Influence of different types of automated devices on the shaping ability of rotary nickel‐titanium FlexMaster instruments

Abstract

All systems respected original root canal curvature well and were safe, indicating that torque-limited rotation handpieces are suitable for preparing curved root canals.

The influence of various automated devices on the shaping ability of Mtwo rotary nickel‐titanium instruments

“…Several automated devices have been developed including electric high‐ and low‐torque control motors (Gambarini 2000, 2001, Hülsmann et al. 2005) and torque‐limited rotation handpieces (Yared & Sleiman 2001, Dammaschke & Schäfer 2004, Schäfer et al. 2005).…”

“…2005). In a previous study it has been shown that both electric low‐torque control motors and torque‐limited air‐driven handpieces are suitable for the preparation of curved canals and were at the same time safe to use (Schäfer et al. 2005).…”

“…Hence, it can be speculated that this might result in a higher frictional resistance. Therefore, the question arises whether Mtwo instruments can be set into rotation with an air‐driven torque‐controlled handpiece without an increased risk of instrument separation, as already described for FlexMaster instruments (VDW) when used in a crowndown sequence (Schäfer et al. 2005).…”

Comparison of the Shaping Ability of RaCe and FlexMaster Rotary Nickel-Titanium Systems in Simulated Canals

“…Overall, the data on RaCE instruments probably reflects the various instrument sequences used as well as the different experimental models utilized. Fractures of FlexMaster instruments have also been reported (5,6,20); this indicates that all systems have the potential to fracture, particularly in narrow curved canals. Controlling working length during root canal treatment is essential.…”

Problems with a Cordless Endodontic Hand Piece when Preparing Severely Curved Root Canals

“…When comparing an Endo IT and SiroNiti angle handpiece, Schäfer et al determined a significantly shorter preparation time when using the Endo IT device [27]. The torque control for triggering the magnetic coupling of the SiroNiti handpiece is mechanical.…”