AIM To evaluate root canal transportation at the major foramen through the use of stainless steel size 08 K-Flex files, size 10 reamers, and XF finger spreaders when used as patency instruments. METHODOLOGY One hundred and two mesiobuccal canals of maxillary and mandibular first molars were randomly divided into three groups (34 canals each). Size 08 stainless steel K-Flex files, size 10 stai...

INTRODUCTION Procedural accidents have a negative effect on healing and might contribute to the persistence of infections in inaccessible apical areas, requiring surgical intervention. This report describes a case of persistent apical periodontitis of a lower left first molar associated with the sinus tract and a periapical lesion that required nonsurgical endodontic retreatment and apical surg...

introduction: the purpose of this ex vivo study was to determine the releasing characteristics and doxycycline dentinal diffusion of ah26 sealer-doxycycline combination from apical 3mm of tooth root and apical foramen . materials & methods: one-hundred and two recently extracted single-rooted human teeth were decoronated and prepared with #3 and #4 gates-glidden drills and rotary mtwo files. sm...

introduction an in vitro study was performed to determine the number and the type of root canals of mandibular incisor teeth in an iranian population. methods and materials sixty eight mandibular incisor teeth were immersed in india ink decalcified and cleared. results it was found that 55.9% of the teeth had two canals that in 51.5% of them the canals merged into one canal before exiting the t...

Background: This study aimed to compare the continuous rotation and reciprocating movements of rotary files in achieving apical patency root canal retreatment. Materials Methods: vitro, experimental evaluated 64 extracted mandibular molars. The teeth were prepared up F3 with ProTaper Universal obturated using lateral compaction technique. divided into four groups (n = 16) based on mesiobuccal c...

Received: July 28, 2009; Revised: November 23, 2009; Accepted: February 9, 2010 Corresponding author: Yi-Shing Shieh, Department of Endodontics, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-gong Road, Taipei 114, Taiwan, Republic of China. Tel: +8862-87919276; Fax: +886-2-87919276; E-mail: ndmcyss@ nhri.org.tw Sodium Hypochlorite Accidentally Extruded Be...

Introduction The quality guideline of Endodontics st residual pulp tissue maintenance of the during enlargement root canal instrum prepared root canal s tapering conical sh apical foramen and t without transportatio concluded that non techniques or devi completely clean roo roots (3-5). Arguab manual root canal shown to be super devices (3,6). Ho demonstrated that automated devices u (Ni-Ti) in...

The aim of this paper is to present a new method based on numeric calculus to provide data on any type of root canal curvature at any point of the long axis of the canal. Twenty severely curved, simulated root canals were prepared with rotary FlexMaster and Profile instruments in the crown-down technique and manually in the step-back technique. The inner and outer curvatures were registered in ...