Effect of 45S5 bioactive glass on the microshear bond strength of dental fluorosis. Issue 5 (13th December 2021)

• Record Type: Journal Article
• Authors: Huang, Xiaoyu; Xie, Jing; Zhang, Meifeng; Sun, Zhengfan; Xu, Yao; Yang, Wanrong; Guo, Ling
• Is Part Of: Microscopy research and technique. Volume 85:Issue 5(2022)
• Page Start: 1663
• Page End: 1670
• Publication Date: 2021-12-13
• Subjects: bioactive glass -- dentin hypersensitivity -- desensitizing -- fluorosis -- microshear bond strength; Electron microscopy -- Technique -- Periodicals; Microscopy -- Periodicals; Microscopy -- Technique -- Periodicals; 502.825
• DOI: 10.1002/jemt.24026
• Languages: English
• ISSNs: 1059-910X

Abstract

Abstract: The aim of this in vitro study was to estimate the effect of the species concentration of 45S5 bioactive glass (BAG) used as pretreatment on the microshear bond strength (MSBS) of dental fluorosis (DF). Based on the Thylstrup and Fejerskov index, 80 teeth were randomly divided equally into four groups: TFI 0, sound dentin; TFI 1–3, mild fluorosis; TFI 4–5, moderate fluorosis; and TFI 6–9, severe fluorosis. Each group was randomized into five subgroups. After preparing the dentin hypersensitivity model of DF, the dentin was pretreated as follows, Subgroup 1: deionized water (Control group); Subgroup 2: 1% BAG; Subgroup 3: 5% BAG; Subgroup 4: 10% BAG, and Subgroup 5: 20% BAG. Stochastically one specimen was selected from each subgroup for scanning electron microscope and energy dispersive spectrometer analysis. After being made of resin–tooth bonding samples, the remains were in water bath at 37 °C for 24 hr. Subsequently, samples from each subgroup were randomly selected to test MSBS without aging, or after a thermocycle of 5, 000 and 10, 000 times, respectively. The fracture modes were analyzed. Compared with the group of 1% BAG and Control, the exposure area of tubules in 5%, 10%, and 20% BAG group had significant difference ( p < .05). MSBS results indicated that there were significant differences between 10% BAG with other groups. The 20% BAG group showed the lowest MSBS among all groups. Pretreatment of 10% BAG solution may be conductive to enhance the bond strength of DF, while 20% BAG solution adversely. Abstract : This study found that 5%, 10%, and 20% of BAG solution have a better dentin sealing effect on fluorosed teeth. Pretreatment of 10% BAG solution might be conductive to enhance the bond strength of dental fluorosis, while 20% BAG solution adversely. This study might provide guiding significance of improving the dentin bonding of fluorosed teeth as well as the dentin hypersensitivity treatment of fluorosed teeth.