Effect of water and artificial saliva on mechanical properties of some denture-base materials

This study investigates a wide range of clinically relevant mechanical properties of poly(methyl methacrylate) (PMMA) denture base materials modified with di-methyl itaconate (DMI) and di-n-butyl itaconate (DBI) in order to compare them to a commercial PMMA denture base material. The commercial denture base formulation was modified with DMI and DBI by replacing up to 10 wt% of methyl methacrylate (MMA) monomer. The specimens were prepared by standard bath curing process. The influence of the itaconate content on hardness, impact strength, tensile, and thermal and dynamic mechanical properties was investigated. It is found that the addition of di-n-alkyl itaconates gives homogenous blends that show decreased glass transition temperature, as well as decrease in storage modulus, ultimate tensile strength, and impact fracture resistance with increase in the itaconate content. The mean values of surface hardness show no significant change with the addition of itaconates. The magnitude of the measured values indicates that the poly(methyl methacrylate) (PMMA) denture base material modified with itaconates could be developed into a less toxic, more environmentally and patient friendly product than commercial pure PMMA denture base material.

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Aplicabilidade dos sistemas CAD/CAM em Prótese Total: revisão de literatura

ARCHIVES OF HEALTH INVESTIGATION ◽

10.21270/archi.v7i11.3030 ◽

2019 ◽

Vol 7 (11) ◽

Author(s):

Caroline Costa Tavares ◽

Julliana Cariry Palhano Freire ◽

Stéphanie Cariry Palhano Freire ◽

Eduardo Dias-Ribeiro ◽

André Ulisses Dantas Batista

Keyword(s):

Mechanical Properties ◽

Complete Denture ◽

Complete Dentures ◽

Residual Monomer ◽

Denture Base ◽

Base Materials ◽

Removable Denture ◽

Computer Aided ◽

Cad Cam ◽

Dent Assoc

Introdução: A tecnologia CAD/CAM possui múltiplas aplicações protéticas, incluindo a prótese total. Objetivos: realizar uma revisão de literatura sobre a aplicabilidade dos sistemas CAD/CAM na fabricação de próteses totais, a fim de elucidar as propriedades das próteses confeccionadas através dessa tecnologia e as características desse sistema. Metodologia: A busca por artigos científicos que contemplassem o tema foi realizada através das bases de dados PUBMED e SCIELO, sem restrição de período. Foi feita a análise dos títulos e resumos e em seguida o acesso ao texto completo. Resultados: Dentre as características do sistema CAD/CAM, os estudos citaram menor necessidade de consultas e tempo clínico. É preciso conhecimento da tecnologia pelo cirurgião-dentista e o maior custo laboratorial é uma das desvantagens de sua utilização. Quanto às propriedades, observa-se a redução da rugosidade e porosidade, assim como da adesão de Candida albicans à base da prótese e teor de monômero residual. Maior dureza de superfície é verificada em comparação com as próteses totais convencionais. Conclusão: Menor número de consultas e tempo clínico são características do uso do sistema CAD/CAM em prótese total. Maior dureza da prótese e redução da rugosidade, porosidade, adesão de C. albicanse do teor de monômero residual são propriedades que as próteses totais apresentam quando confeccionadas por essa tecnologia.Descritores: Odontologia; Prótese Total; Projeto Auxiliado por Computador.ReferênciasAlbero A, Pacual A, Camps I, Grau-Benitez M. Comparative characterization of a novel cad-cam polymer-infiltrated-ceramic-network. J Clin Exp Dent. 2015;7(4):e495-500.Janeva N, Kovacevska G, Janev E. Complete Dentures Fabricated with CAD/CAM Technology and a Traditional Clinical Recording Method. Open Access Macedonian Journal of Medical Sciences. 2017;5(6):785-89.Baba NZ, Alrumaih HS, Goodacre BJ, Goodacre CJ. Current techniques in CAD/CAM denture fabrication. Gen Dent. 2016;64(6):23-8.Alamari MR. The influence of polishing techniques on pre-polymerized CAD/CAM acrylic resin denture bases. Electronic Physician. 2017;9(10):5452-58.Steinmassl PA, Klaunzer F, Steinmassi O, Dumfahrt H, Grunert I. Evaluation of Currently Available CAD/CAM Denture Systems. Int J Prosthodont. 2017;30(2):116-22.de Mendonça AF, Furtado de Mendonça M, White GS, Sara G, Littlefair D. Total CAD/CAM Supported Method for Manufacturing Removable Complete Dentures. Case Reports in Dentistry. 2016;2016:1259581.Mclaughlin JB, Ramos VJr. Complete denture fabrication with CAD/CAM record bases. J Prosthet Dent. 2015;114(4):493-97.Schweiger J, Guth JF, Edelhoff D, Stumbaum J. Virtual evaluation for CAD-CAM-fabricated complete dentures. J Prosthet Dent. 2017;117(1):28-33.Liu PR, Essig ME. Panorama of dental CAD/CAM restorative systems. Compend Contin Educ Dent. 2008; 29:482, 4, 6-8 passim.Giordano R. Materials for chairside CAD/CAM-produced restorations. J Am Dent Assoc. 2006;137(Suppl):14S-21S.Bilgin MS, Baytaroglu EN, Erdem A, Dilber E. A review of computer-aided design/computer-aided manufacture techniques for removable denture fabrication. European Journal of Dentistry. 2016;10(2):286-91.Maeda Y, Minoura M, Tsutsumi S, Okada M, Nokubi T. A CAD/CAM system for removable denture. Part I: Fabrication of complete dentures. Int J Prosthodont. 1994;7:17–21.Di Giacomo GA, Cury PR, de Araujo NS, Sendyk WR, Sendyk CL. Clinical application of stereolithographic surgical guides for implant placement: Preliminary results. J Periodontol. 2005;76:503–7.Ucar Y, Akova T, Aysan I. Mechanical properties of polyamide versus different PMMA denture base materials. J Prosthodont. 2012;21(3):173–6.Lee HJ, Kim CW, Kim YS. The level of residual monomer in injection molded denture base materials. J Korean Acad Prosth. 2003;41(3):360–8.Kattadiyil MT, Goodacre CJ, Baba NZ. CAD/CAM complete dentures: a review of two commercial fabrication systems. J Calif Dent Assoc. 2013;41(6):407–16.Consani RLX, Pucciarelli MGR, Mesquita MF, Nogueira MC, Barao VA. Polymerisation cycles on hardness and surface gloss of denture base. Int J Contemp Dent Med Rev. 2014;2014:1–6.Nakayama M, Takagi N. Methods for manufacturing dental resin block. US:2016.Murakami N, Wakabayashi N, Matsushima R, Kishida A, Igarashi Y. Effect of high-pressure polymerization on mechanical properties of PMMA denture base resin. J Mech Behav Biomed Mater. 2013;20:98-104.Al-Fouzan AF, Al-Mejarad Lamya A, Albarrag AM. Adherence of Candida to complete denture surfaces in vitro: A comparison of conventional and CAD/CAM complete dentures. J Adv Prosthodont. 2017;9(5):402-8.Digholkar S, Madhav VN, Palaskar J. Evaluation of the flexural strength and microhardness of provisional crown and bridge materials fabricated by different methods. J Indian Prosthodont Soc. 2016;16(4):328-34.Ayman AD. The residual monomer content and mechanical properties of CAD\CAM resins used in the fabrication of complete dentures as compared to heat cured resins. Electron Physician. 2017;9(7):4766-72.

