Comparative evaluation of Mineral Trioxide Aggregate MTA usage as a Barrier Material in Intracoronal Bleaching Procedures

Year 2005, Volume: 32 Issue: 2 - Volume: 32 Issue: 2, 107 - 114, 01.05.2005

Şule Bayrak Emine Şen Tunç Serap Çetiner

Abstract

The aim of this study was to compare the effectiveness of mineral trioxide aggregate MTA , glass ionomer cement and zinc phosphate cement usage as a barrier material in intracoronal bleaching procedures. In this study, 38 freshly extracted, caries free human permanent single root teeth were used. The root canals cleaned and shaped with Step-back technique. The canals were then obturated with gutta percha and AH plus sealer. After, the teeth were randomly divided into three experimental groups, and a positive and three negative control groups. The teeth in the experimental groups received 2 mm of barrier material, either MTA, glass ionomer and zinc phosphate cement. The teeth in the positive control group received no barrier material, the teeth in the negative control groups did not undergo bleaching. Each teeth was then bleached using sodium perborate and water. The bleaching agents were replaced every 7 days, over three weeks. Following the bleaching procedures, the teeth were stored in the % 0.5 basic fucsin for 24 hours evaluate for leakage. All teeth specimens divided mesio-distally into two pieces, and evaluated under stereomicroscope for the measurement of dye penetration. Although results showed, there were no statistically significant differences found between the MTA and zinc phosphate cement groups p>0.05 , MTA had showed better results. Glass ionomer cement showed statistically more leakage than MTA and zinc phosphate cement p

Keywords

Bleaching, barrier materials, mineral trioxide aggregate

MİNERAL TRİOXİDE AGGREGATE MTA 'İN İNTRAKORONAL AĞARTMA UYGULAMALARINDA BARİYER MATERYALİ OLARAK KULLANIMININ KARŞILAŞTIRILMALI DEĞERLENDİRİLMESİ

Abstract

Bu çalışmanın amacı; mineral trioxide aggregate’in MTA intrakoronal ağartma uygulamalarında izolasyon bariyer materyali olarak kullanımının, cam iyonomer siman ve çinko fosfatsiman ile karşılaştırılmalı olarak değerlendirilmesidir. Çalışmada, yeni çekilmiş otuz sekiz adetçürüksüz daimi tek köklü insan dişi kullanıldı. Kökkanalları temizlenip, Step-Back tekniği ilegenişletildi, daha sonra AH plus ve guta-perka iledolduruldu. Bu işlemlerden sonra, dişler rasgele üçdeney grubu, bir pozitif kontrol ve üç negatifkontrol gruplarına ayrıldı. Kök kanal dolgularıüzerine bariyer materyali olarak ortalama 2mmkalınlığında cam iyonomer siman, çinko fosfatsiman ve MTA’dan oluşan deney materyalleriyerleştirildi. Negatif kontrol gruplarındaki dişlereağartma işlemi uygulanmamış, pozitif kontrolgrubu örneklerine ise bariyer materyali yerleştirilmemiştir. Bu işlemlerin ardından, deneygruplarındaki tüm dişlere sodyum perborat ve sukarışımından oluşan ağartma ajanı üç haftaboyunca, birer hafta arayla uygulandı. Ağartmauygulamalarından sonra, dişler % 0,5’lik bazik fuksin boyasında 24 saat bekletildi. Tüm örnekler mesio-distal yönde ikiye ayrılıp, boya penetrasyonu stereomikroskop altında değerlendirildi . Her ne kadar istatistiksel olarak MTA ve çinko fosfat siman grupları arasında anlamlı szııntı farkı olmasa da p>0.05 , bulgularımız MTA’nın daha az sıznıtı gösterdiği yönündedir. Cam iyonomer simanın MTA ve çinko fosfat simana göre istatistiksel olarak daha fazla sızıntı sergilediği görülmüştür p

Keywords

Ağartma, bariyer materyalleri, mineral triokside aggregate

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