İnternal matriks ile birlikte kullanılan MTA’nın ortograd ve retrograd uygulanmasının farklı apikal açıklığa sahip dişler üzerindeki güçlendirme etkisinin değerlendirilmesi

Year 2016, Volume: 33 Issue: 1, 6 - 11, 01.01.2016

Emre Bayram Hüda Melike Bayram , Hakan Eren

https://doi.org/10.17214/aot.36762

Abstract

AMAÇ: Bu çalışmada apikal foramen çapının ve farklı uygulama yöntemlerinin Mineral Trioksit Agregat’ın (MTA) simüle edilmiş immatür dişler üzerine olan kırılma dayanımına etkisinin Universal Test Cihazı kullanılarak belirlenmesi amaçlandı.

GEREÇ VE YÖNTEM: Çalışmada 90 adet çekilmiş üst çene kesici insan dişi kullanıldı. Çalışmada, açık apekse sahip immatür dişleri simüle etmek amacıyla apikal foramen, çapı 1.0 veya 1.4 mm olacak şekilde hazırlandı. Üretici firmanın talimatları doğrultusunda karıştırılan MTA dört farklı yolla (retrograd, ortograd, 2 aşamalı ortograd ve internal matriks destekli ortograd yolla) farklı apikal foramen çapa sahip dişlerin kök kanallarının içine yerleştirildi. Negatif kontrol grubu olarak seçilmiş 5 adet diş hiçbir işlem yapılmadan deney süresine kadar salin solüsyonu içerisinde bekletildi. Pozitif kontrol grubu olarak preparasyonu yapılmış rastgele 5 adet diş seçildi; ancak kanal dolguları yapılmadı. Hazırlanan kökler silindir kalıplar kullanılarak mine-sement sınırının 2 mm apikalinden şeffaf akrilik rezin içerisine gömüldü. Örneklere, dişe dik gelecek şekilde, 5 mm/dk hızda dikey kuvvet uygulandı. Her bir örneğe uygulanan dikey kuvvetler karşısında dişlerin maksimum kırılma dirençleri Newton cinsinden belirlendi. Verilerin istatistiksel analizi bir software kullanılarak yapıldı. Elde edilen veriler tek yönlü ANOVA ve post-hoc Tukey testleri kullanılarak analiz edildi.

BULGULAR: Deney gruplarının birbiri arasında istatistiksel olarak fark bulunmazken (p>0.05), pozitif ve negatif kontrol grupları ile aralarında istatistiksel fark bulundu (p<0.05).

SONUÇ: Farklı yollarla yerleştirilen MTA’nın dikey kuvvetler karşısında dişlerin kırılma dayanımları üzerine anlamlı bir etkisi olmadığı saptandı.

Keywords

Diş apeksi, diş kırıkları, mineral trioksid agregat

Evaluation of the reinforcement effect on teeth with different apical foramen diameters of retrograde or orthograde MTA application with internal matrix

Abstract

OBJECTIVE: The aim of this study was to determine the effect of the apical foramen diameter and different application methods of Mineral Trioxide Aggregate (MTA) on the fracture resistance of simulated immature teeth using a Universal Testing Machine.

MATERIALS AND METHOD: Ninety extracted human teeth were used for the fracture resistance test. The apical foramen was prepared to a diameter of 1.0 mm or 1.4 mm to simulate the open apex of immature teeth. MTA was mixed according to manufacturer's recommendations and placed into the root canals with different apical foramen diameter by four different root filling techniques: retrograde, two-phased orthograde, and ortograde with or without internal matrix. Prepared roots were marked 2 mm below the cemento-enamel junction and embedded in transparent acrylic resin in cylinder moulds. Vertical force was applied along the long axis of the tooth at a speed of 5 mm/min, and the maximum resistance to fracture for each tooth was determined in Newton. A software package was used for the statistical analysis. The data were analyzed by using one-way ANOVA and post-hoc Tukey tests.

RESULTS: A statistically significant difference could not be observed between the groups (p>0.05) whereas statistically significant differences were found between the test groups and the control groups (p<0.05).

CONCLUSION: There was no significant difference between different vertical root filling techniques in increasing the fracture strength of the teeth. The diameter of the apical foramen did not have a significant effect on the fracture resistance.

Keywords

Mineral trioxide aggregate, tooth apex, tooth fractures

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