@article{Saeed_Horr_Mehdi_2018, title={Evaluation of three novel retrograde filling materials (Microleakage study)}, volume={10}, url={https://mdj.uomustansiriyah.edu.iq/index.php/mdj/article/view/224}, DOI={10.32828/mdj.v10i2.224}, abstractNote={<p>The aim of this study was to compare apical microleakage of MTA following<br>reverse retrograde root filling with that following Alumina Cement, Light Cement,<br>Zenium HMP retrofilling. The root canals of 42 extracted teeth were instrumented and<br>obturated with vertically condensed gutta-percha. Each tooth was apically resected<br>and the apex was prepared by fissure bur to 2 mm depth and the root surface isolated<br>with nail varnish. Teeth were divided randomly into four groups of 10 teeth each.<br>First group was retrofilled with MTA, second group with Alumina Cement, third<br>group with Light Cement, and the fourth group with Zenium HMP. Following<br>immersion in 2% Fuchsine dye for 72 hours, the roots were sectioned and the depth of<br>dye penetration was evaluated by a Global stereomicroscope at x70 magnification.The<br>sealing effectiveness of the retrograde filling materials was determined by their ability<br>to inhibit dye penetration. Results showed that the least leakage for zeniuum HMP<br>cement with a mean of 0.6, MTA with a mean of 1.0, light cement with a mean of<br>1.10, alumina cement with a mean of 1.50 with the most leakage. However, these<br>differences were not seen to be statistically significant using the Kruskal Wallis Test<br>or the Mann Whitney Test. It was concluded that Zenium HMP cement provides a<br>better seal than MTA and Light Cement and Alumina Cement when used as<br>retrograde filling.<br><br></p>}, number={2}, journal={Mustansiria Dental Journal}, author={Saeed, Dr. Musab Hamed and Horr, Dr. Shirin Mohammad and Mehdi, Dr. Jamal A.}, year={2018}, month={Feb.}, pages={156–160} }