Operative dentistry · 2026
Effect of Argon/Oxygen Low-Temperature Plasma on Degree of Conversion and Bond Strength of Resin Cements to Dentin.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Tsutsumi Msc, Queiroz M E, Delben J A, Cadorin B M, Castro-Hoshino L V, Souza M, Baesso M L, Maluly-Proni A T, Dos Santos P H
Аннотация
PURPOSE: Low-temperature plasma (LTP) has been used as an option for dentin surface treatment prior to adhesion due to its antibacterial effect without causing substantial changes to the dentin surface. However, few studies have reported the influence of argon combined with oxygen on the degree of conversion of resin cements or the adhesive luting procedure. Thus, this study aimed to evaluate the effect of LTP pretreatment of dentin on the degree of conversion of resin cements, as well as the effect on bond strength to dentin of different adhesion luting protocols.
METHODS AND MATERIALS: The dentin surfaces of 72 sound human molars were exposed. Specimens were divided into three groups according to LTP pretreatment (argon-based LTP, argon/oxygen-based LTP, and no LTP application). These groups were then divided into three subgroups (n = 8) and resin composite blocks (Te-Econom Plus, Ivoclar Vivident) were cemented to the dentin according to one of three adhesive luting protocols (Single Bond 2 [Solventum] + RelyX ARC [Solventum], Single Bond Universal [Solventum] + RelyX Ultimate [Solventum], and RelyX U200 [Solventum]). Microtensile bond strengths were measured before and after thermocycling (10,000 cycles between 55°C and 5°C). Degree of conversion was measured using a Raman spectrometer (Senterra, Bruker Optik GmbH). All data were submitted to ANOVA and Tukey post hoc tests (α = 0.05).
RESULTS: RelyX ARC exhibited higher dentin bond strength than RelyX U200 regardless of LTP treatment. RelyX Ultimate showed intermediate bond strength and higher degree of conversion than the other materials. The application of argon-based LTP resulted in bond strength and degree of conversion similar to those of the control group for all cements used. The addition of oxygen to argon to generate LTP resulted in lower bond strength, especially when RelyX U200 was used.
CONCLUSION: The application of Argon plasma did not cause any damage to the adhesive interface. However, neither Argon alone nor the addition of oxygen to argon to generate LTP was beneficial for the properties evaluated.
METHODS AND MATERIALS: The dentin surfaces of 72 sound human molars were exposed. Specimens were divided into three groups according to LTP pretreatment (argon-based LTP, argon/oxygen-based LTP, and no LTP application). These groups were then divided into three subgroups (n = 8) and resin composite blocks (Te-Econom Plus, Ivoclar Vivident) were cemented to the dentin according to one of three adhesive luting protocols (Single Bond 2 [Solventum] + RelyX ARC [Solventum], Single Bond Universal [Solventum] + RelyX Ultimate [Solventum], and RelyX U200 [Solventum]). Microtensile bond strengths were measured before and after thermocycling (10,000 cycles between 55°C and 5°C). Degree of conversion was measured using a Raman spectrometer (Senterra, Bruker Optik GmbH). All data were submitted to ANOVA and Tukey post hoc tests (α = 0.05).
RESULTS: RelyX ARC exhibited higher dentin bond strength than RelyX U200 regardless of LTP treatment. RelyX Ultimate showed intermediate bond strength and higher degree of conversion than the other materials. The application of argon-based LTP resulted in bond strength and degree of conversion similar to those of the control group for all cements used. The addition of oxygen to argon to generate LTP resulted in lower bond strength, especially when RelyX U200 was used.
CONCLUSION: The application of Argon plasma did not cause any damage to the adhesive interface. However, neither Argon alone nor the addition of oxygen to argon to generate LTP was beneficial for the properties evaluated.