Turkiye Klinikleri Journal of Dental Sciences

.: ORIGINAL RESEARCH
Endodontik Giriş Kavitesi Şeklinin ve Akışkan Kompozit Uygulamasının Dişlerin Kırılma Dayanımı Üzerine Etkisi
The Effect of Endodontic Access Cavity Shape and Appication of Flowable Composite on Fracture Strength of Teeth
Şebnem EROL ARIKANa, A. Cemal TINAZb, Z. Gonca BEK KÜRKLÜc
aEtimesgut Ağız ve Diş Sağlığı Merkezi, Ankara, TÜRKİYE
bGazi Üniversitesi Diş Hekimliği Fakültesi, Endodonti ABD, Ankara, TÜRKİYE
cÇukurova Üniversitesi Diş Hekimliği Fakültesi, Restoratif Diş Tedavisi ABD, Adana, TÜRKİYE
Turkiye Klinikleri J Dental Sci.2021;27(2):286-93
doi: 10.5336/dentalsci.2020-75369
Article Language: TR
Full Text
ÖZET
 Amaç: Çalışmanın amacı, azı dişlerinde oblik sırt korunarak açılan endodontik giriş kavitesinin ve akışkan kompozit kullanımının kırılma dayanımına etkisinin araştırılmasıdır. Gereç ve Yöntemler: Yüz on üst 1. büyük azı dişi 5 gruba ayrıldı. Grup 1 oblik sırtın korunduğu ve kaide olarak akışkan kompozitin (Filtek Supreme XT Flow; 3M ESPE, St. Paul, MN, ABD) uygulandığı dişler. Grup 2 oblik sırtın korunduğu ve akışkan kompozitin uygulanmadığı dişler. Grup 3 oblik sırtın kaldırıldığı ve akışkan kompozitin uygulandığı dişler. Grup 4 oblik sırtın kaldırıldığı ve akışkan kompozitin uygulanmadığı dişler. Grup 5 prepare edilmemiş dişler. Tüm dişlerin restorasyonları üniversal bir kompozit rezin ile tamamlandı. Maksimum kırılma dayanımları tek yönlü ANOVA ve Bonferroni testleri kullanılarak analiz edildi. Sonlu elemanlar stres analizi (SESA) için bilgisayar ortamında modeller oluşturuldu. Bulgular: En yüksek kırılma dayanımı hiçbir işlem uygulanmayan sağlam diş grubundadır (Grup 5). Grup 5, 1 ve 3 arasında istatistiksel fark bulunamamıştır (p>0,05). Akışkan kompozitin kullanılmadığı grupların kırılma dayanımı (grup 2 ve grup 4) akışkan kompozitin kullanıldığı gruplara (grup 1 ve grup 3) göre istatistiksel olarak anlamlı düşük bulunmuştur (p<0,001). SESA'da, grup 4 hariç grupların benzer stres dağılımı gösterdiği gözlendi. Grup 4'te stresin furkasyon bölgesine doğru yayılım gösterdiği gözlendi. Sonuç: Akışkan kompozit kullanımı ve oblik sırtın korunması dişlerin dayanımını artırmaktadır.

Anahtar Kelimeler: Kavite kaplayıcıları; kavite preparasyonları; kırılma dayanımı
ABSTRACT
 Objective: The aim of this study was to eveluate the effect of endodontic access cavity preparations by preventing oblique ridge and application of flowable composite on fracture strength in molar teeth. Material and Methods: 110 maxillary first molars were divided into five groups. Teeth in which Group 1 oblique ridge is protected and flowable composite (Filtek Supreme XT Flow; 3M ESPE, St. Paul, MN, USA) is applied as liner. Teeth in which Group 2 oblique ridge is protected and flowable composite is not applied. Teeth in which group 3 oblique ridge is protected and flowable composite is applied. Teeth in which Group 4 oblique ridge is protected and flowable composite is not applied. Group 5 were unprepared teeth. The restoration was then completed with a universal composite resin. The samples were tested using a universal testing machine. Peak loads analyzed using one-way ANOVA and Bonferroni tests. Finite element analyses (FEA) models were created in a computer. Results: The highest fracture strength is in the intact tooth group (Group 5). There was no statistical difference between groups 5, 1 and 3 (p>0.05). The fracture strength of the groups which no flowable composite was used (group 2 and group 4) was found significantly lower than the groups which the flowable composite (group 1 and group 3) was used (p<0.001). In FEA, it was observed that the groups showed similar stress distribution except in Group 4. In group 4 the stress spread towards the furcation region. Conclusion: The application of flowable composites and protection of the oblique ridge increases the fracture strength.

Keywords: Cavity liners; cavity preparations; fracture strength
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