SİMÜLE KÖK KANALLARINDA BEŞ FARKLI NİKEL-TİTANYUM DÖNER ALETİN ŞEKİLLENDİRME YETENEĞİ

Öz

Amaç: Bu çalışmanın amacı dört adet güncel alet  (HeroShaper, Mtwo, ProTaper, RaCe) ile yakın tarihte üretilmiş bir aletin (Revo-S) şekillendirme yeteneklerinin simüle kök kanallarında karşılaştırılmasıdır.  Gereç ve yöntem: Nikel-Titanyum sistemler S şekilli ve 34-35° eğimli şeffaf rezin blokların (her bir grup için n=15 rezin blok) genişletilmesinde kullanıldı.  Kaldırılan rezin miktarı bir stereomikroskop altında işlem öncesi ve sonrası görüntüler karşılaştırılarak ölçüldü. Transportasyonun yönü ve miktarı, merkezde kalma yeteneği ve toplamda kaldırılan rezin miktarı tespit edildi. Kanaldan sapma insidansı, preparasyon zamanı ve alet deformasyonu kaydedildi.  Bulgular: RaCe grubu her iki kanal tipinde kanalları daha hızlı bir şekilde (P < 0.05) ve kanalda sapma oluşturmadan genişletti. ProTaper Universal grubu her iki kanal tipi için diğer gruplardan anlamlı şekilde yavaştı (P < 0.05). Gittikçe genişleyen kanal formu 34-35° eğimli kök kanallarında Mtwo, ProTaper Universal ve RaCe gruplarında, S şekilli kanallarda ise sadece RaCe grubunda gözlendi. HeroShaper, Mtwo ve Revo-S gruplarında hiç alet kırığı tespit edilmezken bazı eğelerde deformasyon gözlendi.  Sonuç: RaCe Nikel-Titanyum döner aletleri muhtemelen değişken kesici kenarlara sahip üçgen kesitleri ve çok sayıda aleti kapsayan eğe serisi nedeniyle daha az kanaldan sapma ve daha merkezi bir şekillendirme ortaya koydu.

Anahtar Kelimeler

• Nikel–Titanyum döner aletler, RaCe, Revo-S, S-şekilli simüle kanal

THE SHAPING ABILITY OF FIVE DIFFERENT NICKEL-TITANIUM ROTARY INSTRUMENTS IN SIMULATED ROOT CANALS

Öz

 Purpose: The aim of this study was to compare the shaping ability of a recently introduced instrument (RevoS) in comparison with the four current instruments (HeroShaper, Mtwo, ProTaper, RaCe) in simulated root canals.  Material and methods: Nickel-Titanium systems (n=15 resin in each case) were used to prepare 34-35° curved and S-shaped simulated root canals in clear resin blocks. The width of resin removal was measured by comparing the pre- and postoperative images under a stereomicroscope. The amount and direction of transportation, the centering ability and the total amount of resin removal were determined. Canal aberration incidence, preparation time, and instrument deformation were also recorded.  Results: In both canal types, the RaCe group prepared canals more rapidly (P < 0.05) and created no canal aberrations.  The ProTaper Universal group was significantly slower than other groups (P < 0.05) for both canal types. The tapered canal form was obtained in the Mtwo, ProTaper Universal; and RaCe groups in 34-35° curved canals; and only the RaCe group in S-shaped canals. Some deformations but no instrument fractures were observed for HeroShaper, Mtwo, and Revo-S groups.  Conclusion: RaCe rotary Nickel-Titanium instruments, probably do to their triangular cross-sectional shape with alternating cutting edges and sequence encompassing a high number of instruments, exhibited a better centrally shaping and fewer canal aberrations.

Anahtar Kelimeler

• Nickel–Titanium Rotary Instruments, RaCe

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