Microhardness and corrosive wear of dental composite materials in alkaline media

Özet

Amaç: Bu çalışmanın amacı komporosertlik ve koroziv aşınmalarını ine Materyal ve Metot: Dental kompo: su emilimi ile ilişkilidir. Bu çalışm ortamında "packable" kompozitleri e internal korozyonlan incelendi ve ler ve ormoserlerle karşılaştırıldı ve düşük pH değerli ortamlarda korozyon çok yavaş ilerler. Bu ne da alkali ortam kullanılmıştır. Çal: kompozit materyallerin (solitaire, Admira, 2-100, TPp ve Silux Plus) h çapta, 3mm kalınlıkta 8 silindirik Örnekler O.IN NaOH ortamında, bekletildi. Örneklerin kütle değişimli değerlerindeki değişimler kaydedildi Bulgular: Sonuçlar , incelenen ma istatistiksel olarak anlamlı (p

Abstract

Objective: The purpose of this study was to examine the corrosive wear and the microhardness of tooth colored composite resins. •Material and Method: The internal corrosion of den-tal resin composites is associated with water-sorpti-on. In this study, the internal corrosion and microhardness of packable composites in 0,1 N NaOH were determined and changes compared with those microhybridresins and ormocers. Internal corrosion in water, artificial saliva and in media of low pH is time consuming, because the degradation process in these environments is extremely slow. In considering this limitation of above media, an alkaline medium has been used in this study to simulate corrosive-wear of 7 composites. For each material namely Solitaire, Surefil, Definite, Admira, Z-IOOJPH and Silux Plus, eight cylindirical specimens of 10 mm. diameter and 3 mm thickness were prepared accor-ding to manifacturers' instructions. The procedure consists of exposing each material to 0,1 N NaOH at 60sC for 2 weeks. Then the mass change and the microhardness of the materials were determined. Results: The results indicated statistically significant differences (p