Avaliação da eficácia dos diferentes instrumentos rotatórios no retratamento endodôntico
Journal Title: RSBO - Year 2008, Vol 5, Issue 2
Abstract
Objective: The purpose of this study was to compare in vitro the effectiveness of removing guta-percha from root canals using differents rotatory instruments. Material and methods: Sixty human inferior premolars have been used, which were instrumented with GT hand files up to #30 taper .04 and obturated using Tagger’s hybrid technique. The retreatment has been based in the following instruments: ProFile (group I), ProTaper (group II), GT (group III), Manual-Control (group IV), K3 (group V), and Hero (group VI). Radiographies were taken in vestibular orientation, scanned at resolution 480DPI and analyzed by computer for the observation of the remnant parts of obturation materials after retreatment. The roots have been divided in 1/3 cervical, medium and apical, and scores were attributed as per the following scale: 0 (absence of remnant materials), 1 (up to 25%), 2 (up to 50%), and 3 (over 50%). The scores of obturation remnant materials for the differents tested instruments were statistically assessed by means of the Krusckal-Wallis’ method. Results: There was statistical difference among the instruments (p < 0.01). The group instrumented using Hero and K3 differed from the remaining groups, which presented best results. The control group (manual), in spite of presenting low values, as well as the remaining groups, when appraised by thirds has shown a greater quantity of remaining material at the apical third. Conclusion: The ProFile, ProTaper, GT, and Manual groups have presented more outstanding results, notwithstanding the absence of meaningful statistical difference among them.
Authors and Affiliations
Juarez GARCIA JÚNIOR, Ulisses SILVA NETO, Everdam CARNEIRO, Vânia WESTPHALEN, Luiz FARINIUK, Rivail FIDEL, Sandra FIDEL
Keywords
Related Articles
- EP ID EP144737
- DOI -
- Views 184
- Downloads 0
Physiological and pathological factors and mechanisms in the process of root resorption in primary teeth
Introduction: Tooth resorption is essential in the process of root resorption in primary teeth. However, pathological root resorption, mainly the inflammatory one, is a consequence and/or complication of several clini...
In vitro evaluation of the microhardness of normal and sclerotic bovine dentin
Introduction: The literature shows different characteristics between normal and sclerotic dentin. Hardness is a property that has been very used to compare restorative materials and biological tissues. Objective: The aim...
Evaluation of the endodontic treatment influence on the bond strength of fiber posts reinforced by a restorative composite
Introduction and objective: Fiber posts are widely used to increase the mechanical strength of the restorations. The aim of this study was to evaluate the bond strength of fiber posts reinforced by a restorative composit...
The performance of ProTaper system during the endodontic retreatment
The development of new rotary instruments for endodontic treatment demands new studies to evaluate their efficacy on the retreatment of root canals.The scope of this study was to analyze the partial or total removal of t...
Morphometric study of length and grooves of lower central incisors roots
Introduction: Root grooves are considered a risk factor for periodontal disease. The purpose of this study was to measure the length of the root of lower central incisors (LCI), as well as the width and depth of the conc...