Background: The aim of this study was to evaluate the cyclic fatigue and torsional resistance three thermally treated rotary instruments, such as: Logic 2 25.05 (LOG 25.05), Edge Taper Platinum 25.06 (EDT 25.06) ProTaper Gold 25.08 (PTG 25.08).Methods: A total 60 instruments LOG 25.05, EDT PTG were used (n=20). Cyclic tests performed at 36°C using an artificial stainless steel canal with...

This work is to reveal and present some contemporary surface treatment methods used in view of improving performance parts a variety metals alloys. Stainless steels titanium alloys are with the group particular focus, important for medical implants chirurgy instruments dentistry. Improved, anti-corrosion properties mechanical strength materials primary features examination.

procedural accidents and obstacles to normally routine therapy, at almost any stage of treatment. One of these procedural problems is intracanal instrument fracture. Fractured root canal instruments may include endodontic files (Figure 1) and Gates Glidden burs. Instruments are made from nickel titanium (NiTi), stainless steel or carbon steel. Fracture often results from incorrect use or overus...

Nickel-titanium (NiTi) instruments are commonly used for shaping the root canal system in endodontic practice. They are more flexible and have better cutting efficiency than conventional stainless steel files. The superelasticity of NiTi rotary files allows the clinicians to produce the desirable tapered root canal form with a reduced tendency to canal transportation and instrument fracture. Hy...