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Background: This study aimed to analyze six commercial brands of latex elastics regarding force degradation based on the time factor, in time intervals of 12, 24, 48, and 72 hours., Methods: The elastics were stretched by three times their diameter, measured, immersed in artificial saliva at 37° C, and stored in a glass container. Data obtained were described by mean parameters, standard deviation, degradation rate, and coefficient of variation and Tukey's post-hoc Test (P<0.05)., Results: American Orthodontics™ was the brand closest to prescription (94.70%), and Uniden™ was the one with the lowest performance (73.60%). By analyzing the total force degradation rate at the end of the experiment, it is noted that elastics from the Orthometric™ brand presented the highest rate (20.24%)., Conclusions: It is concluded that the latex elastics studied suffer great intensity variation of initial force, and the higher variation rate occurs in the first 12 hours.

Background: this study aimed to analyze, six commercial brands of latex elastics regarding force degradation according to time, immediately and in time intervals of 12, 24, 48, and 72 hours., Methods: the elastics were stretched by three times their diameter, measured, immersed in artificial saliva at 37 °C, and stored in a glass container. Data obtained were described by mean parameters, standard deviation, degradation rate, and coefficient of variation and Tukey's post hoc test (p<0.05)., Results: American OrthodonticsTM was the brand closest to prescription (94.70%), and UnidenTM was the one with the lowest performance (73.60%). By analyzing the total force degradation rate at the end of the experiment, it is noted that elastics from the OrthometricTM brand presented the highest rate (20.24%)., Conclusions: it is concluded that the latex elastics studied suffer great intensity variation of initial force, and the higher variation rate occurs in the first 12 hours.