INTRODUCTION This study compared apical dye penetration using lateral condensation technique (LC) and LC technique with a reciprocal handpiece (mechanical lateral condensation or MLC) as a new method. MATERIALS AND METHODS Forty-eight human extracted straight canine teeth were used. After crown amputation, the teeth were randomly divided into four experimental groups of 10 teeth each and two ...

background and aims. different materials have been used for root-end filling during surgical endodontic treatment. the aim of this in vitro study was to evaluate the dye penetration in different thicknesses of calcium enriched mixture (cem) cement as root-end filling material. materials and methods. following root canal filling in 70 extracted human single-rooted premolar teeth, the apical 3 mm...

We investigated the effects of lasers irradiation on the exposed dentinal tubule. Human tooth specimens with exposed dentinal tubule orifices were used. Three types of lasers (CO(2) laser, Er:YAG laser and Ga-Al-As laser) were employed. The parameters were 1.0 W in continuous-wave mode with an irradiation time of 30 s for the CO(2) laser, 30 mJ in continuous-wave mode with an irradiation time o...

An adequate theory of the penetration 1,~,3 of cresyl blue into the vacuole of living cells of the fresh water plant Nitella may be stated as follows. The dye, in form of free base, which predominates at a high pH value, diffuses in and out of the vacuole very freely, while the dye in form of salt, which predominates at a low pH value, diffuses so slowly that its rate of penetration and that of...

objective: contradictory results have been reported over microleakage studies of restorative materials and methods. despite the number of publications on leakage there are few evidences comparing the different microleakage evaluation methods. the purpose of the present study was to compare the clearing technique and longitudinal sectioning in the evaluation of dye penetration along a glass fibe...

INTRODUCTION This in vitro study aims to evaluate the coronal and apical sealing ability of gutta-percha (GP) root filling used with either mineral trioxide aggregate (MTA), new endodontic cement (NEC) or AH26 as filler/sealers. MATERIALS AND METHODS Forty eight single-rooted extracted teeth were selected, decoronated and then instrumented. Samples were randomly divided into three experimenta...

introduction: microleakage can result in failure of endodontic treatment. an important characteristic of endodontic sealer is sealing ability. the aim of this experimental study was to compare the apical leakage of teeth obturated with gutta-percha and three different sealers (resin- and zinc oxide eugenol-based) with/without smear layer (sl). materials and methods: in this study, 100 single-ro...

INTRODUCTION Success of non-surgical root canal treatment is predicted by meticulous cleaning and shaping of the root canal system, three-dimensional obturation and a well-fitting "leakage-free" coronal restoration. The techniques of obturation that are available have their own relative position in the historical development of filling techniques. Over the years, pitfalls with one technique hav...

A new method is described for vital staining of nervous tissue with methylene blue; it involves impregnation of whole embryos or tissue-fragments with the rongalitreduced dye under anaerobic conditions at pH 5, followed by development of the stain in an oxygenated neutral saline solution. Determinations of the solubility of leucomethylene blue and experiments on vital staining with it and with ...

introduction: various materials and methods have been recommended for successful root canal obturation. the aim of this experimental in vitro study was to compare the sealing ability of three root canal sealers ah-26, glass ionomer cement (gic) and zinc oxide eugenol (zoe) in single gutta-percha obturating system. methods and materials: seventy extracted single-rooted human teeth were decoronat...