In vitro Mechanical Behavior of Elastic Distal Chain and Ligature Immersed in Antiseptics
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Abstract
Introduction. Elastomeric chains and tiebacks are used in orthodontics during the space closure phase. Hence, it is necessary to use the most efficient material for this purpose. Objective. This research aimed to evaluate the loss of strength in elastomeric chains (3M Unitek) and tiebacks (3M Unitek) on days 0, 7, 14, and 21, as well as the effects of 0.12% chlorhexidine and triclosan on their mechanical behavior. Materials and methods. The sample consisted of 90 elastomeric chains and 90 tiebacks. These chains were brought under stress tests at a constant distance. Results. The differences in strength between the chain measurements and tieback exposed to the three solutions were not statistically significant (p> 0.05). Significant changes were identified among the different time intervals. The elastomeric chain presented a higher mean value of strength loss in the first 7 days and remained constant until 21 days, with biological forces. The tieback showed loss of strength up to 14 days, from that moment on, the strength is no longer functional for tooth movement. Conclusion. Time is the most important factor in elastomer strength loss. The force maintained in the elastomeric chain is more constant and biological in comparison with the tieback.
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