OBJECTIVES An important factor that interferes with the bonding between the root canal wall and resin cement is the root canal sealer remnant. There is controversy about the effect of eugenol-containing sealers on the bond strength between resin cements and fiber post. The aim of this study was to evaluate the effect of the type of endodontic sealer on the bond strength of FRC posts cemented wi...

background: during endodontic procedures, the smear layer is formed as a result of mechanical instrumentation of the canal. combination of ethylenediamine tetraacetic acid (edta) and sodium hypochlorite (naocl) is widely used for removal of the smear layer. application of mixture of tetracycline, acid, and detergent (mtad) as final irrigant subsequent to initial irrigation of 1.35% naocl has be...

INTRODUCTION The aim of this in vitro study was to compare the efficacy of two retreatment rotary systems in removal of gutta-percha (GP) and sealer from the root canal walls with and without use of solvent. MATERIALS AND METHODS Sixty single-canalled distal roots of mandibular molars were prepared and root filled with gutta-percha and AH26. Each canal was randomly allocated to receive one of...

The study used 16x106 heteroploid L929 mouse fibroblasts in 40 ml Eagles’ MEM (minimum essential medium) which contained 10% fetal bovine serum (FBS; HyClone, Logan, Utah), 10.000 units of penicillin-G/ml, 10 mg of Streptomycin/ml, and 200mM of L-glutamine (Sigma Chemical Co., St Louis). Cells were maintained at 37°C under 5% CO2, 100% humidity, and were labeled with 300 μCi 51Cr in the form of...

Introduction: Growth and proliferation of the remaining microorganisms within the root canals may destroy the surrounding tissue of the root and leads to periapical lesion. Consequently, the complete elimination of microorganisms from the root canal is a n important goal of endodontic therapy. Endodontic sealers do not provide complete seal in root canal system, and micro spaces have always rem...

background & aim: antibacterial effect of the sealers which are used in root canal therapy is a factor which increases the rate of success in root canal therapy. the aim of this study was to compare the antibacterial effect of three sealers (zoe, ah26, dorifill) on two bacterial species, staphylococcus aureuse and streptococcus mutans immediately after mixing and one week after mixing. methods ...