In-vitro Comparison of Hero 642 Protaper Ni-Ti Rotary Systems and K-Files in Primary Teeth Root Canal Preparation Regarding Preparation Safety and Time

Abstract

The aim of this study was to compare two NiTi rotary instrument systems ProTaper-Hero 642 with K-files, regarding preparation safety and time. Fifty four 27 maxillary and 27 mandibular primary molars were randomly divided into three groups each having 18 teeth 9 maxillary and 9 mandibular . In Group H the root canals were prepared using Hero 642 system, In Group P the root canals were prepared using ProTaper system and in Group K the root canals were prepared manually with K-files. The groups were compared regarding perforation, file fracture and preparation time. Perforation and instrument fracture were assessed with t-test for two independent proportions, and the Kruskall-Wallis test was used to assess differences in preparation time. There were no statistically significant differences according to perforations and instrument fractures between groups according to total number of prepared canals and canal types MB, ML, DB, DL, M, D, P . The number of perforations in Group P was statistically higher than Group H when the groups were compared according to the total number of teeth p

Keywords

• Root Canal Treatment, Rotary System, Primary Teeth, Hero 642, Protaper

Süt dişi kök kanal tedavisinde Hero 642 protaper Ni-Ti döner sistemler ve K tipi eğenin preparasyon güvenliği ve süresi açısından in-vitro olarak karşılaştırılması

Abstract

Bu çalışmada iki Ni-Ti döner alet sisteminin ProTaper- Hero 642 K tipi eğe ile preparasyon güvenliği ve süresi bakımından karşılaştırılması amaçlanmıştır gruba ayrıldı. Grup H de kanallar Hero 642 döner alet sistemi ile Grup P de ProTaper döner alet sistemi ile Grup K de ise K tipi eğe ile prepare edildi. Gruplar perforasyon, alet kırığı ve preparasyon süresi bakımından karşılaştırıldı. Veriler değerlendirilirken perforasyon ve alet kırığı için oranlar arası farka ait t-testi, preparasyon süresi için ise Kruskall-Wallis testi kullanıldı. Gruplar arasında, prepare edilen toplam kanal sayısına ve kanal tiplerine MB, ML, DB, DL, M, D, P göre perforasyon ve alet kırığı açısından anlamlı fark bulunmamıştır p>0.05 . Hazırlanan diş sayıları dikkate alındığında ise, Grup P’deki perforasyon oranı Grup H’ ye göre istatistiksel olarak anlamlı bulunmuştur p˂0.05 . Gruplar preparasyon süreleri açısından karşılaştırıldığında en kısa sürenin Grup H için, en uzun sürenin ise Grup K için harcandığı ve gruplar arasındaki farkın istatistiksel olarak anlamlı olduğu tespit edilmiştir p

Keywords

• Kök kanal tedavisi, Döner alet sistemi, Süt dişleri, Hero 642,ProTaper

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