The effects of 45S5 bioactive glass and Er:YAG Laser on the microtensile bond strength of fluorosed teeth. Issue 12 (31st July 2020)

• Record Type: Journal Article
• Authors: Huang, Xiaoyu; Xie, Jing; Lan, Yuyan; Sun, Zhengfan; Zhang, Meifeng; Guo, Ling
• Is Part Of: Microscopy research and technique. Volume 83:Issue 12(2020)
• Page Start: 1558
• Page End: 1565
• Publication Date: 2020-07-31
• Subjects: dentine bonding -- dentine hypersensitivity -- desensitizing -- fluorosis; Electron microscopy -- Technique -- Periodicals; Microscopy -- Periodicals; Microscopy -- Technique -- Periodicals; 502.825
• DOI: 10.1002/jemt.23550
• Languages: English
• ISSNs: 1059-910X

Abstract

Abstract: This vitro study aimed to evaluate the effects of 45S5 bioactive glass (BAG) and Er:YAG laser as desensitization treatments on the microtensile bond strength (MTBS) of fluorosed teeth. The 120 noncarious fluorosis were to obtain superficial dentin, being classified into four groups according to the Thylstrup and Fejerskov Index (TFI). Specimens from each group were randomly divided into five subgroups. After fluorosed teeth hypersensitivity models were established, the following pretreatments were applied on dentine surface: Subgroup 1: deionized water (Control); Subgroup 2: BAG; Subgroup 3: Er:YAG laser; Subgroup 4: BAG + Er:YAG laser, and Subgroup 5: Er:YAG laser + BAG. One sample was randomly selected from each subgroup for scanning electron microscope (SEM). The remaining samples were bonded with composite resin by Adper Single Bond 2 adhesive. Then water bath at 37°C for 24 hr. After 5, 000 thermocycling, MTBS was tested and fracture mode was analyzed. The difference of MTBS between BAG group and Control group was found statistically significant ( p < .05) in fluorosis. The Er:YAG laser + BAG group showed lowest MTBS values in fluorosis. In conclusion, the pretreatment of BAG might be beneficial to the adhesive of fluorosed teeth. Er:YAG laser desensitization alone or using BAG first and then Er:YAG laser desensitization might not affect the adhesive of fluorosed teeth, while Er:YAG laser desensitization followed by the pretreatment of BAG would be not conducive to the adhesive of fluorosed teeth. Abstract : This study found that the pretreatment of 45S5 bioactive glass might be beneficial to the bonding of fluorosed teeth. Er:YAG laser desensitization alone or using 45S5 bioactive glass first and then Er:YAG laser irradiation might not affect the bonding of fluorosed teeth. Er:YAG laser irradiation followed by the pretreatment of 45S5 bioactive glass would be not conducive to the bonding of fluorosed teeth. This study might provide guiding significance of improving the dentin bonding of fluorosed teeth and the treatment of dental fluorosis sensitivity.