Impact of household vinegar on calculus removal and mechanical properties of orthodontic resin
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ORIGINAL ARTICLE
Impact of household vinegar on calculus removal and mechanical properties of orthodontic resin Binit Shrestha1 · Wassana Wichai2 · Toemsak Srikhirin1 · Surachai Dechkunakorn3 · Niwat Anuwongnukroh3 Received: 22 February 2020 / Accepted: 23 June 2020 © Springer Medizin Verlag GmbH, ein Teil von Springer Nature 2020
Abstract Purpose This study evaluated calculus removal efficacy of household vinegar and its effect on autopolymerizing orthodontic resin following repeated immersion. Methods A total of 72 sectioned specimens of orthodontic retainers with calculus deposits following cleaning with the help of immersion in vinegar of different dilutions between 12.5% and 100%, tap water, effervescent tablets, and mechanical debridement were digitally analyzed. Changes in Ca and Fe ions in vinegar were assessed by atomic emission spectroscopy (AES). For mechanical testing, autopolymerizing polymethyl methacrylate (PMMA) samples were similarly grouped and immersed for 78 cycles and their flexural strength and hardness measured. Fourier-transform infrared spectroscopy (FTIR) was performed to evaluate changes in their chemical composition. One-way analysis of variance (ANOVA) and Tukey’s test were used to analyze the differences in the mean flexural strength and hardness between the groups (p ≤ 0.05). Results A minimum immersion of 2 h in 25% vinegar solution combined with brushing attained efficiency of 74.13 ± 22% calculus removal. Whereas, tap water and effervescent tablets had 15% and 49% efficiency, respectively. AES results showed diffusion of Ca ions from calculus into the vinegar solution as a plausible mechanism for its structural weakening and removal. Results of mechanical testing showed that undiluted vinegar solution affected the flexural strength of PMMA and this effect was significantly different from that of the effervescent tablets and the remaining vinegar concentrations. There was no significant difference in hardness between the groups. The FTIR showed no changes in the chemical composition of PMMA samples following repeated immersions. Conclusion Vinegar can be useful in the removal of calculus from dental appliances but should be used in diluted forms to minimize side effects.
Keywords Polymethyl methacrylate · Tartar · Flexural strength · Hardness · Denture hygiene
Einfluss von Haushaltsessig auf die Entfernung von Zahnstein und die mechanischen Eigenschaften von kieferorthopädischem Kunststoff Zusammenfassung Zielsetzung In dieser Studie wurden die Wirksamkeit von Haushaltsessig zur Entfernung von Zahnstein und seine Effekte auf die Autopolymerisation von kieferorthopädischem Kunststoff nach wiederholtem Eintauchen untersucht.
Niwat Anuwongnukroh
[email protected] 1
School of Materials Science and Innovation, Faculty of Science, Mahidol University, Bangkok, Thailand
2
Dental Biomaterial Analysis and Research Center, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
3
Department of Orthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
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