FARKLI NANOPARTİKÜLLERLE GÜÇLENDİRİLEN MİKRODALGA ENERJİSİ İLE POLİMERİZE OLAN AKRİLİK REZİNİN MEKANİK VE FİZİKSEL ÖZELLİKLERİNİN DEĞERLENDİRİLMESİ

Yıl 2020, Cilt: 30 Sayı: 1, 101 - 106, 15.01.2020

Muhammet Karcı Necla Demir Şakir Yazman

https://doi.org/10.17567/ataunidfd.492642

Öz

Amaç: PMMA, protetik diş hekimliğinde protez
kaide materyali olarak yaygın kullanılmasına rağmen düşük mekanik ve fiziksel
özellikler gibi dezavantajlara sahiptir.
Bu çalışmanın amacı, mikrodalga
enerjisi ile polimerize olan akrilik rezin içerisine ağırlıkça % 1, 3 ve 5
oranlarında Al₂O₃, SiO₂ ve TiO₂
nanopartikülleri ilavesinin yüzey sertliği ve yüzey pürüzlülüğü gibi mekanik ve
fiziksel özellikleri üzerine etkisini değerlendirmektir.

Gereç ve Yöntem: Çalışmamızda üretici firmanın
önerileri dikkate alınarak, on farklı
grup için toplam yetmiş akrilik rezin örnek
(65×10×3 mm) hazırlanmıştır (n=7). Polisaj ve cilalama işlemleri yapıldıktan
sonra yüzey pürüzlülük değerleri (Ra)
profilometre cihazı ile, yüzey sertliği değerleri ise Rockwell R testi ile
ölçülmüştür. Elde edilen verilerin homojenitesi Kolmogorov-Smirnov testi ile
değerlendirildikten sonra iki yönlü varyans analizi ve Tukey HSD testleri
kullanılmıştır (α=0.05).  

Bulgular: Yüzey pürüzlülüğü değerleri açısından, %1
oranında nanopartikül ilave edilen grubun pürüzlülük değerleri kontrol grubuna
oldukça yakın bulunurken (0.28-0.29), %3 ve %5 oranında ilave yapılan grupların
pürüzlülük değerleri mikroorganizma tutulumu için kritik değerden (0.2 µm) çok
yüksek (0.46-0.84) bulunmuştur. Yüzey sertliği değerleri açısından ise
nanopartikül ilavesi sonucunda yüzey sertlik değerleri artarken en yüksek
değerler %5 oranında ilave edilen gruplarda bulunmuştur (p <
0.05).

Sonuç: Bu
çalışmanın sınırları dahilinde, PMMA’a nanopartikül ilavesi ile mekanik
özellikleri geliştirilebilir,  ancak
nanopartikül ilave yüzdesi arttıkça (%3 ve %5) PMMA’nın yüzey pürüzlülük
değerlerinin artması ideal doldurucu oranının %1 olduğunu göstermektedir.

 

Anahtar kelimeler: Polimetilmetakrilat,
Nanopartikül, Yüzey pürüzlülüğü, Yüzey sertliği.

Evaluation of mechanical and physical properties of micro-waved
acrylic resin reinforced with different nanoparticles

Abstract

Purpose:
PMMA
has disadvantages such as low mechanical and physical properties although it is
widely used as prosthetic base material in prosthetic dentistry. The aim of this study is to evaluate
the effects of adding Al₂O₃, SiO₂ and TiO₂
nanoparticles in ratios of 1, 3 and 5 wt% to micro-waved acrylic resins on the
mechanical and physical properties such as surface hardness and surface
roughness.

Material
and Method: A
total of seventy acrylic resin specimens (65×10×3
mm) were
prepared in different ten groups according to manufacturer’s instructions (n=7).
After polishing surface roughness values ​​were measured by profilometer, and
surface hardness values ​​were measured by Rockwell R test. Homogeneity of the
obtained data was assessed by Kolmogorov-Smirnov test followed by Two-way ANOVA
and Tukey HSD test (α=0.05).

Results:
In
terms of surface roughness values, the roughness of the groups added with 1% nanoparticle
were very close to control group (0.28-0.29), whereas roughness values ​​of 3%
and 5% addition groups were found to be very high (0.46-0.84) from the critical
value (0.2 μm) for microorganism involvement. In terms of surface hardness
values, surface hardness values were increased as a result of nanoparticle
addition, whereas the highest values were foud in 5% addition groups (p < 0.05).

Conclusion:
Within
the limitations of this study, the mechanical properties can be improved with
the addition of nanoparticles to PMMA, but the increase in the surface
roughness values of PMMA with increasing nanoparticle addition ratio (3% and
5%) suggests that the ideal filler ratio is 1%.

Keywords:
Polymethylmethacrylate,
Nanoparticle, Surface roughness, Surface hardness.

Anahtar Kelimeler

Polimetilmetakrilat, Nanopartikül, Yüzey pürüzlülüğü

Kaynakça

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