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ORIGINAL ARTICLE
Year : 2020  |  Volume : 10  |  Issue : 2  |  Page : 116-120

Influence of passive ultrasonic tip activation at different levels on the depth of sealer penetration: An in vitro study


1 Department of Comprehensive Care Dentistry, Universiti Teknologi MARA, Selangor, Malaysia
2 Centre for Restorative Dentistry, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
3 Department of Chemical and Environmental Engineering, University of Nottingham Malaysia Campus, Selangor, Malaysia
4 Private Practitioner, University of Milan, Italy
5 School of Dentistry, Faculty of Clinical and Biomedical Sciences, University of Central Lancashire, Preston, United Kingdom

Correspondence Address:
Dr. Nurul Ain Ramlan
Faculty of Dentistry, Centre of Study Comprehensive Care, Universiti Teknologi MARA, Sungai Buloh Campus, Jalan Hospital, 47000 Sungai Buloh, Selangor
Malaysia
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/sej.sej_109_19

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Introduction: The aim of this study was to compare the effect between different levels of ultrasonic tip activation on the depth of epoxy resin-based sealer (AH plus) dentinal tubules penetration. Materials and Methods: Extracted single-rooted premolars (n = 60) were randomly allocated into three groups and instrumented following the same protocol. Group 1 (control), the sealer was mixed with 0.1% Rhodamine B dye and placed using size 20 K-file. In Group 2, the sealer was passively activated using ultrasonic tip (ISO 25) 10 s mesiodistally and buccolingually at 2 mm from the apex. In Group 3, the sealer was activated in a similar manner at 4 mm from the apex. Samples were sectioned horizontally at 2 mm, 4 mm, and 6 mm from the apex and analyzed using a stereomicroscope for tubular dentine sealer penetration. The cross-sectional area (μm2) was measured with software to get the percentage of sealer penetration, and presences of voids were recorded. Results: Significant lesser percentage of sealer penetration into the dentinal tubules was observed between the control group and both the experimental groups (P = 0.00) at 2 mm, 4 mm, and 6 mm from the apex. There was no significant difference in the percentage of sealer penetration into the dentinal tubules between both the experimental groups (P > 0.05). The presence of voids between all groups was not statistically significant (P > 0.05). Conclusion: Passive ultrasonic activation of sealer placement resulted in deeper sealer penetration into the dentinal tubules even at a higher level of tip activation (4 mm).


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