Bir Devrim: Nikel Titanyum Eğelerinin Gelişimi
Özet
Kök kanallarını şekillendirmek ve genişletmek için farklı içeriğe sahip eğe sistemleri (Paslanmaz çelik, krom-kobalt ve Nikel-Titanyum) üretilmiştir. Her yeni üretilen eğe sistemi farklı özellikler taşır. Değişik içeriğe sahip bu eğelerin kendi aralarında farklı avantaj ve dezavantajları bulunmaktadır. Günümüzde kanal preparasyonu yapılırken Nikel-Titanyum (NiTi) eğe sistemleri daha çok tercih edilmektedir. NiTi aletlerin kök kanal tedavisinde kullanılması endodontiye yeni bir dönem kazandırmıştır. NiTi alaşımından üretilen eğeler özellikle eğimli kanallarda daha hızlı ve kısa sürede kök kanal preperasyonu yapılabilmesini sağlamıştır. NiTi eğelerin efektif kullanımına rağmen, endodontik tedavi uygulamalarında bu eğelerin kullanımında dikkatli davranılmalıdır. Aksi taktirde eğelerin tekrarlayan kullanımları nedeniyle alet kırılmalarıyla karşılaşılabilir. Bu eğe sistemleri tanıtıldıktan sonra alaşımın metalürjik, mekanik ve fiziksel özelliklerinde yapılan değişikliklerle yeni rejenerasyon eğeler geliştirilmiştir. NiTi eğeleri kullanan diş hekimleri bu eğelerdeki tasarım değişikliklerini, sistem güncellemelerini ve jenerasyonlar arası farklılıkları iyi takip etmelidir. Ayrıca eğeleri bu farklılıklarıyla değerlendirebilmeli ve vakaya özel kullanabilmelidir. Bu derlemede NiTi eğelerinin tarihçesi, jenerasyonları, tasarım özellikleri ve kullanımının getirdiği sonuçlar ele alınmaktadır.
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