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Evaluation of the Effects of a Nonthermal Atmospheric Pressure Plasma Jet on the Prevention of Enamel Demineralization During Fixed Bracket Treatment Publisher



Mousavi SFP1 ; Ganjovi A2 ; Eskandarizadeh A1 ; Edini HZ3 ; Shaykhian S3 ; Poor MHS4 ; Saidi AR5 ; Falahat A6 ; Derakhshan S7
Authors
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Authors Affiliations
  1. 1. Oral and Dental Diseases Research Center, Kerman University of Medical Science, Kerman, Iran
  2. 2. Laser Research Group, Photonics Research Institute, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
  3. 3. Department of Orthodontics, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran
  4. 4. Bam University of Medical Sciences, Bam, Iran
  5. 5. Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
  6. 6. University of Applied Science and Technology, Centre of Mahan Air, Kerman, Iran
  7. 7. Oral and Maxillofacial Pathology Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran

Source: Plasma Medicine Published:2022


Abstract

The effects of a nonthermal atmospheric plasma jet (NAPJ) on the enamel demineralization rate around orthodontic brackets were investigated. Fifty extracted caries-free human premolars were divided randomly into five groups and fixed with round wires. For each group, 100 cm3 BHI medium containing 2% glucose with 1.5 × 108 cells of Streptococcus mutans was used. Moreover, 10 cm3 of this solution was replaced with 10 cm3 of a fresh solution with glucose and S. mutans for 21 days. Group 1 held negative controls. Group 2 teeth were brushed in a tooth-brushing machine with fluoride-free toothpaste and a soft brush. Groups 3, 4, and 5 were exposed twice a week with NAPJ for 1, 2, and 3 minutes, respectively, and were brushed. Lastly, all teeth were sectioned buccolingually, and demin-eralization depth was measured by stereomicroscope. The mean demineralization depth in groups 3, 4, and 5 was less than that in group 2 (P < 0.05) and group 1 (P < 0.001). There were no significant differences among groups 3, 4, and 5 with different plasma exposure du-rations. While the demineralization depth average in groups 3, 4, and 5 was about 80% that of group 2, it was mostly about 60% that of group 1. Therefore, it was concluded that the NAPJ is a suitable tool for the reduction of cariogenic bacterial species at 1-min exposure. More-over, demineralization was not completely observed in 20 positions on the enamels in all groups. © 2022 by Begell House, Inc.