Anna Marina Teixeira Rodrigues Neri; Anna Carollina Pereira Barroso; João Victor Fernandino Sales Diniz Campos; Larissa Doalla de Almeida e Silva; Ângelo Fonseca Silva; Carolina Carvalho de Oliveira Santos; Thiago Fonseca-Silva
Summary
The aim of this study was to analyze the mechanical behavior of orthodontic archwires when exposed daily to beverages. During clinical practice, orthodontists constantly observe the biodegradation of orthodontic appliances. The components of orthodontic wires, as they are permanently in contact with the oral cavity, can undergo biochemical changes caused by saliva, beverages, and foods. A sample of 550 orthodontic CrNi steel archwires that were divided into 5 groups according to their caliber, experimental exposure and follow-up time. Each group had a sample of 10 arches (n = 10). The arches were packed in Petri dishes, immersed in artificial saliva and stored in an oven at 37ºC. After 24 hours, they were subjected to daily exposures of 20 minutes in 5 different solutions (artificial saliva, milk, Coca-Cola, lemon juice and coffee). Mechanical tests were performed at three different times: on the first day of the experiment (T0); on the fifteenth day of the experiment (T15); and on the thirtieth day of the experiment (T30). The comparison between the groups for the results of the force and tension tests was adjusted in a Unidirectional Analysis of Variance model and subsequently submitted to the PostHoc test for multiple comparisons, adopting a significance level of 95 % (p<0.05). Archwires without exposure to food solutions showed higher mean values of force and tension when compared to archwires exposed to the solutions in both T15 and T30 groups. It was observed that orthodontic CrNi archwires, in contact with different solutions, decrease their strength and tension. The orthodontic CrNi steel archwires daily to different beverages showed decrease in the mechanical properties of force and tension of these materials.
KEY WORDS: beverages, orthodontic wires, orthodontics.
How to cite this article
NERI, A. M. T. R.; BARROSO, A. C. P.; CAMPOS, J. V. F. S. D.; E SILVA, L. D. A.; SILVA, A. F.; SANTOS, C. C. O. & FONSECA-SILVA, T. Effect of some beverages on the mechanical properties of force and tension of orthodontic archwires - in vitro study. Int. J. Odontostomat., 18(4):393-401, 2024.