Background: The aim of the present study was to evaluate canal transportation and centering ability ProTaper, HeroShaper two Ni-Ti rotary systems developed for retreatment (ProTaperRetreatment R-Endo). Materials Methods: One hundred twenty mesial canals mandibular molars with curvatures between 30-40 degrees radii 4-9 mm were embedded in a modified muffle system. teeth randomly divided into 8 g...

Adresa za dopisivanje Prof. dr. Carlos Menezes Aguiar Rua Aristides Muniz, 70/501 Boa Viagem Recife PE 51020-150 Brazil telefon: 55 81 3467 6821 [email protected] Sažetak Svrha istraživanja: Željela se procijeniti učinkovitost sustava ProTaper Universal RetreatmentTM i ručnih instrumenata kod endodontske revizije korištenjem dvaju otapala gutaperki – Orange Oila i Eucalypthola. Materij...

OBJECTIVE To evaluate the effect of number of uses, angle and radius of curvature and type of instrument on the fracture of ProTaper rotary instruments when used by undergraduate students. STUDY DESIGN Three hundred and seventy-six molars, with a total of 1114 root canals, extracted were instrumented by undergraduate students using ProTaper instruments according to the manufacturer´s recommen...

INTRODUCTION The purpose of this study was to assess torque and force for simulated canal preparation with a new root canal instrument, ProTaper Next. METHODS Six sets of ProTaper Next Instruments (X1-X5) were used to prepare 36 artificial canals. Files were divided into 6 groups. Different settings of rotations per minute (250, 300, and 350 rpm) and numbers of in-and-out movements to reach w...

  Aim: The aim of this study is to evaluate the retreatability bioceramic sealers (Endosequence BC, Totalfill MTA-Fillapex) used with single cone obturation technique. Materials and methods: Root canal forty rooted human mandibular premolar teeth were prepared ProTaper Next rotary system up X3 obturated technique (n=10) using endosequence BC (A), Totallfill (B), MTA-Fillapex (C) Zinc oxide...

BACKGROUND Complete removal of old filling material during root canal retreatment is fundamental for predictable cleaning and shaping of canal anatomy. Most of the retreatment methods tested in earlier studies have shown inability to achieve complete removal of root canal filling. Therefore the aim of this investigation was to assess the efficacy of three different rotary nickel titanium retrea...

The purposes of this study were to evaluate the ability of a group of third-year dental students without any endodontic clinical experience to use the ProTaper Instruments (Dentsply Maillefer) to decrease the amount of straightening of curved canals on human molar teeth and to determine the incidence of instrument fractures and instrumentation time. Thirty-one undergraduate dental students in T...

INTRODUCTION The aim of this study was to compare the dentine removing efficacy of Gates-Glidden drills with hand files, ProTaper and OneShape single-instrument system using cone-beam computed tomography (CBCT). METHODS AND MATERIALS A total of 39 extracted bifurcated maxillary first premolars were divided into 3 groups (n=13) and were prepared using either Gates-Glidden drills and hand instr...