Yıl 2014, Cilt 31, Sayı 1, Sayfalar 1 - 6 2014-02-25

Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials
Isısal ve mekanik yaşlandırma işlemlerinin Y-TZP kor materyallerinin kırılma tokluğuna etkisi

Merve Bankoğlu Güngör [1] , Handan Yılmaz [2] , Bilge Turhan Bal [3] , Seçil Karakoca Nemli [4] , Pırıl Türkan Sindel [5] , Cemal Aydın [6]

327 436

OBJECTIVE: The purpose of this study was to evaluate the effect of thermal and mechanical aging on the fracture toughness of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) core materials.

MATERIALS AND METHOD: Disc-shaped specimens for each core material (diameter: 15 mm, thickness: 1.2 mm), Cercon Base and Lava Plus, were randomly divided into three groups (control, thermal aging and mechanical aging). No aging was applied to control specimens. Thermal aging group specimens were subjected to 104 thermal cycles in water between 5-55 °C (dwell time of 30 s). Mechanical aging group specimens were subjected to a 200 N load for 105 times, with a frequency of 2 Hz. The fracture toughness of the control, thermal and the mechanical aging groups were measured by using the indentation fracture technique. Ten indentations were performed for each material. After each indentation, microscopic readings were recorded and the fracture toughness was calculated according to an established formula. Results were statistically analyzed by using a two-way analysis of variance (ANOVA) test.

RESULTS: Indentation fracture toughness values of the control, the thermal and the mechanical aging groups of Cercon Base were 6.28, 6.39 and 6.02 MPa√m, respectively. There was no significant difference between the control group of Cercon Base and the aging groups (p>0.05). However, significant difference was found between the thermal and the mechanical aging groups of Cercon Base (p<0.05). Indentation fracture toughness values of the control, the thermal and the mechanical aging groups of Lava Plus were 4.79, 4.76 and 4.91 MPa√m, respectively. Again, there was no significant difference between the control the aging groups of Lava Plus (p>0.05).

CONCLUSION: Compared to control, thermal and mechanical aging had no significant effect on the fracture toughness of the different Y-TZP core materials.

AMAÇ: Bu çalışmanın amacı, ısısal ve mekanik yaşlandırma işlemlerinin, yttria-stabilize dörtgen zirkon (Y-TZP) kor materyallerinin kırılma tokluğu üzerindeki etkisinin araştırılmasıdır.

GEREÇ VE YÖNTEM: Her iki kor materyalinden disk şeklinde üretilen Cercon Base and Lava Plus örnekler (15 mm çap 1.2 mm kalınlık) rastgele olarak 3 gruba (kontrol, ısısal yaşlandırma ve mekanik yaşlandırma) ayrıldı. Kontrol gruplarına herhangi bir işlem yapılmadı. Isısal yaşlandırma işlemi 5-55 °C sıcaklıklarda su içeren banyolarda, her birinde 30 sn kalacak şekilde 104 kez uygulandı. Mekanik yaşlandırma işlemi ise, 200 N yük ile, 2 Hz frekansta 105 kez uygulandı. Kırılma tokluğu deneyi indentasyon kırılma metodu kullanılarak gerçekleştirildi. Her grup için on ölçüm yapıldı. Her bir indentasyon sonrası mikroskopik okuma kaydedildi ve kırılma tokluğu değeri önceden belirlenmiş bir formüle göre hesaplandı. İstatistiksel analiz iki yönlü varyans analizi (ANOVA) ile yapıldı.

BULGULAR: Cercon Base grubu örneklerin kırılma tokluğu değerleri, kontrol, ısısal ve mekanik yaşlandırma grubu için sırasıyla 6.28, 6.39 ve 6.02 MPa√m olarak belirlendi. Cercon Base grubu örneklerinde, kontrol grubu ve yaşlandırma grupları arasında istatistiksel olarak anlamlı bir fark bulunmadı (p>0.05). Fakat, Cercon Base grubunda, ısısal ve mekanik yaşlandırma grupları arasında istatistiksel olarak anlamlı fark bulundu (p<0.05). Lava Plus grubu örneklerinin kırılma tokluğu değerleri, kontrol, ısısal ve mekanik yaşlandırma grubu için sırasıyla 4.79, 4.76 ve 4.91 MPa√m olarak belirlendi. Lava Plus grubu örneklerinde, kontrol grubu ve yaşlandırma grupları arasında istatistiksel olarak anlamlı bir fark bulunmadı (p>0.05).

