Safety and effectiveness of additional apical preparation using a rotary heat-treated nickel titanium file with larger diameter and minimum taper in retreatment of curved root canals.
The aim of this study was to investigate the effect of additional apical preparation using the ProDesign Logic (PDL) 50/.01 rotary heat-treated nickel-titanium (NiTi) file with a larger diameter and minimal taper for retreatment of curved root canals. Materials and methods: Mesial curved root canals of 12 mandibular molars were prepared using PDL 25/.06 and filled […]
Avaliação da capacidade de limpeza de dois sistemas rotatórios de níquel-titânio: ProTaper Universal e ProDesign S tratado termicamente
Introdução: a finalidade da instrumentação endodôntica é promover a limpeza e modelagem do canal radicular, preparando para posterior obturação definitiva. Objetivo: o objetivo desse estudo foi avaliar, in vitro, a qualidade da limpeza de blocos de canais simulados, instrumentados por dois sistemas rotatórios de níquel-titânio. Métodos: foram utilizados 20 blocos de acrílico (canais simulados), que foram […]
Evaluation of apical transportation and centring ability of five thermally treated NiTi rotary systems
Aim To evaluate apical transportation and centring ability during root canal preparation in mesial root canals of mandibular molars associated with ProTaper Gold (PTG), ProDesign S (PDS), Hyflex CM (HCM), Hyflex EDM and ProDesign Logic (PDL). Methodology Sixty mandibular first molars with two separate canals in the mesial root were selected after root anatomy pairing […]
Cyclic Fatigue Resistance of Heat-Treated Nickel-Titanium Instruments
This study compared the cyclic fatigue resistance (CFR) of new instruments manufactured by heat-treated nickel-titanium wire. Methods and Materials: Ninety-six new instruments from HyFlex CM (HF), Edge File (EF), Pro Design S (PDS/L) and Mtwo (MT) (20/0.06 and 25/0.06) (n=12) systems were evaluated. A stainless steel device was used and time and number of cycles […]
