Evaluating Bonding Agent's Effect in Microleakage of a Bioactive Restorative Material with Thermocycling and PH Challenge Test

Susan Xu ； Jung-Wei Chen ； Clyde Roggenkamp ； Wu Zhang

《臺灣兒童牙醫學雜誌》 19卷4期 (2019/12) Pp. 133-142

https://doi.org/10.6319/TJPD.201912_19(4).0001

摘要

Purpose: To evaluate microleakage of a bioactive restorative material with and without bonding agent, and a conventional nanocomposite. Method: Forty-eight Class V preparations were prepared on the buccal and lingual aspects of 24 human third molar teeth. Preps were restored with Activa with a bonding agent, Activa with no bonding agent, and Filtek Supreme Ultra with a bonding agent. Thirty-six specimens were thermocycled, while the remaining 12 non-thermocycled specimens served as controls. All groups underwent a 21 day cycle of acidic pH challenges followed by immersion in a saliva substitute. Specimens were immersed in methylene blue, sectioned, and evaluated under light microscopy. Microleakage was quantitatively assessed by measuring methylene blue penetration at the tooth-restoration interface. Results: Mean microleakage: Bonded Activa 0.40±0.12 mm, non-bonded Activa 0.04±0.02 mm, bonded Filtek Supreme Ultra 0.44±0.12 mm, and bonded Activa (non-thermocycled control) 0.49±0.07 mm. One-way ANOVA and Fisher LSD Post Hoc testing demonstrated significantly less microleakage for Activa restorations without bonding agent (P＜0.001). Conclusions: Activa without a bonding agent had less microleakage when compared to Activa and Filtek Supreme with bonding agents (P＜0.001).

關鍵字

Bioactive material ； bonding agent ； microleakage ； thermocycling ； PH challenge