Effect of Listerine and Sodium Fluoride Mouthwashes on Force Decay of Orthodontic Memory Elastomeric Chains: An In Vitro Study

Sara  Alijani; Jamshid  Nemati; Mozhde  Borjali; Aysa  Nezakatmaab; Behnaz  Alafchi

doi:10.18502/fid.v23i12.21558

Sara Alijani Department of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
Jamshid Nemati Mechanical Engineering Department, Bu-Ali Sina University Faculty of Engineering, Hamadan, Iran
Mozhde Borjali Department of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
Aysa Nezakatmaab Department of Orthodontics, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
Behnaz Alafchi Department of Biostatistics, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran

DOI: https://doi.org/10.18502/fid.v23i12.21558

Keywords: Mouthwashes; Sodium Fluoride; Tartar Control Listerine; Tensile Strength

Abstract

Objectives: The interaction of mouthwashes with orthodontic elastomeric materials may alter their mechanical properties. The main purpose of this study was to evaluate the impact of 0.05% sodium fluoride Oral-B PRO-Expert Multi Protection and fluoride-free Listerine Advanced with Tartar Protection mouthwashes on the force decay behavior of memory elastomeric chains.

Materials and Methods: In this in vitro study, 90 pieces of closed gray memory elastomeric chains were randomly allocated to three distinct groups (n=30): control, sodium fluoride, and Listerine. The control samples remained fully submerged in artificial saliva over the course of the experiment. Test samples were placed daily for 1 minute in either sodium fluoride or Listerine mouthwash, then in a solution consisting of equal parts of mouthwash and artificial saliva for 30 minutes, followed by a thorough rinse with distilled water, and then placed back in the artificial saliva. Tensile tests were conducted at various time points (baseline, 1 hour, and 1, 7, and 28 days) (n=6). Data were analyzed by one-way and two-way ANOVA, and Tukey’s post-hoc test (alpha=0.05).

Results: All groups exhibited a continuous force decay over time (P<0.001). The experimental groups demonstrated significantly greater force decay compared to the control group (P<0.001). The sodium fluoride group exhibited significantly greater force decay compared to the Listerine group at all measured time points (P<0.001) except on day 28 (P=0.970).

Conclusion: Both mouthwashes accelerated the force degradation of memory elastomeric chains, with sodium fluoride causing a greater reduction except on day 28.