SONUÇ: Yaşlandırma işlemlerinin, kontrole kıyasla, Y-TZP kor materyallerine ait kırılma tokluğu değerlerini belirgin olarak etkilemediği tespit edildi.

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Birincil Dil en
Konular Sağlık Bilimleri ve Hizmetleri
Dergi Bölümü Özgün Araştırma Makalesi
Yazarlar

Yazar: Merve Bankoğlu Güngör

Yazar: Handan Yılmaz

Yazar: Bilge Turhan Bal

Yazar: Seçil Karakoca Nemli

Yazar: Pırıl Türkan Sindel

Yazar: Cemal Aydın

Bibtex @araştırma makalesi { gaziaot86612, journal = {Acta Odontologica Turcica}, issn = {}, eissn = {2147-690X}, address = {Gazi Üniversitesi}, year = {2014}, volume = {31}, pages = {1 - 6}, doi = {10.17214/aot.41767}, title = {Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials}, key = {cite}, author = {Karakoca Nemli, Seçil and Sindel, Pırıl Türkan and Bankoğlu Güngör, Merve and Yılmaz, Handan and Aydın, Cemal and Turhan Bal, Bilge} }
APA Bankoğlu Güngör, M , Yılmaz, H , Turhan Bal, B , Karakoca Nemli, S , Sindel, P , Aydın, C . (2014). Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials. Acta Odontologica Turcica, 31 (1), 1-6. DOI: 10.17214/aot.41767
MLA Bankoğlu Güngör, M , Yılmaz, H , Turhan Bal, B , Karakoca Nemli, S , Sindel, P , Aydın, C . "Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials". Acta Odontologica Turcica 31 (2014): 1-6 <http://dergipark.gov.tr/gaziaot/issue/6532/86612>
Chicago Bankoğlu Güngör, M , Yılmaz, H , Turhan Bal, B , Karakoca Nemli, S , Sindel, P , Aydın, C . "Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials". Acta Odontologica Turcica 31 (2014): 1-6
RIS TY - JOUR T1 - Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials AU - Merve Bankoğlu Güngör , Handan Yılmaz , Bilge Turhan Bal , Seçil Karakoca Nemli , Pırıl Türkan Sindel , Cemal Aydın Y1 - 2014 PY - 2014 N1 - doi: 10.17214/aot.41767 DO - 10.17214/aot.41767 T2 - Acta Odontologica Turcica JF - Journal JO - JOR SP - 1 EP - 6 VL - 31 IS - 1 SN - -2147-690X M3 - doi: 10.17214/aot.41767 UR - http://dx.doi.org/10.17214/aot.41767 Y2 - 2013 ER -
EndNote %0 Acta Odontologica Turcica Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials %A Merve Bankoğlu Güngör , Handan Yılmaz , Bilge Turhan Bal , Seçil Karakoca Nemli , Pırıl Türkan Sindel , Cemal Aydın %T Effect of thermal and mechanical aging on fracture toughness of Y-TZP core materials %D 2014 %J Acta Odontologica Turcica %P -2147-690X %V 31 %N 1 %R doi: 10.17214/aot.41767 %U 10.17214/aot.41767
ISNAD Bankoğlu Güngör, Merve , Yılmaz, Handan , Turhan Bal, Bilge , Karakoca Nemli, Seçil , Sindel, Pırıl Türkan , Aydın, Cemal . "Isısal ve mekanik yaşlandırma işlemlerinin Y-TZP kor materyallerinin kırılma tokluğuna etkisi". Acta Odontologica Turcica 31 / 1 (Şubat 2014): 1-6. http://dx.doi.org/10.17214/aot.41767