Effects of chlorhexidine on bonding durability of different adhesive systems using a novel thermocycling method. (5th May 2013)

• Record Type: Journal Article
• Authors: Deng, D; Huang, X; Huang, C; Yang, T; Du, X; Wang, Y; Ouyang, X; Pei, D
• Is Part Of: Australian dental journal. Volume 58:Number 2(2013:Jun.)
• Page Start: 148
• Page End: 155
• Publication Date: 2013-05-05
• Subjects: Dentistry -- Periodicals; Dentistry -- Periodicals; Dentisterie -- Australie -- Périodiques; Tandheelkunde; 617.6
• DOI: 10.1111/adj.12038
• Languages: English
• ISSNs: 0045-0421

Abstract

<abstract abstract-type="main" xml:lang="en" id="adj12038-abs-0001"> <title>Abstract</title> <sec id="adj12038-sec-0001" sec-type="section"> <title>Background</title> <p>The purpose of this study was to evaluate the influence of chlorhexidine on the bonding durability of etch‐and‐rinse and self‐etch adhesive systems using the polymerase chain reaction (PCR) thermocycling method.</p> </sec> <sec id="adj12038-sec-0002" sec-type="section"> <title>Methods</title> <p>Twenty freshly extracted intact human third molars were ground and bonded with either an etch‐and‐rinse adhesive (Single‐Bond) or a self‐etch adhesive (G‐Bond). Specimens were either left untouched or placed in PCR tubes filled with three thermocycling mediums: water, chlorhexidine or silicone oil. Thermocycling (5000 cycles) was done using the PCR programme at temperatures of 5 °C and 55 °C. The microtensile bond strength (μTBS) was evaluated and interfacial nanoleakage was assessed by scanning electron microscopy before and after thermocycling.</p> </sec> <sec id="adj12038-sec-0003" sec-type="section"> <title>Results</title> <p>Significant differences were detected among groups kept in different media after thermocycling. For Single‐Bond, both the chlorhexidine and silicone oil groups could preserve the μTBS (p < 0.001). For G‐Bond, μTBS of the chlorhexidine and water groups were significantly decreased (p < 0.05). No obvious increase in silver deposition was observed in specimens incubated in water after thermocycling, less silver penetration was found in specimens incubated in chlorhexidine.</p> </sec> <sec id="adj12038-sec-0004" sec-type="section"> <title>Conclusions</title> <p>In this experimental model, chlorhexidine was found to preserve bonding durability in Single‐Bond but have no significant effects on G‐Bond.</p> </sec> </abstract>