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Dental School of Azad University of Medical Sciences , asheibaninia@yahoo.com
Abstract:   (397 Views)

Background and aim: One of the problems of the fixed orthodontic treatments is the changes of surface characteristics of the orthodontic wires. Presence of the surface roughness on orthodontic wires can affect the corrosion, friction, dental movement, biocompatibility, and esthetic,which can prolong the treatment and interfere with tooth movement. This study addresses to evaluation and measurement of the influence of the most popular soft drink, Coka Cola on the surface roughness of nickel titanium and stainless steel wires.

Method and material: 10- orthodontic wire packages of nickel titanium and stainless steel with round (diameter of 0.016 inches) and rectangular (0. 016*0.022  inches) cross section of American Orthodontic (AO) company prepared in 10 millimeter pieces. The samples were cleaned with alkaline solution and then surface roughness of the wires (Rₐ, Rq, Rz) were tested by profilometer machine. This process was repeated daily for 30 days. Eventually, the same surface roughness parameters were re-evaluated and compared with the amount before the intervention. We used Cronbach's alpha test For evaluation of internal consistency of primary datas, and in each group for before and after changes were measured by  Wilcoxon test and to test the meaningfulness of differences between groups Mann-u-Whitney stastical analyse was used.
Result: Statistical analysis showed that the changes on Rₐ, Rq, Rz in all four groups weren’t significant (P<0.9). Also, Rₐ, Rq, Rz before inserting the wires in Coka Cola showed that each variables in stainless steel group is more than Ni-Ti groups.These findings were the same after placing the samples in the Coka Cola (P<0.9, P<0.9, P<0.9)
Discussion and Conclusion: it can be concluded that the carbonated drinks can not affect the surface roughness of arch wires neither treatment duration.
Type of Study: Original | Subject: dentistry
Received: 2021/11/10 | Accepted: 2022/02/8

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