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To evaluate the effects of different concentrations of chlorhexidine on the decline in force of orthodontic elastics. In a laboratory study, five groups of samples were tested, with one control group represented by distilled water (group 1) and four experimental groups: 0.12% manipulated chlorhexidine (group 2), 0.2% manipulated chlorhexidine (group 3), 0.12% chlorhexidine gluconate-based oral solution (0.12% Periogard; group 4), and 0.2% Cleanform mouthwash (formula and action; group 5). The test groups were submersed in artificial saliva at 37°C. Templates were used and submerged in the chlorhexidine solutions for 30 seconds twice a day. Force was measured with a digital dynamometer at six different time intervals: 0, 1, 7, 14, 21, and 28 days. No statistical differences were found among the groups in the initial period, at 24 hours, and at 7 days (P > .05). There were statistical differences between groups 2 and 5 at 14 days of the experiment and between group 1 and the others at 28 days. In the initial period, the force was statistically higher than it was at any of the other periods of the experiment (P < .05). In the present study, chlorhexidine showed no significant influence on the force degradation of the chain elastics tested.


Matheus Melo Pithon, Dandara Andrade Santana, Kássio Henrique Sousa, Isa Mara Andrade Oliveira Farias. Does chlorhexidine in different formulations interfere with the force of orthodontic elastics? The Angle orthodontist. 2013 Mar;83(2):313-8

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PMID: 22928936

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