DEĞİŞİK YÖNTEMLERLE HAZIRLANAN METAL ALT YAPILAR ÜZERİNDEKİ VENEER PORSELENLERİNİN KIRILMA DİRENCİNE FARKLI KENAR BİTİM ŞEKİLLERİNİN ETKİSİNİN İNCELENMESİ≠

Yıl 2016, Cilt: 26 Sayı: 3, 465 - 472, 01.12.2016

Murat Alkurt Zeynep Yeşil Duymuş

https://doi.org/10.17567/ataunidfd.290299

Öz

Amaç: Bu çalışmada,  değişik yöntemlerle hazırlanan metal alt
yapılar üzerindeki veneer porselenlerinin kırılma direncine farklı kenar bitim
şekillerinin etkisi in vitro olarak
incelenmiştir.

Materyal
ve Metod:
Örneklerin elde edileceği kesilmiş üst 1. küçük azı dişini temsil eden
güdükler;  1. Güdük;  6 mm kuron boyu ve 6^° taper
açısında 1 mm shoulder basamak, 2. Güdük; 6 mm kuron boyu ve 6^°
taper açısında 1 mm chamfer basamak ile standardizasyonun sağlanması amacıyla
CNC torna tezgahında hazırlanmıştır. Güdüklerden alınan ölçülerden 30 adet epoksi rezin güdük elde edilmiştir.
Metal alt yapılar farklı yöntemlerle hazırlandıktan sonra üst yapı porseleni
uygulanarak kuronlar tamamlanmıştır. Kuronlar epoksi rezin güdükler üzerine
simante edildikten sonra veneer porselenlerinin kırılma dirençleri Universal
test cihazında ölçülmüştür. Veriler iki yönlü varyans analizi (ANOVA) ile
değerlendirilmiş, çoklu karşılaştırma ve t-testi uygulanmıştır.

Bulgular: Varyans analizi sonucunda; kırılma direnci değerlerine basamak
şekli ve hazırlama yöntemlerinin etkisinin anlamlı olduğu istatistiksel olarak
tespit edilmiştir (p<0.05).

Sonuç:
En
yüksek veneer porselen kırılma direnci değerlerinin döküm yöntemiyle hazırlanan
chamfer bitim hatlı kuronlarda olduğu görülmüştür.

Anahtar Kelimeler: Metal alt yapılar, kenar bitim şekli, kırılma direnci

 AN ANALYSIS OVER THE EFFECT OF MARGINAL DESIGN ON
THE FRACTURE RESISTANCE OF VENEER PORCELAINS APPLIED ON  METAL FRAMEWORKS PREPARED THROUGH VARIOUS
METHODS

ABSTRACT

 

AimIn this study, the effect of marginal design on the fracture resistance
of  veneer porcelains.

Material and Method: To provide standardization, the dies representing the upper first
premolar tooth, through which samples would be obtained, were prepared in the
CNC turning machine as: the first die; with a 6 mm crown length and at 6^º
taper angle, having a 1 mm sholder marginal desing, the second die; with a 6 mm
crown length and at 6 ^º taper angle, having a 1 mm chamfer marginal
desing. 30 pieces of epoxy resin dies were obtained from the measurements taken
from the dies. After the metal frameworks had been prepared through different
methods, the crowns were completed by applying the body porcelain. After
cementation the crowns on the epoxy resin dies, the fracture resistance of
veneer porcelains was measured by the Universal test device. The data were evaluated through the two-way variance analysis (ANOVA).

Results: It was
statistically determined that the different metal framework methods and
marginal design was significant effected fracture resistance of veneer
porcelains (p<0.05).

Conclusion: The framework of the highest fracture resistance values of veneer
porcelain was seen in cast crowns prepared chamfer marginal design.

Key
Words: Metal frameworks, marginal design, fracture
resistance

Anahtar Kelimeler

Metal alt yapılar, kenar bitim şekli

Kaynakça

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