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The effect of preparation conditions of acrylic denture base materials on the level of residual monomer, mechanical properties and water absorption

Journal of Dentistry ◽

10.1016/0300-5712(94)00002-w ◽

1995 ◽

Vol 23 (5) ◽

pp. 313-318 ◽

Cited By ~ 100

Author(s):

A. Doǧan ◽

B. Bek ◽

N.N. Çevik ◽

A. Usanmaz

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Residual Monomer ◽

Denture Base ◽

Preparation Conditions ◽

Base Materials

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Impact of Packing and Processing Technique on Mechanical Properties of Acrylic Denture Base Materials

Materials ◽

10.3390/ma8052093 ◽

2015 ◽

Vol 8 (5) ◽

pp. 2093-2109 ◽

Cited By ~ 6

Author(s):

Touraj Nejatian ◽

Farshid Sefat ◽

Tony Johnson

Keyword(s):

Mechanical Properties ◽

Processing Technique ◽

Denture Base ◽

Base Materials

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Studying the Mechanical Properties of Denture Base Materials Fabricated from Polymer Composite Materials

Al-Khwarizmi Engineering Journal ◽

10.22153/https://doi.org/10.22153/kej.2018.01.006 ◽

2018 ◽

Vol 14 (3) ◽

pp. 100-111 ◽

Cited By ~ 3

Author(s):

Jawad Kadhim Oleiwi ◽

Qahtan Adnan Hamad

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Polymer Composite ◽

Volume Fraction ◽

Mechanical Tests ◽

Polymer Composite Materials ◽

Resin Matrix ◽

Denture Base ◽

Base Materials ◽

Pmma Resin

In this research, the effect of adding two different types of reinforcing particles was investigated, which included: nano-zirconia (nano-ZrO2) particles and micro-lignin particles that were added with different volume fractions of 0.5%, 1%, 1.5% and 2% on the mechanical properties of polymer composite materials. They were prepared in this research, as a complete prosthesis and partial denture base materials was prepared, by using cold cure poly methyl methacrylate (PMMA) resin matrix. The composite specimens in this research consist of two groups according to the types of reinforced particles, were prepared by using casting methods, type (Hand Lay-Up) method. The first group consists of PMMA resin reinforced by (nano-ZrO2) particles, while the second group consists of PMMA resin reinforced by (micro-lignin) particles. The mechanical tests performed in this research includedtensile test, compression test, impact test and hardness test. The results of this study showed that the values of tensile modulus of elasticity, compressive strength and hardness properties increased with increasing the volume fraction of these particles in PMMA composite materials. While, the values of tensile strength, elongation and impact strength properties decreased. Also, the addition of (nano-ZrO2) particles showed greater effect than that of (micro-lignin) particles in some properties of PMMA composite materials for prosthesis denture base materials specimens, while they have lower effect for the other properties.

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