LEAKAGE EVALUATION OF IMMATURE TEETH FILLED WITH BIOMATERIALS: MTA, BIODENTINE AND TECHBIOSEALER APEX

Objectives: Objectives of this in-vitro study was to evaluate the sealing ability of ProRoot MTA, Biodentine and TechBiosealer apex.
Methods: Fourty-six maxillary anterior teeth were used in this study. Five teeth were selected as a negative control. Access cavities of the remaining teeth were prepared and the apical parts of the roots were sectioned 9 mm below the cemento-enamel junction. All roots were instrumented with rotary nickel-titanium files. The root canals were irrigated with 2 ml of a freshly prepared solution of 2.5 % NaOCl between each instrument. To simulate the immature teeth Peeso reamers were introduced until no:6 peeso reamer could be passed 1 mm beyond the apex. Smear layer was removed with 5 ml of 17 % EDTA, 5.25 % NaOCl and distilled water. After drying root canals, calcium hydroxide paste was introduced into the root canals and the coronal access cavity was filled with temporary filling material.
After 7 days, calcium hydroxide paste was removed. The root canals were dried with paper-points and the specimens were divided into three experimental groups and positive control group.
Group 1 (Biosealer, 12): Root canals were filled with TechBiosealer apex
Group 2 (Biodentine, 12): Root canals were filled with Biodentine
Group 3 (ProRoot MTA, 12): Root canals were filled with ProRoot
After setting of the root canal fillings coronal access cavites were filled with composite resin. Micro-leakage was measured using the fluid filtration method after 1 week. Measurements were recorded at 2-minute intervals for 8 minutes. The results were calculated as Lp and evaluated statistically using Kruskal-Wallis and Hollander-Wolfe tests (P<0.01).
Results: TechBiosealer apex showed more leakage than ProRoot MTA and Biodentine. There was no significant difference in fluid leakage between ProRoot MTA and Biodentine.
Conclusions: Under the conditions of this in-vitro study ProRoot MTA and Biodentine showed better sealing ability than TechBiosealer apex.