Effect of Helium/Oxygen Plasma on the Shear Bond Strength of Self-adhesive Resin Cement on Coronal Dentin

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Published: Apr 20, 2021
Keywords:
Cold plasma Self-adhesive resin cement Shear bond strength

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Pranisa Emyoo
Dental Department, Paholpolpayuhasena Hospital, Kanchanaburi, Thailand
Pavisuth Kanjantra
Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
Dheerawan Boonyawan
Plasma and Beam Physics Research Facility, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand
Thanapat Sastraruji
Dental Research Center, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand

Abstract

ABSTRACT:


Objectives: This study investigated the effects of helium/oxygen plasma on shear bond strength (SBS) when RelyX™ U200 self-adhesive resin cement was applied to coronal dentin, both when the dentin surface was re-wetted and when it was not re-wetted.


Materials and Methods: RelyX™ U200 self-adhesive resin cement was applied to coronal dentin, using the following five methods: dentin surface with no plasma treatment (control group); helium plasma jet (He); helium/oxygen plasma jet (He/O2); helium jet with re-wetting (He+R); and helium/oxygen jet with re-wetting (He/O2+R). The shear bond strength (SBS) was measured 24 hours after bonding. Water contact angles and SEM evaluations of each group, both after surface treatment and of cement/dentin interfaces, were investigated. One-way ANOVA and Sheffe Post Hoc test statistics were used.


Results: Mean SBS values in both groups treated with plasma followed by re-wetting (He+R: 16.25±2.39 and He/O2+R: 18.15±1.93 MPa) were higher than in the plasma-only (He: 13.26±1.52 and He/O2: 12.98±1.94 MPa) and control groups (11.20±1.87 MPa) (p<0.05). The results for the two plasma systems were not significantly different from each other, with or without re-wetting (p>0.05). Water contact angle measurements in all plasma-treated groups showed significantly lower contact angle values. SEM evaluations showed that plasma treatments followed by re-wetting could partially remove the smear layer and open the dentinal tubules, resulting in resin tag formation at the interfaces.


Conclusion: The use of helium/oxygen plasma jet followed by re-wetting enhances the bonding effectiveness of RelyX™ U200 self-adhesive resin cement to coronal dentin.


Keywords: Cold plasma; Self-adhesive resin cement; Shear bond strength

Article Details

How to Cite
Emyoo, P., Kanjantra, P., Boonyawan, D., & Sastraruji, T. (2021). Effect of Helium/Oxygen Plasma on the Shear Bond Strength of Self-adhesive Resin Cement on Coronal Dentin. Chiang Mai Dental Journal, 42(1), 101–109. Retrieved from https://he01.tci-thaijo.org/index.php/cmdj/article/view/243585
Issue
Vol. 42 No. 1 (2021): January-April
Section
Original article

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