Article Type

Original Article




Objective: To assess the area of sealer penetration into dentinal tubules in different sections ofthe root canal using a confocal laser scanning microscope after irrigation with NaOCl and followed by ultrasonicactivation. Materials and Methods: Mandibular premolars were selected according to the inclusion criteria which are:single straight root canal or slightly curved, fully developed apex with patent foramina, no obstruction in the canalsystem or indication of internal and/or external resorption or signs of crack or fracture, then the teeth were prepared,irrigated using NaOCl, activated, and then filled with Meta Biomed CeraSeal Bioceramic sealer using a single coneobturation technique. Rhodamine B was added to the sealer. Specimens were sectioned and divided into coronalsections, middle sections, and apical sections. The percentage of the sealer's penetration area was determined for eachroot level using a 10x confocal laser microscope. Results: The results were displayed as mean ±SD. A statisticallysignificant difference was found between the studied sections (P < 0.001). Coronal sections presented the largest sealerpenetration (35.19%), while apical sections showed the lowest sealer penetration. Conclusions: Penetration is affectedby root dentine level as bioceramic sealer shows inferior penetration at smaller distances from the apex.