
Keyword(s):  
Ad Hoc ◽  
State Of The Art ◽  
Physicochemical Characterization ◽  
Objective Evaluation ◽  
Vapor Generation ◽  
Characterization Methods ◽  
Clinical Exposure ◽  
Aerosol Generation

E-vapor products (EVP) have become popular alternatives for cigarette smokers who would otherwise continue to smoke. EVP research is challenging and complex, mostly because of the numerous and rapidly evolving technologies and designs as well as the multiplicity of e-liquid flavors and solvents available on the market. There is an urgent need to standardize all stages of EVP assessment, from the production of a reference product to e-vapor generation methods and from physicochemical characterization methods to nonclinical and clinical exposure studies. The objective of this review is to provide a detailed description of selected experimental setups and methods for EVP aerosol generation and collection and exposure systems for their in vitro and in vivo assessment. The focus is on the specificities of the product that constitute challenges and require development of ad hoc assessment frameworks, equipment, and methods. In so doing, this review aims to support further studies, objective evaluation, comparison, and verification of existing evidence, and, ultimately, formulation of standardized methods for testing EVPs.

scholarly journals Effects of ionizing radiation on surface properties of current restorative dental materials

2021 ◽  
Vol 32 (6) ◽  
Author(s):  
Débora Michelle Gonçalves de Amorim ◽  
Aretha Heitor Veríssimo ◽  
Anne Kaline Claudino Ribeiro ◽  
Rodrigo Othávio de Assunção e Souza ◽  
Isauremi Vieira de Assunção ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Surface Properties ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Contact Angles ◽  
Glass Ionomer ◽  
Post Radiation ◽  
Restorative Dental Materials ◽  
Ionomer Cement

AbstractTo investigate the impact of radiotherapy on surface properties of restorative dental materials. A conventional resin composite—CRC (Aura Enamel), a bulk-fill resin composite—BFRC (Aura Bulk-fill), a conventional glass ionomer cement—CGIC (Riva self cure), and a resin-modified glass ionomer cement—RMGIC (Riva light cure) were tested. Forty disc-shaped samples from each material (8 mm diameter × 2 mm thickness) (n = 10) were produced according to manufacturer directions and then stored in water distilled for 24 h. Surface wettability (water contact angle), Vickers microhardness, and micromorphology through scanning electron microscopy (SEM) before and after exposition to ionizing radiation (60 Gy) were obtained. The data were statistically evaluated using the two-way ANOVA and Tukey posthoc test (p < 0.05). Baseline and post-radiation values of contact angles were statistically similar for CRC, BFRC, and RMGIC, whilst post-radiation values of contact angles were statistically lower than baseline ones for CGIC. Exposition to ionizing radiation statistically increased the microhardness of CRC, and statistically decreased the microhardness of CGIC. The surface micromorphology of all materials was changed post-radiation. Exposure to ionizing radiation negatively affected the conventional glass ionomer tested, while did not alter or improved surface properties testing of the resin composites and the resin-modified glass ionomer cement tested.

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