FARKLI KENAR BİTİM VE ALT YAPI DİZAYNLARININ ÇEŞİTLİ ZİRKONYUM ALT YAPILAR ÜZERİNDEKİ VENER PORSELENİN KIRILMA DİRENCİNE ETKİSİNİN İNCELENMESİ

Year 2019, Volume: 29 Issue: 2, 268 - 276, 22.03.2019

Murat Alkurt Zeynep Yeşil Duymuş

https://doi.org/10.17567/ataunidfd.448486

Cited By: 1

Abstract

Amaç: Bu çalışmada,  kenar bitim ve alt yapı şekillerinin çeşitli zirkonyum
alt yapılar üzerindeki vener porselenlerinin kırılma direncine etkisi in vitro olarak incelenmiştir.

Gereç ve Yöntem: Örneklerin elde edileceği kesilmiş üst
1. küçük azı dişini temsil eden güdükler; 
1. Güdük;  6 mm kuron boyu ve 6⁰
taper açısında 1 mm shoulder basamak ile anatomik oklüzal yüzeyli, 2. Güdük; 6
mm kuron boyu ve 6⁰ taper açısında 1 mm chamfer basamak ile anatomik
oklüzal yüzeyli,  3. Güdük; 6 mm kuron
boyu ve 6⁰ taper açısında, 1 mm shoulder basamak ile düz oklüzal
yüzeyli, 4. Güdük; 6 mm kuron boyu ve 6⁰ taper açısında 1 mm chamfer
basamak ile düz oklüzal yüzeyli olarak standardizasyonun sağlanması amacıyla
CNC torna tezgahında hazırlanmıştır. Güdüklerden alınan ölçülerden 60 adet epoksi rezin güdük elde
edilmiştir. Zirkonyum alt yapılar farklı yöntemlerle hazırlandıktan sonra üst
yapı porseleni uygulanarak kuronlar tamamlanmıştır. Kuronlar epoksi rezin
güdükler üzerine simante edildikten sonra vener porselenlerinin kırılma
dirençleri Universal test cihazında saptanmıştır.

Bulgular: Veriler üç yönlü varyans analizi
(ANOVA) ile değerlendirilmiştir. Kenar bitim şekli, alt yapı şekli ve materyallerin, materyaller ile
alt yapı şekli, materyaller ile kenar bitim şekli arasındaki etkileşimin
anlamlı olduğu, kenar bitim şekli ile alt yapı şekli, materyaller ile alt yapı
şekli ve kenar bitim şekli arasındaki etkileşimlerin ise anlamlı olmadığı
istatistiksel olarak tespit edilmiştir.

Sonuç: En yüksek vener porselen kırılma direnci değerlerinin alt yapısı
anatomik şekilde hazırlanan chamfer basamaklı White Peaks kuronlarda, en düşük
kırılma direnci değerlerinin ise alt yapısı düz şekilde hazırlanan chamfer
basamaklı Lava kuronlarda olduğu görülmüştür.

Anahtar Kelimeler: Alt yapı şekli, kenar bitim şekli,
kırılma direnci, zirkonyum alt yapılar.

Effect of different marginal finish
lines and coping designs on the fracture resistance of veneering porcelain on
various zirconia frameworks              

ABSTRACT

Aim: In this in vitro study, the
effect of finish line and coping design on the fracture resistance of veneer
porcelains on the zirconia frameworks prepared through various methods was
analyzed.

Material and Methods: To standardization, the dies
representing the upper first premolar tooth were prepared in the CNC turning
machine as: the first die; with a 6 mm crown length and at 6⁰ taper
angle, having an anatomic occlusal surface with a 1 mm shoulder line, the
second die; with a 6 mm crown length and at 6⁰ taper angle, having
an anatomic occlusal surface with a 1 mm chamfer line, the third die; with a 6
mm crown length and at 6⁰ taper angle, having a flat occlusal
surface with a 1 mm shoulder line, and the fourth die; with a 6 mm crown length
and at 6⁰ taper angle, having a 1 mm chamfer line with a flat
occlusal surface. 60 pieces of epoxy resin dies were obtained from the
measurements taken from the dies. Zirconia frameworks had been prepared through
different methods, then 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.

Results: The
data were analyzed by three-way variance analysis (ANOVA). It was statistically
determined that the interaction between the finish line, coping design and
materials; and the materials and coping design, and the finish line and the
materials. However; no significant interaction was observed between the finish line
and coping design; and the materials, coping design and the finish line.

Conclusion: The highest fracture resistance values
of veneer porcelain was seen in chamfer line White Peaks crowns prepared
anatomically, whereas the framework of the lowest fracture resistance values
was seen in the chamfer line Lava crowns.

Key
Words: Coping design, finish lines, fracture resistance,
zirconia frameworks

Keywords

Alt yapı şekli, kenar bitim şekli, kırılma direnci

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