Dergiler / Selcuk Dental Journal / 2018 / Cilt: 5 - Sayı: 1

Evaluation of the mechanical properties and residual monomer content of copolymer acrylic resins polymerized by different methods

Farklı yöntemlerle polimerize edilen kopolimer akrilik rezinlerin mekanik özelliklerinin ve artık monomer içeriğinin değerlendirilmesi

Sayfa
31–38
DOI
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However the process caused an increase in the residual monomer content of some resin groups.

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Amaç & Hipotez:Background: The aim of this study was to evaluate the effect of adding four different monomers on the flexural strength, elastic modulus, impact strength and residual monomer content of denture base resins polymerized by copolymerization mechanism.
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Temel Bulgular & Veri:Methods: Butyl methacrylate (BMA), Isobutyl mathacrylate (IBMA), 2-hydroxyethyl methacrylate (HEMA) and methacryl-polyhedral silses quioxane (POSS-MA) were added to monomers of conventional heat (HP) and microwave polymerized (MP) polymethyl methacrylate (PMMA) resin at the concentrations of 2%, 5% and 10% per volume.
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Sonuç & Katkı:However the process caused an increase in the residual monomer content of some resin groups.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Alan Parametreleri

Özet

Background: The aim of this study was to evaluate the effect of adding four different monomers on the flexural strength, elastic modulus, impact strength and residual monomer content of denture base resins polymerized by copolymerization mechanism. Methods: Butyl methacrylate (BMA), Isobutyl mathacrylate (IBMA), 2-hydroxyethyl methacrylate (HEMA) and methacryl-polyhedral silses quioxane (POSS-MA) were added to monomers of conventional heat (HP) and microwave polymerized (MP) polymethyl methacrylate (PMMA) resin at the concentrations of 2%, 5% and 10% per volume. The flexural strength, elastic modulus and impact strength of specimens were measured with an universal testing machine and Charpy-type impact tester. Residual monomer contents were determined by high performance liquid chromatography (HPLC) method. Results: 10% IBMA and 10% HEMA enhanced the flexural strength of HP resin. For the elastic modulus of MP resin, significant differences observed between the control group and 2 and 5% IBMA, 5 and 10% HEMA, and 5% POSS-MA groups (P<0.05). Copolymerization mechanism had no positive effect on the impact strength of denture base resins. Significant differences were observed between the residual monomer of control group and 10% IBMA, 10% BMA, 10% POSS-MA groups of HP resin (P<0.05). In MP resin group significant differences were observed between control group and 5% IBMA, 2-5-10% HEMA groups (P<0.05). Conclusion: Copolymerization process was effective on the flexural strength of HP denture base resin with 10% IBMA and 10 % HEMA. However the process caused an increase in the residual monomer content of some resin groups.

Abstract

Amaç: Bu çalışmanın amacı dört farklı monomer eklenerek kopolimerizasyon mekanizmasıyla polimerize olmuş protez kaide rezinlerinin bükülme dayanımı, elastik modulus, çarpma dayanımı ve artık monomer içeriğinin değerlendirilmesidir. Gereç ve Yöntemler: Bütil metakrilat (BMA), isobütil metakrilat (IBMA), 2-hidroksietil metakrilat (HEMA) ve metakril-polihedral silseskioksan (POSS-MA) hacimce %2, %5 ve %10 konsantrasyonlarında konvansiyonel ısı (HP) ve mikrodalga (MP) akrilik monomerlerine ilave edilmiştir. Universal test cihazı ve Charpy tip çarpma test cihazı ile örneklerin bükülme dayanımı, elastik modulusu ve çarpma dayanımı ölçülmüştür. Yüksek performanslı sıvı kromatografisi (HPLC) metoduyla artık monomer içerikleri belirlenmiştir. Bulgular: %10 IBMA ve %10 HEMA, HP rezinlerin bükülme dayanımını artırmıştır. MP rezin grubunun elastik modulusu için kontrol grubu ile %2 ve %5 IBMA, %5 ve %10 HEMA ve %5 POSS-MA grupları arasında anlamlı farklılıklar gözlenmiştir (P<0.05). Kopolimerizasyon mekanizmasının protez kaide rezinlerinin çarpma dayanımı üzerinde olumlu bir etkisi olmamıştır. HP rezin kontrol grubu ile % 10 IBMA, % 10 BMA, %10 POSS-MA grupları arasında artık monomer bakımından anlamlı farklılıklar saptanmıştır (P<0.05). MP rezinde ise kontrol grubu ile %5 IBMA ve %2-5-10 HEMA grupları arasında anlamlı farklılıklar gözlenmiştir (P<0.05). Sonuç: Kopolimerizasyon işlemi %10 IBMA ve %10 HEMA eklenmiş HP protez kaide rezinlerinin bükülme dayanımında etkili olmuştur. Bununla birlikte işlem, bazı rezin gruplarının artık monomer miktarında artışa neden olmuştur.

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Bu Makaleye Atıf Yap

KÖROĞLU, A., ŞAHİN, O., DEDE, D. Ö., ADIGÜZEL, Ş., HAZER, B. (2018). Evaluation of the mechanical properties and residual monomer content of copolymer acrylic resins polymerized by different methods. Selcuk Dental Journal, Cilt: 5 - Sayı: 1, 31–38. https://ajindex.com/articles/301741

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