Influence of Ultrasonic Activation of 4 Root Canal Sealers on the Filling Quality

doi:10.1016/j.joen.2013.11.016

Journal of Endodontics

Volume 40, Issue 7, July 2014, Pages 964-968

https://doi.org/10.1016/j.joen.2013.11.016 Get rights and content

Abstract

Introduction

The purpose of this study was to evaluate the effects of ultrasonic activation on the filling quality (intratubular sealer penetration, interfacial adaptation, and presence of voids) of 4 epoxy resin–based sealers.

Methods

Eighty-four extracted human canines were divided into 4 groups (n = 20) according to the sealer used to obturate the root canals instrumented with F5 ProTaper instruments (50/05) (Dentsply Maillefer, Ballaigues, Switzerland). The canals were filled by the lateral compaction technique. Previously, the sealers were labeled with rhodamine B dye to allow analysis under a confocal microscope. At the time of obturation, the specimens were divided again into 2 groups (n = 10) according to the ultrasonic activation of the sealers: ultrasonically activated and nonultrasonically activated groups. All samples were sectioned at 2, 4, and 6 mm from the apex. The percentages of voids, gaps, and dentinal sealer penetration segments of the canal were analyzed.

Results

Regarding the sealer penetration segments, there was a significant increase for the AH Plus (Dentsply Maillefer), Acroseal (Specialités Septodont, Saint Maur-des-Fossés, France), and Sealer 26 (Dentsply Maillefer) at the 4-mm level and the AH Plus and Sealer 26 at the 6-mm level with ultrasonic activation (P < .05). Concerning the gaps, the ultrasonic activation promoted a smaller presence for all sealers at the 4- and 6-mm levels (P < .05). No statistical significant differences were found for the percentages of voids (P < .05).

Conclusions

The use of ultrasonic activation of an epoxy resin–based sealer promoted greater dentinal sealer penetration and less presence of gaps.

Section snippets

Materials and Methods

Eighty-four maxillary human canines with a root curvature less than 5° were used (19). The ethics committee approved the use of extracted teeth for the research (CEP 079/2011). The crowns were removed at the cementoenamel junction using a 0.3-mm low-speed diamond saw (Isomet, Buehler, Lake Bluff, IL), and the root canal length was established at 15 mm. The working length was established by measuring the penetration of a size 10 K-file (Dentsply Maillefer) until it reached the apical foramen and

Results

Median and range of voids, interfacial adaptation (gaps), and dentinal sealer penetration segments of the canal can be found in Table 1. With regard to the sealer penetration segments, there was a significant increase for the AH Plus (Fig. 2E and F), Acroseal, and Sealer 26 at the 4-mm level, and the AH Plus and Sealer 26 at the 6-mm level when the ultrasonic activation was performed (P < .05). Regarding the gaps, the ultrasonic activation promoted a smaller presence for the AH Plus at the 2-mm

Discussion

The null hypothesis tested was confirmed because the ultrasonic activation improved the filling quality of the 4 epoxy resin–based sealers. The transmission of acoustic microstreaming energy from an oscillating file by the use of ultrasonic activation can promote the penetration of irrigants in an area of anatomic complexity and the dentinal tubules, resulting in a greater cleaning ability (16). With regard to the intracanal medication, Duarte et al (23) analyzed the influence of ultrasonic

Conclusions

The use of ultrasonic activation of an epoxy resin–based sealer promoted greater dentinal sealer penetration and less presence of gaps.

Acknowledgments

Supported by the State of São Paulo Research Foundation FAPESP (2011/03973-4).

The authors deny any conflicts of interest related to this study.

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Basic ResearchInfluence of Ultrasonic Activation of 4 Root Canal Sealers on the Filling Quality

Abstract

Introduction

Methods

Results

Conclusions

Section snippets

Materials and Methods

Results

Discussion

Conclusions

Acknowledgments

Oral Surg Oral Med Oral Pathol Oral Radiol Endod

J Endod

J Endod

J Endod

J Endod

J Endod

J Endod

J Endod

J Endod

Oral Surg Oral Med Oral Pathol

J Dent

J Endod

J Endod

J Endod

J Endod

J Endod

J Endod

J Endod

Basic Research
Influence of Ultrasonic Activation of 4 Root Canal Sealers on the Filling Quality