Turkiye Klinikleri Journal of Dental Sciences

.: ORIGINAL RESEARCH
Aşırı Kuron Hasarı Olan Maksiller Ön Dişlerde Polietilen Fiber ve Cam Fiber Destekli Restorasyonların Kırık Dayanımlarının ve Onarılabilirliğinin Değerlendirilmesi: İn Vitro Çalışma
Evaluation of Fracture Strength and Repairability of Polyethylene Fiber and Glass Fiber Restorations in Maxillary Anterior Teeth with Excessive Crown Damage: In Vitro Study
Yağmur KILIÇa, Şule SOYSALa, Emrah KARATAŞLIOĞLUa
aİzmir Kâtip Çelebi Üniversitesi Diş Hekimliği Fakültesi, Endodonti ABD, İzmir, TÜRKİYE
Turkiye Klinikleri J Dental Sci. 2021;27(4):608-13
doi: 10.5336/dentalsci.2020-80079
Article Language: TR
Full Text
ÖZET
 Amaç: Çalışmamızın amacı, koronal madde kayıplı maksiller santral dişlerde cam fiber post ve polietilen şerit fiber kullanılarak yapılan restorasyonların kırık dayanımları ve yeniden restore edilebilirliği değerlendirmektir. Gereç ve Yöntemler: Çalışmaya dâhil edilen 48 adet maksiller santral dişin koronal segmentleri, palatinalde mine-sement seviyesinde, bukkalde ise mine-sement seviyesinin 2 mm koronalinde olacak şekilde uzaklaştırıldı. Bu şekilde koronal madde kaybı oluşturulan dişlerin kanal boyunda Protaper Universal döner alet eğeleri ile F5 boyda genişletilip, kanal dolumları yapıldı. Her birinde 24 örnek bulunan 2 deney grubu oluşturuldu. Kanal dolgularının cam fiber grubunda 9 mm'si, polietilen fiber grubunda ise 2 mm'si çıkarılarak fiberler yerleştirildi ve simantasyon yapıldı. Kor yüksekliği 4 mm olacak şekilde restorasyon tamamlanıp, örnekler akril bloklar içine gömüldü. Örneklere universal test cihazında (AG-5 kNG, Shimadzu, Tokyo, Japonya) 0,5 mm/dk hızla ve palatinal yüzeyden kökün uzun aksıyla 45º açı oluşturacak şekilde, örnek kırılana kadar kuvvet uygulandı. Veriler t-testi kullanılarak analiz edildi (p=0,05). Bulgular: Cam fiber grubunda ortalama kırık direnci 430±112 N, polietilen fiber grubunda ise 364±154 N olarak bulunmuştur. Cam fiber grubunda 7, polietilen fiber grubunda 13 dişte katastrofik kırık; buna karşılık cam fiber grubunda 17, polietilen fiber grubunda 11 dişte nonkatastrafik kırık izlenmiştir. Sonuç: Bu çalışma sonuçlarına göre anterior bölgede restorasyon için kullanılan post-kor sisteminin türü dişlerin kırılma direncini değiştirmektedir, fakat bu değişim istatistiksel olarak anlamlı değildir (p>0,05). Cam fiber kullanılan dişlerde oluşan kırıkların restore edilebilirlik özelliği daha yüksektir.

Anahtar Kelimeler: Polietilen fiber; cam fiber; kırık dayanımı; restore edilebilirlik
ABSTRACT
 Objective: The purpose of our study, to evaluate the fracture strength and repairability of restorations with glass fiber post and polyethylene fiber in maxillary central teeth with coronal tooth structure loss. Material and Methods: The 48 maxillary central teeth's coronal segments that included in the study were removed at different levels according to the cement enamel junction. After the canal length was determined, the root canals prepared with Protaper Universal F5 and filled with suitable gutta. In the glass fiber group (n=24) and the polyethylene-fiber group (n=24), 9 mm and 2 mm gutta percha were removed, respectively and fibers were placed. The restoration was completed and the samples were placed in acrylic blocks. A force was applied to the specimens at a speed of 0.5 mm/min in a universal test device (AG-5 kNG, Shimadzu, Tokyo, Japan) and at an angle of 45ºdegrees from the palatinal surface to the long axis of the root. Data were analyzed using the t-test (p=0.05). Results: The average fracture resistance in the glass fiber group was 430±112 N, and 364±154 N in the polyethylene-fiber group. Catastrophic fractures occurred in 7 and 13 teeth in the glass fiber group and the polyethylene fiber group, respectively. On the other hand, non-catastropic fractures were observed in 17 teeth in the glass fiber group and 11 teeth in the polyethylene fiber group. Conclusion: According to the results of this study, the type of post-core system used for restoration in the anterior region changes the fracture resistance of teeth, this difference is not statistically significant (p>0.05). The repairability of the fractures in the teeth with glass fiber is higher than other group.

Keywords: Polyethylene-fiber; glass fiber; fracture resistance; repairability
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