FARKLI YÖNTEMLERLE POLİMERİZE EDİLEN KOPOLİMER AKRİLİK REZİNLERİN MEKANİK ÖZELLİKLERİNİN VE ARTIK MONOMER İÇERİĞİNİN DEĞERLENDİRİLMESİ
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<.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<.05). MP
rezinde ise kontrol grubu ile %5 IBMA ve
%2-5-10 HEMA grupları arasında anlamlı farklılıklar gözlenmiştir (P<.05).
Sonuçlar: 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.
References
- American Dental Association (ADA), 1999. Specifications for denture base polymer number 12: 1999 (Reaffirmed 2008).
- Ayandele E, Sarkar B, Alexandridis P, 2012. Polyhedral oligomeric silsesquioxane (POSS)-containing polymer nanocomposites. Nanomaterials 2:445-75.
- Ayaz EA, Durkan R, Bagis B, 2013. The effect of acrylamide incorporation on the thermal and physical properties of denture resins. J Adv Prosthodont 5:110-7.
- Ayaz EA, Durkan R, 2013. Influence of acrylamide monomer addition to the acrylic denture-base resins on mechanical and physical properties. Int J Oral Sci 5:229-35.
- Azzarri MJ, Cortizo MS, Alessandrini JL, 2003. Effect of the curing conditions on the properties of an acrylic denture bas eresin microwave-polymerised. J Dent 31:463-8.
- Bartoloni JA, Murchison DF, Wofford DT, Sarkar NK, 2000. Degree of conversion in denture base materials for varied polymerization techniques. J Oral Rehabil 27:488-93.
- Clarke RL, 1989. Dynamic mechanical thermal analysis of dental polymers: III. Heterocyclic methacrylates. Biomaterials 10:630-3.
- Cunha TM, Regis RR, Bonatti MR, de Souza RF, 2009. Influence of incorporation of fluoroalkyl methacrylates on roughness and flexural strength of a denture base acrylic resin. J Appl Oral Sci 17:103-7.
- Çelebi N, Yüzügüllü B, Canay Ş, Yücel Ü, 2008. Effect of polymerization methods on the residual monomer level of acrylic resin denture base polymers. Polym Adv Technol 19:201-6.
- De Clerck JP, 1987. Microwave polymerization of acrylic resins used in dental prosthesis. J Prosthet Dent 57:650-8.
EVALUATION OF THE MECHANICAL PROPERTIES AND RESIDUAL MONOMER CONTENT OF COPOLYMER ACRYLIC RESINS POLYMERIZED BY DIFFERENT METHODS
Abstract
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 silsesquioxane
(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<.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<.05). In MP resin group significant
differences were observed between control group and 5% IBMA, 2-5-10% HEMA
groups (P<.05).
Conclusions: 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.
Keywords: Denture base
resin, copolymer, flexural strength, impact strength, residual monomer.
References
- American Dental Association (ADA), 1999. Specifications for denture base polymer number 12: 1999 (Reaffirmed 2008).
- Ayandele E, Sarkar B, Alexandridis P, 2012. Polyhedral oligomeric silsesquioxane (POSS)-containing polymer nanocomposites. Nanomaterials 2:445-75.
- Ayaz EA, Durkan R, Bagis B, 2013. The effect of acrylamide incorporation on the thermal and physical properties of denture resins. J Adv Prosthodont 5:110-7.
- Ayaz EA, Durkan R, 2013. Influence of acrylamide monomer addition to the acrylic denture-base resins on mechanical and physical properties. Int J Oral Sci 5:229-35.
- Azzarri MJ, Cortizo MS, Alessandrini JL, 2003. Effect of the curing conditions on the properties of an acrylic denture bas eresin microwave-polymerised. J Dent 31:463-8.
- Bartoloni JA, Murchison DF, Wofford DT, Sarkar NK, 2000. Degree of conversion in denture base materials for varied polymerization techniques. J Oral Rehabil 27:488-93.
- Clarke RL, 1989. Dynamic mechanical thermal analysis of dental polymers: III. Heterocyclic methacrylates. Biomaterials 10:630-3.
- Cunha TM, Regis RR, Bonatti MR, de Souza RF, 2009. Influence of incorporation of fluoroalkyl methacrylates on roughness and flexural strength of a denture base acrylic resin. J Appl Oral Sci 17:103-7.
- Çelebi N, Yüzügüllü B, Canay Ş, Yücel Ü, 2008. Effect of polymerization methods on the residual monomer level of acrylic resin denture base polymers. Polym Adv Technol 19:201-6.
- De Clerck JP, 1987. Microwave polymerization of acrylic resins used in dental prosthesis. J Prosthet Dent 57:650-8.
Details
| Primary Language | English |
|---|---|
| Subjects | Dentistry |
| Journal Section | Research |
| Authors | |
| Publication Date | April 1, 2018 |
| Submission Date | March 21, 2017 |
| Published in Issue | Year 2018 Volume: 5 Issue: 1 |
Selcuk Dental Journal is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY NC).