effects of carbonated soft drink consumption on orthodontic tooth movements in rats.

the aim of this animal study was to evaluate the possible effects of carbonated soft drink consumption on the rate of orthodontic tooth movement in rats.thirty-six adult male sprague-dawley rats were randomly divided into two experimental groups and one control group. in the experimental groups (a&b;), the water in the dietary regimen was replaced with soft drinks (fanta® in group a and cola® in group b) two weeks before placement of orthodontic appliances. then 5-mm nickel-titanium closed-coil springs were placed between the maxillary right first molars and first incisors under general anesthesia. this regimen continued for two weeks more and animals drank soft drink ad libitum. at the end of the experimental period, the rats were sacrificed, and interproximal tooth movements were measured.the mean amounts of tooth movement were 0.19mm in group a, 0.22mm in group b and 0.37mm in group c. statistical analysis with analysis of variance (anova) test showed significant differences between all groups. the least movement occurred in group a that had received fanta® drink.csds consumption decreases the rate of orthodontic tooth movement. the role of soft drinks in decreasing tooth movement might be related to its effects on bone metabolism.