Abstract
Objectives
The objective of this work was to evaluate the impact of fixed orthodontic appliances on oxidative stress (OS) and genotoxicity from oral epithelial cells.
Materials and methods
Samples of oral epithelial cells were obtained from fifty-one healthy voluntary subjects who had an indication for orthodontic treatment. The samples were obtained before treatment and after 6 and 9 months of treatment. OS was evaluated by quantitating 8-hydroxy-2’deoxyguanosine (8-OHdG) and by performing relative gene expression with antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT). DNA degradation and instability were evaluated by multiplex polymerase chain reaction (PCR) and fragment analysis for human identification.
Results
The quantitation results showed that 8-OHdG increased during treatment, although this increase was not statistically significant. SOD increased by 2.5- and 2.6-fold after 6 and 9 months of treatment, respectively. CAT increased by threefold after 6 months of treatment, while after 9 months of treatment, the expression level decreased to a level similar to that before treatment. DNA degradation was found in 8% and 12% of DNA samples after 6 and 9 months of treatment, respectively, while DNA instability was detected in only 2% and 8% of DNA samples after 6 and 9 months of treatment, respectively.
Conclusions
The results showed that OS and genotoxicity slightly changed after treatment with a fixed orthodontic appliance; in addition, a biological adaptation response to the treatment may occur after 6 months.
Clinical relevance
OS and genotoxicity in the buccal cavity are risk factors for oral and systemic diseases. This risk may be reduced through antioxidant supplementation, by using thermoplastic materials, or by reducing the orthodontic treatment time.
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Availability of data and materials
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Funding
This work was supported by the Instituto Politécnico Nacional reseach was funded by SIP project: 20220310.
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LAE performed the research and analyzed and interpreted the data; EPS performed ELISAs and analyzed and interpreted the data; NMPV analyzed and interpreted the data; MGP analyzed and interpreted the data; and VSM designed the project, analyzed and interpreted the data, and wrote the manuscript. All authors read and approved the manuscript.
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The Institutional Ethical Committee of the “Clínica de Especialidades Odontológicas” of the National Defense Ministry approved the protocol, informed consent, and diffusion of results (approval number 19CI09016025).
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Angeles-Estrada, L., Pérez-Soto, E., Pérez-Vielma, N.M. et al. Oxidative stress and genotoxicity in oral epithelial cells from subjects undergoing orthodontic treatment with fixed appliances. Clin Oral Invest 27, 4225–4231 (2023). https://doi.org/10.1007/s00784-023-05039-6
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DOI: https://doi.org/10.1007/s00784-023-05039-6