Effect of ultrasonic agitation on push-out bond strength and adaptation of root-end filling materials

Restorative Dentistry & Endodontics
Murilo Priori AlcaldeMarco Antonio Hungaro Duarte

Abstract

This study evaluated the effect of ultrasonic agitation of mineral trioxide aggregate (MTA), calcium silicate-based cement (CSC), and Sealer 26 (S26) on adaptation at the cement/dentin interface and push-out bond strength. Sixty maxillary canines were divided into 6 groups (n = 10): MTA, S26, and CSC, with or without ultrasonic activation (US). After obturation, the apical portions of the teeth were sectioned, and retrograde cavities were prepared and filled with cement by hand condensation. In the US groups, the cement was activated for 60 seconds: 30 seconds in the mesio-distal direction and 30 seconds in the buccal-lingual direction, using a mini Irrisonic insert coupled with the ultrasound transducer. After the materials set, 1.5-mm thick sections were obtained from the apexes. The presence of gaps and the bond between cement and dentin were analyzed using low-vacuum scanning electron microscopy. Push-out bond strength was measured using a universal testing machine. Ultrasonic agitation increased the interfacial adaptation of the cements. The S26 US group showed a higher adaptation value than MTA (p < 0.05). US improved the push-out bond strength for all the cements (p < 0.05). The US of retrograde filling cements enhanced ...Continue Reading

References

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Citations

Jun 3, 2020·Restorative Dentistry & Endodontics·Fernanda Ferrari Esteves TorresMario Tanomaru-Filho
Aug 14, 2020·Journal of Applied Oral Science : Revista FOB·Lauter Eston PelepenkoMarina Angélica Marciano
Feb 13, 2021·International Journal of Dentistry·Fredson Márcio Acris De CarvalhoFuad Jacob Abi Rached-Junior

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Methods Mentioned

BETA
scanning electron microscopy

Software Mentioned

Image J
AxioVision

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