Evaluation of Enamel Staining Susceptibility after Using Three Kinds of Orthodontic Adhesives and Four Different Clean-Up Techniques

Background: The present study tried to find the proper bonding and debonding technique to preserve the natural enamel surface and avoid discoloration.Methods: Sixty newly extracted human premolars were randomly divided into three groups, and three orthodontic adhesives were applied to bond the brackets: chemically cured System ۱ Plus adhesive (Ormco, USA) (CC), light-cured resin (Transbond XT, ۳Munitek, USA) (LC), and resin-modified glass ionomer cement (Fuji Japan) (GI). The specimens were immersed in black tea for one week and debonded. Four prophylactic methods were applied to remove residual resin: ۱) tungsten carbide bur (TC), ۲) tungsten carbide bur + Sof-Lex polisher (TC + SL), ۳) tungsten carbide bur + One Gloss Polisher (TC + OG), and ۴) tungsten carbide bur + Po-Go polisher (TC + PG). The enamel color was measured according to the CIE standard system (Commission International de l’Eclairage) by Konica Minolta CS Spectroradiometer equipment twice: ۱) natural enamel color before bonding and ۲) after bonding, staining, debonding, and polishing. The ΔE value is the tooth discoloration, which is measured from the mean Δa*, Δb*, and ΔL* values using the following formula ΔE = [(ΔL*)۲ + (Δa*)۲ + (Δb*)۲]۱/۲ for each group. Then, it was statistically analyzed using a t-test.Results and Conclusions: Regarding adhesive materials, CC adhesive showed higher discoloration than LC in all the polishing methods. The lowest discoloration was observed in GI. The highest ΔE* values were obtained using TC only, which was deemed insufficient to remove the residual adhesives. Applying TC + Sof-Lex and TC + PoGo equally enhanced the results; therefore, they were the best polishing methods.

کلیدواژه ها:

Orthodontic adhesive ، PoGo ، Prophylactic method ، Sof-Lex