نتایج جستجو برای: dentinal crack

تعداد نتایج: 26036  

Journal: :Brazilian oral research 2012
Shelon Cristina Souza Pinto Camila Maggi Maia Silveira Márcia Thaís Pochapski Gibson Luiz Pilatt Fábio André Santos

The objective of this study was to analyze the effects of toothbrushing with desensitizing toothpastes on dentin permeability and dentinal tubule occlusion. Fifty rats provided two hundred incisor teeth divided into five groups: DW, brushed with distilled water (control); FT, brushed with fluoride toothpaste; SCT, brushed with strontium chloride toothpaste; PCT, brushed with potassium citrate t...

Journal: :Journal of endodontics 2014
Gustavo De-Deus Emmanuel João Nogueira Leal Silva Juliana Marins Erick Souza Aline de Almeida Neves Felipe Gonçalves Belladonna Haimon Alves Ricardo Tadeu Lopes Marco Aurélio Versiani

INTRODUCTION This study aimed to evaluate the frequency of dentinal microcracks observed after root canal preparation with 2 reciprocating and a conventional full-sequence rotary system using micro-computed tomographic analysis. METHODS Thirty mesial roots of mandibular molars presenting a type II Vertucci canal configuration were scanned at an isotropic resolution of 14.16 μm. The sample was...

Journal: :International endodontic journal 2014
H Arslan I D Capar G Saygili T Gok M Akcay

AIM To compare the efficacy of photon-induced photoacoustic streaming (PIPS) technique with conventional, sonic and ultrasonic irrigation on the removal of apically placed dentinal debris from an artificial groove created in a root canal. METHODOLOGY Root canal preparation was performed up to size 40 on 48 extracted single-rooted teeth using ProTaper rotary instruments. The specimens were the...

Journal: :Brazilian oral research 2010
Camila Tirapelli Heitor Panzeri Rodrigo Gongalves Soares Oscar Peitl Edgar Dutra Zanotto

Dentin hypersensitivity (DH) is a painful response to stimulus applied to the open dentinal tubules of a vital tooth. It's a common oral condition, however, without an ideal treatment available yet. This work evaluated in vitro the effect of micron-sized particles from a novel bioactive glass-ceramic (Biosilicate) in occluding open dentinal tubules. A dentin disc model was employed to observe c...

Journal: :Journal of endodontics 2015
Gustavo De-Deus Felipe Gonçalves Belladonna Erick Miranda Souza Emmanuel João Nogueira Leal Silva Aline de Almeida Neves Haimon Alves Ricardo Tadeu Lopes Marco Aurélio Versiani

INTRODUCTION The aim of the present study was to evaluate the frequency of dentinal microcracks observed after root canal preparation with ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland) and Twisted File Adaptive (TFA; SybronEndo, Orange, CA) systems through micro-computed tomographic analysis. METHODS Twenty moderately curved mesial roots of mandibular molars presenting a ty...

2008
Miriam F. Zaccaro Scelza Jeffrey M. Coil Ana Carolina de Carvalho Maciel Lílian Rachel L. Oliveira Pantaleo Scelza

This study compared, by scanning electron microscopy (SEM), the efficacy of three solvents on the removal of filling materials from dentinal tubules during endodontic retreatment. Forty human maxillary canines with straight canals were prepared according to a crown-down technique and enlarged to a#30 apical file size, before obturation with gutta-percha and a zinc-oxide-eugenol based sealer. Th...

Journal: :Archives of oral biology 2011
Min Lin ShaoBao Liu Lin Niu Feng Xu Tian Jian Lu

OBJECTIVES The initiation of the pain sensation experienced following the thermal stimulation of dentine has been correlated with fluid flow in the dentinal tubules. There may be other mechanisms. METHODS This study examines this possibility using a mathematical model to simulate the temperature and thermal stress distribution in a tooth undergoing thermal stimulation. The results obtained we...

2015
Liza George D Kandaswamy

BACKGROUND The purpose of this study was to evaluate the effect of dehydration of resin-modified glass ionomer powder/liquid system, resin-modified glass ionomer paste/paste luting cements in three different quantities and to compare them with a conventional glass ionomer luting cement using confocal laser scanning microscope. MATERIALS AND METHODS A conventional glass ionomer (Group I), a re...

Journal: :iranian endodontic journal 0
masoud parirokh department of endodontics, dental school, kerman university of medical sciences, kerman, iran mohammad jafar eghbal department of endodontics, dental research center, shaheed beheshti university of medical sciences, tehran, iran saeed asgary department of endodontics, iranian center for endodontic research, dental school, shaheed beheshti university of medical sciences, tehran, iran. jamileh ghoddusi department of endodontics, dental school, mashhad university of medical sciences, mashhad, iran sally stowe facility coordinator, electron microscope unit, australian national university, canberra, australia farshid forghani department of endodontics, dental school, kerman university of medical sciences, kerman, iran

introduction : this study was carried out to investigate the effect of 808nm diode laser irradiation on dentinal tubules of root canal wall. materials and methods: twelve single-rooted teeth were used. after cleaning and shaping with rotary instruments by the crown down technique, the smear layer was removed by alternating irrigation with edta and sodium hypochlorite. the teeth were then random...

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