Abstract
Amac: Bu calismanin amaci, antimikrobiyal ajan olarak farkli agirlik yuzdeleriyle ilave edilen gumus-zeolitin isiyla polymerize olan polimetilmetakrilat protez kaidesinin egilme dayanimina etkisinin isil islem oncesi ve sonrasi degerlendirilmesidir. Gerec ve Yontem: 64x10x3,3mm ebatlarinda standart test ornekleri gumus-zeolitin (Zeomic @ ) % 0, % 0,5, % 2 ve % 4 kuru agirlik yuzdelerinde isi ile polimerize olan akrilik tozuna ilave edilmesiyle hazirlanmistir. Her grup icin toplam 20 ornek hazirlanmistir. Kontrol grubu olarak gumus-zeolit ilave edilmeyen ornekler kullanilmistir (n=20). Bu gruplar daha sonra isil islem uygulanmayan ve uygulanan olmak uzere 2 alt gruba (n=10) daha ayrilmistir. Isil dongu uygulanan gruptaki ornekler 10000 donguluk isil dongu islemine (5 °C ve 55 °C’de, 30 sn aralikla) tabii tutulmuslardir. Egilme dayanimlarinin hesaplanmasinda universal test cihazinda 3 nokta egme testi yapilmistir. Verilerin istatistiksel analizi icin Minitab Release 15 yazilim programi ile ANOVA ve bagimli orneklem t-testi kullanilmistir. Anlamlilik p 0.05). Ayrica isil dongu islemi butun gruplarda egilme dayanimini istatistiksel olarak anlamli sekilde azaltmistir (p<0.05). Sonuc: Calismamizda gumus-zeolitin agirlik yuzdesinin artmasi ve isil dongu islemi uygulanmasi ile egilme dayaniminin azalmasina ragmen bulunan degerler ISO 20795-1:2013(E) no’lu standartta belirtilen 65 MPa’ dan daha yuksek bulunmustur. Anahtar Kelimeler: Akrilik, Egilme dayanimi, Gumus-zeolit, Isil dongu islemi IN-VITRO EVALUATION OF FLEXURAL STRENGTHS OF ACRYLIC RESINS INCORPORATED SILVER ZEOLITE ABSTRACT Aim: The aim of this study was to evaluate the effect of silver-zeolite on flexural strength, which was added into heat polymerized polymethylmethacrylate (PMMA) denture base resin with different percentages as antimicrobial agent before and after thermal cycling. Material and method: Standard test specimens in sizes of 64x10x3.3 mm were prepared by adding silver-zeolite (Zeomic @ ) into heat polymerized acrylic powder with 0 %, 0.5 %, 2 %, and 4 % dry weight percentages. A total of 20 samples were prepared for each group. A total of 20 samples without silver-zeolite served as the control group. These groups were then divided into 2 subgroups (n = 10), a not-thermal cycled and thermal cycled group. Samples in thermal cycled group were subjected to 10000 thermal cycling (5 °C-55 °C). Three-point FS of the specimens was tested in a universal testing machine and the flexural strength data (σ) was calculated (MPa). Statistical analysis of the data was performed using the Minitab Release 15 software program by ANOVA and paired t-test. Significance was set at p<0.05. Results: For both groups (non-thermal cycled and thermal cycled), the flexural strength of the control group (0% weight percentage) was significantly higher than the other three groups (0.5 %, 2 %, 4 %) (p<0.05). The differences between other 3 groups were also statistically significant (p<0.05). In addition, for all groups the flexural strength decreased statistically significantly with thermal cycling (p<0.05). Conclusion: Although an increase in the percentage of silver-zeolite and the application of thermal cycling reduced the flexural strength, our results are still higher than the 65 MPa which is specified in the standard ISO 20795-1: 2013 (E). Keywords: Acrylic, Flexural strength, Silver-zeolite, Thermal cycling
Published Version
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