BACKGROUND Primary root canals are considered to be most challenging due to their complex anatomy. "Wave one" and "one shape" are single-file systems with reciprocating and rotary motion respectively. The aim of this study was to evaluate and compare dentin thickness, centering ability, canal transportation, and instrumentation time of wave one and one shape files in primary root canals using a...

introduction: to compare the cleaning effectiveness of k3 and race niti rotary systems with k-flexo file instruments during the preparation of curved canals in extracted human teeth. materials and methods: a total of 50 root canals of mandibular and maxillary molars with curvatures ranging between 25º and 35 º were divided in three groups of 15 each and 5 as negative control groups. canals were...

Introduction: The purpose of this study was to evaluate surface topography of WaveOne Gold (WOG) and WaveOne (WO) files using SEM before and after use. Methods: Twelve primary files from each system were scanned for surface defects before instrumentation at 100x and 750x. Each file was planned ti be used to instrument six root canals and then examined under SEM after preparing one, three and six...

introduction: this in vitro study aimed to assess the effectiveness of a single-file rotary system (oneshape) in reduction of intracanal bacteria. methods and materials: eighty one single-rooted mandibular first premolars with single canals were used. six samples were selected as aseptic control group. seventy five remaining specimens were infected by enterococcus faecalis and incubated for 72 ...

AIM The purpose of this study was to determine the amount of extruded debris and irrigant associated with different single-file systems and one multiple-file system. MATERIALS AND METHODS Forty-five newly extracted single rooted primary canine teeth were used in this study. The root canals were instrumented using the reciprocating single-file system, the single-file rotary system and the mult...

Inserting instrumentation code in a program is an effective technique for detecting, recording, and measuring many aspects of a program’s performance. Instrumentation code can be added at any stage of the compilation process by specially-modified system tools such as a compiler or linker or by new tools from a measurement system. For several reasons, adding instrumentation code after the compil...

INTRODUCTION The ability of single-file, reciprocating instruments to remove inorganic debris is uncertain. By using micro-computed tomography (microCT), this study compared the 3-dimensional distribution, quantity, and density of remaining inorganic debris in the mesial root of mandibular molars after instrumentation. A single reciprocating file was compared with a multifile rotary instrumenta...

OBJECTIVE This study was designed to quantitatively evaluate the amount of dentin debris extruded from the apical foramen by comparing the conventional sequence of the ProTaper Universal nickel-titanium (NiTi) files with the single-file ProTaper F2 technique. STUDY DESIGN Thirty mesial roots of lower molars were selected, and the use of different instrumentation techniques resulted in 3 group...