The aim was to assess the presence of smear layer after canal instrumentation with two reciprocating rotary systems and a continuous motion one. Thirty canals were shaped with Reciproc, WaveOne or Mtwo systems. Smear layer was assessed following a three value scale at coronal, middle and apical levels with a scanning electron microscopy. Reciproc scores: coronal third, 20% of the cases: 0, 60%:...

The present study aimed to measure the number of cycles fracture (NCF) different instruments using pecking motion at constant and varying distances movement body temperature. This included 20 files from each brand: ProTaper Universal F2, Next X2, WaveOne Gold Primary (Dentsply Sirona, Maillefer, Ballaigues, Switzerland). Instruments brand were divided into two groups (ten for group) that experi...

Introdução: Lima ProtaperUltimate foi uma vantagem inovadora para o profissional, porque permite tratar ampla variedade de desafios anatômicos na prática clínica, esse sistema também que clínico realize preparos canais minimamente invasivos, mais conforme as outras limas nem todas são 100% boas, pois chega um momento operador está usando a lima e mesmas irá ter fraturas. Objetivo: Conhecer os b...

Aim- To evaluate the removal of gutta percha by hand file system, rotary system and reciprocating from root canals using CBCT. Materials Method: Root 42 extracted human mandibular premolars were prepared ProTaper Universal then obturated. filling quality was confirmed on CBCT images. Specimens divided into 3 groups (n = 14) according to used for removal, group 1: H File, 2: MTwo retreatment fil...

INTRODUCTION The aim of this study was to compare different obturation techniques in terms of the percentage of gutta-percha filled areas (PGFA), sealer filled areas (PSFA), and voids in straight root canals prepared with different instruments. METHODS One hundred sixty extracted single-rooted mandibular premolars with straight canals were allocated into 10 groups (n = 16 teeth per group): A,...

Background and Aim: Debris and the smear layer that remain after root canal preparations may result in failure of root canal therapies. The aim of this study was to compare the smear layer formation and the amount of residual debris following the use of WaveOne and ProTaper rotary files in mesiobuccal root canals of upper first molars by scanning electron microscopy (SEM). Materials and Method...