HİBRİT SİLİKA İLAVESİNİN AKRİLİK KAİDE MATERYALİNİN MEKANİK ÖZELLİKLERİNE ETKİSİ

Yıl 2018, Cilt: 28 Sayı: 1, 33 - 38, 28.03.2018

Pınar Çevik

https://doi.org/10.17567/ataunidfd.410364

Cited By: 1

Öz

Amaç: Bu in
vitro pilot çalışmanın amacı akrilik rezin kaide materyalinin
nanopartiküllü hibrit silika ilavesi sonrası bükülme dayanımı ve reziliens
özelliklerinin incelenmesidir.

Gereç ve Yöntem: Yirmi adet bar
şeklinde (65x 10x3 mm³) hazırlanan akrilik örnek iki ana test
grubuna ay- rılmıştır. Grup 1 kontrol grubudur. Grup 2 silika grubu olup
akrilik karışım içerisine ağırlıkça % 5 oranında si- lanlanmış hibrit silika
ilave edilmiştir. Akrilik örnekler ısı ile polimerize olan akrilik kaide
materyalinden toz/likit oranı 25 gr/10 ml olacak şekilde üretici talimatları
doğ- rultusunda hazırlanmıştır. Silika partikülleri akrilik mo- nomere manuel olarak
ilave edilmiştir. Polimerizasyon sürecini takiben akrilik örnekler, 1 mm/
dakika hızında kuvvet uygulayan üniversal test cihazı yardımıyla üç nokta
bükülme dayanımı testine tabi tutulmuştur. Bü- külme dayanımı ve reziliens
verilerine ait değerler ci- haza bağlı bir bilgisayar tarafından Megapaskal
(MPa) ve Joul (J) olarak kaydedilmiştir. İstatistiksel analizin bağımsız
gruplar T-testi ile değerlendirildiği
çalışmada, anlamlılık düzeyi p<0.05 olarak belirlenmiştir.

Bulgular: Bükülme dayanımı değerleri gruplar
için sı- rasıyla; Grup 1 (223.44 MPa±26.9) ve Grup 2 (109.01 MPa±20.07)’dir.
Bükülme dayanımı bakımından grup- lar arasındaki fark istatistiksel olarak
anlamlı bulu- nurken, reziliens değerleri açısından kontrol grubu (0.024
J±0.01) ile silika grubu (0.015 J±0.01) arasın- da istatistiksel olarak anlamlı
bir fark bulunamamıştır.

Sonuç: Akrilik rezin içerisine ağırlıkça % 5
oranında hibrit silika ilavesi akriliğin bükülme dayanımı ve reziliens
değerlerini düşürmüştür. Gelecek çalışma- larda, farklı yüzdeliklerdeki hibrit nanosilika
ilavesinin akrilik rezin materyalinin sertlik ve yüzey özellikleri gibi farklı mekanik
özelliklerine etkisi araştırılabilir.

Anahtar Kelimeler: Akrilik rezinleri, nanopartüküller, silikon dioksit

EFFECT OF HYBRID SILICA INCORPORATION ON THE MECHANICAL PROPERTIES OF
DENTURE BASE ACRYLIC RESIN

Aim: The purpose of this in vitro
pilot study is to assess the flexural strength and the resilience of denture
base acrylic resin after hybrid nanoparticulated silica incorporation.

Material and
Methods: Twenty bar shaped (65x 10x3 mm³) acrylic
blocks were fabricated and divided into two test groups as follows: Group 1 was
acted as control, while Group 2 acted as silica group in which the silane
treated hybrid silica nanoparticles were incorporated into the acrylic mixture
5% by weight. A heat cure acrylic resin was used with a powder: liquid ratio as
25 gr/10 ml. Silica nanoparticles were added to the acrylic monomer manually
while mixing. After polymerrization process, three-point bending flexural
strength test was conducted to the acrylic specimens with a universal testing
device at a crosshead speed of 1 mm/minute. The flexural strength and the
resilience values were derived from the computer system connected to universal
test device. The data were recorded as Megapascals (MPa) and Joul (J). An
unpaired T-test was used for the
statistical analysis (p<0.05).

Results: The flexural strength values of the groups are as follows: Group 1 (223.44 MPa±26.9) and
Group 2 (109.01 MPa±20.07), respectively. While the difference between groups was statistically significant for
the flexural strength test, the difference between control (0.024 J±0.01) and silica group (0.015
J±0.01) was significant for the resilience results.

Conclusion: The addition of hybrid nano-silica at 5 % by weight was reduced the
flexural strength and the resilience of the denture base acrylic resin. Further
studies could investigate the hardness and surface characteristics of the
denture base acrylic resin after adding silica nanoparticles with different
percentages.

Keywords: Acrylic resins, nanoparticles, silicon dioxide

Anahtar Kelimeler

Akrilik rezinleri, nanopartüküller

Kaynakça

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