introduction: the success of endodontic retreatment is related to the complete removal of the obturation material from the root canal system. the aim of this study was to evaluate the efficacy of mtwo r and protaper retreatment files in removing the resilon/epiphany system with or without chloroform during retreatment. materials and methods: sixty distal roots of first mandibular molars were pr...

AIM The aim of the study is to compare the maximum stress distribution on the rotary retreatment instruments within the root canal at cervical, middle, and the apical one-third during retreatment of gutta-percha. MATERIALS AND METHODS A human mandibular premolar was scanned, and three-dimensional geometry of the root was reconstructed using finite element analysis (FEA) software package (ANSY...

Previous studies have shown that retreatment of relapsed/refractory multiple myeloma (MM) with a second course of bortezomib therapy could be effective in heavily pre-treated patients. In this study, the results of a multicentre, retrospective survey were reported involving patients in Switzerland with MM who responded to initial bortezomib therapy; 43 patients were enrolled and 42 were evaluat...

Background and Aim: Complete removal of gutta-percha from the root canal system and its remnants is a challenge in endodontic retreatment. This ex-vivo study aimed to assess the efficacy of XP-Endo Finisher R (XEFR) in removing root filling remnants from straight canals of mandibular premolars in root canal retreatment.   Materials and Methods: In this ex-vivo study, 30 single-rooted mandib...

Background: To study rotary retreatment systems in removal of gutta-percha and sealer.Materials methods: A total 15 subjects were enrolled. The samples randomly divided into three groups according to the file system used remove was performed (n=5): ProTaper Universal Retreatment, NEXT Edge File XR NiTi system. p- value less than 0.05 considered statistically significant. Results: percentage roo...

introduction:differentiated thyroid carcinoma (dtc) follow-up after thyroidectomy and radioiodine-ablation is performed mainly by thyroglobulin (tg), diagnostic iodine-131 whole body scan (dxwbs) and sonography. some patients with undetectable tg have thyroid-bed uptake after ablation in whom decision making regarding the need for retreatment is still controversial. methods: in this study, we e...

BACKGROUND Complete removal of old filling material during root canal retreatment is fundamental for predictable cleaning and shaping of canal anatomy. Most of the retreatment methods tested in earlier studies have shown inability to achieve complete removal of root canal filling. Therefore the aim of this investigation was to assess the efficacy of three different rotary nickel titanium retrea...

INTRODUCTION Endodontic retreatment is a complex intervention that requires detailed analysis of possible reasons for failure, and flawless practical execution of the procedure. OBJECTIVE The aim of the study was to assess the outcome of endodontic retreatment based on clinical and radiographic criteria after a two-year observation period. METHODS Clinical study included 49 teeth indicated ...

OBJECTIVE The goal of present study was to determine the effect of different nickel-titanium file systems on the amount of apically extruded debris during endodontic retreatment: D-RaCe retreatment systems, EdgeFile XR retreatment rotary files, and Reciproc R40. MATERIALS AND METHODS Thirty-six single-rooted prepared mandibular premolar teeth were filled with Gutta-percha and AH Plus sealer. ...

BACKGROUND To evaluate the fulfillment of retreatment criteria in recurrent neovascular age-related macular degeneration (nAMD) for a pro-re-nata treatment regime with ranibizumab in routine clinical care. METHODS Data from patients with treatment-naive nAMD were analysed retrospectively. As an 'upload', all patients had received three-monthly intravitreal ranibizumab injections in a universi...