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Article
Sealing ability of Biodentine as a root Perforation Treatment Material (An in Vitro Study)

Author: Maha M. Yahya مها م يحيى
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2015 Volume: 3 Issue: 1 Pages: 62-68
Publisher: Tikrit University جامعة تكريت

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Abstract

Perforation of the root canal system is the second large cause of root canal failure. Failure to seal the perforation defect permits rapid break-down of the periodontium and tooth loss. Hence sealing the defect is paramount. Aims: This study was conducted to evaluate the sealing ability of a new material, self-setting dentine substitute (Biodentine) in furcation perforations and compare it with Mineral trioxide aggregate and glass ionomer cement. Materials and Methods: Fifty five (55) recently extracted permanent lower molars with non-fused well developed roots were collected and intentional perforations were made in the furcation area with a bur. The perforations were repaired with Biodentine for group( A) ,mineral trioxide aggregate (MTA) for group (B) and glass ionomer cement(GIC) for group (C). The specimens were then immersed in 2% methylene blue dye for 48 hour. After their removal, they were sectioned and examined under stereo microscope to evaluate dye penetration. Results: demonstrated that furcation perforation repaired with Biodentine showed least microleakage. Conclusion Biodentine demonstrated better results than MTA and GIC.


Article
The Effect Of Root Canal Irrigants On The Push –out Bond Strength Of Biodentine

Author: Maha M. Yahya مها م يحيى
Journal: Tikrit Journal for Dental Sciences مجلة تكريت لعلوم طب الاسنان ISSN: 20731213 Year: 2015 Volume: 3 Issue: 1 Pages: 69-75
Publisher: Tikrit University جامعة تكريت

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Abstract

The aim of This study was to evaluate the effect of some endodontic irrigants on the push-out bond strength Biodentine in comparison with Mineral trioxide aggregate (MTA) and Glass ionomer cement (GIC).Materials and Methods: Mid root dentine of single rooted teeth was horizontally sectioned into 1-mm-thick slices. The canal space of each dentine slice was enlarged with a diamond bur to 1.4 mm in diameter. The samples were divided into 3 groups (n=21)for each, and the following materials were placed, respectively: Biodentine( Septodont, Saint Maur des Foss'es, France),MTA(Dentsply, TulsaDental, Tulsa, OK),and GIC(Medifil, PROMEDICA, Germany).The samples were wrapped in wet gauze for 30 minutes to ensure setting of the materials and then divided into 3 subgroups (n=7)for each, to be immersed into QMix ((Dentsply Tulsa Dental, Tulsa, OK, USA), Bio Pure MTAD (Dentsply Tulsa Dental),and saline solutions for 30 minutes. No irrigant was placed over any test material in the other three subgroups. After incubation for 48 hours, the dislodgement resistance of the samples was measured (with and with exposure to the irrigant solutions) using a universal testing machine. Then the samples were examined under stereomicroscope to determine the nature of the bond failures. Results: The lowest push-out bond strength was observed in the MTA group. Biodentine displayed a significantly higher resistance to displacement than the MTA group. Exposure to QMix, MTAD, and saline solutions did not affect the resistance to displacement of the Biodentine and GIC groups, whereas MTA lost strength after exposure to the irrigant solutions ,but the difference was not significant. Conclusions: The PBS of Biodentine and GIC was not affected by the irrigant solutions. Contact with the irrigant solutions did not have a significant effect on the failure modes of the tested materials

Keywords

Biodentine --- push out --- MTAD --- QMix

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