M. Tabrizizadeh , Z. Mohammadi , Mj. Barzegar Bafruyi ,
Volume 20, Issue 4 (5 2008)
Abstract
Background and Aim: Sealing the root canal system is of great importance in endodontic treatment especially in infected teeth. Several materials have been introduced for this purpose. The aim of the present study was to evaluate the sealing ability of MTA as an orthograde root filling material and compare it with laterally condensed gutta-percha with sealer.
Materials and Methods: Thirty-six extracted human maxillary central and canine teeth were used in this experimental study. After preparation and surface disinfection with 1% NaOCl solution, the crowns of the teeth were cut at cemento-enamel junction.Roots were randomly divided into four groups: two experimental groups of 15 roots each (gutta-percha with AH26 sealer and MTA) and two control groups of 3 roots each (positive and negative). After root canal preparation and filling, the sealing ability of each technique was assessed by immersion in 1% methylene blue dye for 72 hours. Then the teeth were cleared and the extent of dye penetration was measured with a stereomicroscope. Data were analyzed by T-test with P<0.05 as the level of significance.
Results: The results showed that the mean microleakage was 1.1mm (SD=2.1) in the gutta percha group and 3.4mm (SD= 2.1) in the MTA group.This difference was statistically significant (P=0.013).
Conclusion: Based on the results of this study, canal obturation with gutta-percha and AH26 sealer may provide a better apical seal compared with MTA. However, further studies on microbial leakage are needed for more precise evaluation of the sealing ability of MTA.
Fatemeh Owlia, Mohsen Barzegar, Farinaz Sabaghzadegan, Shima Mosallaei Pour, Zahra Gorji, Kimia Mashayekh,
Volume 39, Issue 0 (3-2026)
Abstract
Ameloblastoma is one of the most common benign tumors originating from odontogenic tissues. Despite being benign, it has a locally aggressive behavior and a high tendency to relapse. While, this tumor is mainly found in the posterior region of the mandible, its occurrence in the maxilla is rare and is associated with more diagnostic and therapeutic challenges. This report presents a rare case of ameloblastoma in the maxilla of a 64-year-old male patient who presented with painless swelling and significant extension of the lesion to the midpalate. Clinical, radiological, and histopathological findings were reviewed and after necessary evaluations, the diagnosis of ameloblastoma was confirmed. The anatomical complexity of the maxilla, proximity to vital structures, and surgical limitations make the management of these tumors more difficult. The present report emphasizes the importance of early diagnosis, careful histological examination, and the need for a multidisciplinary therapeutic approach in dealing with this type of tumor.
