introduction: the objective of this study was to compare the shaping ability of three rotary filing systems; constant taper k3 instruments, constant taper profile instruments and progressive taper protaper rotary instruments in clear resin blocks with simulated curved root canals. materials and methods: forty five resin blocks were divided into three groups. group a preparation was conducted wi...

High speed instruments are versatile instruments used by clinicians of all specialties of dentistry. It is important for clinicians to understand the types of high speed handpieces available and the mechanism of working. The centers for disease control and prevention have issued guidelines time and again for disinfection and sterilization of high speed handpieces. This article presents the rece...

The fundamentals of root canal therapy include thorough cleaning, suitable shape, and total filling. There are numerous tools at our disposal to help us achieve these goals. A complicated range files, filling techniques, modern materials have been designed speed up the process, increase its dependability, enable clinician properly treat challenging patients intricate anatomies. Hand instruments...

This study investigated the incidence of hand and rotary instrument separation (IS) in the endodontics graduate program at the University of Pennsylvania between 2000 and 2004. In 4,865 endodontic resident cases the incidence of hand and rotary IS was 0.25% and 1.68%, respectively. The odds for rotary IS were seven times more than for hand IS. The probability of separating a file in apical thir...

AIM Cleaning and shaping is one of the most important phases in root canal therapy. Various rotary NiTi systems minimize accidents and facilitate the shaping process. Todays NiTi files are used with air-driven and electric handpieces. This study compared the canal centering after instrumentation using the ProTaper system using Endo IT, electric torque-control motor, and NSK air-driven handpiece...

BACKGROUND AND AIMS Dental handpiece is a source of contamination because it is in constant touch with the oral cavity. Sterilization does not seem to be sufficient to prevent penetration of microorganisms into air and water lines of the unit, because negative pressure developed by valves (which are placed in water outlets) and post shut-off inertial rotation of handpiece result in water and de...

Triangulation and histological studies were made of skin ablation depths following skin treatments with a Fotona Dynamis Er:YAG laser system. The following laser handpieces were used in the study: Full beam handpieces R04 and R11; Stamping patterned handpieces PS01, PS02 and PS03; fractionated handpiece FS01 and c) Scanning fractional handpiece F22. The laser fluence (F) was found to be the maj...

Introduction: Dentistry is a profession that, being exposed to great biological risk, requires strict compliance not only with biosafety standards but also the disinfection and sterilization processes of instruments used in clinical practice, including dental handpieces. Objective: To determine attitude level knowledge about handpieces, by students Faculty University Cuenca. Materials Methods: ...

The purpose of this study was to record and compare audiometric pure tone thresholds of dental clinicians (DCs), dental professionals (DPs), and dental students (DSs); determine the percentage of these groups who use hearing protection devices while at work in the clinic; and measure the sound intensities generated by a few representative high-speed handpieces while they are being used on patie...