Background and objectives: .The purpose of this study was to evaluate the effect of smear layer removal on apical seal and the quantity of microleakage associated with lateral cold condensation and thermafil obturation. Methods: Forty extracted single–rooted human teeth were randomly divided into two experimental groups; in group A, 20 roots with smear layer free, 5.25 % sodium hypochlorite (Na...

Lateral orientated growth of In2O3 nanowire (NW) and nanorod (NR) arrays has been achieved by a vapor transport and condensation method on (001) and (111) surfaces of Si substrates. The single crystalline In2O3 NWs and NRs were grown along [211] in parallel to the Si +/-[110] and lying in the substrate plane. The electrical measurements show that the In2O3 NWs are p-type semiconductor. By N+ do...

We describe the successful use of a combination of nonsurgical root canal treatment and ultrasonic irrigation for collaborative management of a maxillary left lateral incisor with perforation of the apical third of the root. During the endodontic treatment procedure, the ultrasonically activated tip was used for intracanal irrigation. The area of perforation in the apical third of the root and ...

taurodontism is a morphologic feature of generally multi-rooted teeth with large pulp chambers and shortened roots. a case of endodontic treatment in a 24-year-old male with the chief complaint of swelling and pain in the right mandibular region is described. periapical lesion was present in the radiographic examination of hypertaurodont second mandibular molar. four root canals were detected w...

there is lack of consensus among endodontic specialists about the necessity of tug back. in this regard, we designed a study in which 44 single rooted teeth with closed apex were selected and filed up to file #50. the teeth were obturated with lateral condensation method while in half of them there was not any tug back and in the other half tug back was achieved. apical leakage was assessed by ...

The aims of this study were to evaluate the effect of root canal filling techniques on root fracture resistance and to analyze, by finite element analysis (FEA), the expansion of the endodontic sealer in two different root canal techniques. Thirty single-rooted human teeth were instrumented with rotary files to a standardized working length of 14 mm. The specimens were embedded in acrylic resin...

Sequential thymidine radiograms from rats injected on day El5 and killed thereafter at daily intervals up to day E22 were analyzed t o trace the migratory routes and settling patterns of neurons of the lateral reticular nucleus and the external cuneate nucleus. The neurons of the lateral reticular and external cuneate nuclei originate in the primary precerebellar neuroepithelium at the same sit...