Evaluation of surface roughness of different restorative materials containing glass ionomer

Yıl 2013, Cilt: 30 Sayı: 1, 13 - 7, 11.03.2013

Mehmet Bani , Nurhan Öztaş

Öz

OBJECTIVE: The aim of this study was to determine the effect of various pH levels on surface roughness of different type glass ionomer-containing restorative materials.

MATERIALS AND METHOD: Five different types of restorative materials containing glass ionomer were selected for the study. The materials used in the study were inserted into rectangular prism metal molds with 3x3x2 mm dimensions and polymerized. The specimens were kept in citric acid solution with varying pH levels (pH 2-6) at 37 ^oC for a week. Then, surface roughnesses were determined by using a profilometer with a tip diameter of 5 µm.

RESULTS: As the pH values decreased, surface roughnesses increased. Greatest alterations were reported for conventional glass ionomer cement and nano ionomer groups. In the giomer group, relatively low surface roughness was observed.

CONCLUSION: Change in the surface roughness as a result of exposure to low pH is associated with the type of the glass ionomer restorative material. Restorative materials that contained greater resin portion were less affected by low pH levels.

Anahtar Kelimeler

Giomer, Glass Ionomer, Nano Ionomer, Surface Roughness

Cam iyonomer içerikli farklı restoratif materyallerin yüzey pürüzlülüklerinin değerlendirilmesi

Öz

AMAÇ: Bu çalışmanın amacı değişik pH seviyelerinin farklı yapıda cam iyonomer içeren restoratif materyallerin yüzey pürüzlülüklerine etkisini belirlemektir.

GEREÇ VE YÖNTEM: Araştırma için beş farklı tipte cam iyonomer içerikli restoratif materyal kullanıldı. Kullanılan materyaller diktörtgenler prizması biçimindeki 3x3x2 mm’lik metal kalıplara yerleştirilerek sertleşmeleri sağlandı. Örnekler gruplara göre değişen pH seviyesindeki (pH 2-6) sitrik asit solüsyonunda 37 ^oC’de 1 hafta bekletilmelerinin ardından yüzey pürüzlülükleri, uç çapı 5 µm olan bir profilometre cihazı kullanılarak ölçüldü.

BULGULAR: Materyallerin pH değeri düştükçe yüzey pürüzlülük değerlerinin arttığı ve en büyük değişimin ise geleneksel cam iyonomer ve nano iyonomer grubunda olduğu bulgulandı. Giomerin ise düşük yüzey pürüzlülüğü gösterdiği bulgulandı.

SONUÇ: Cam iyonomer içerikli restoratif materyallerde pH değişikliğinin yüzey pürüzlülüğüne etkisinin materyalin yapısına bağlı olduğu belirlenmiştir. Rezin içeriği fazla olan restoratif materyallerin düşük pH’den daha az etkilendiği görülmüştür.

Anahtar Kelimeler

Cam İyonomer, Giomer, Nano İyonomer, Yüzey Pürüzlülüğü

Kaynakça

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