Objectives: To analyze the color stability of feldspathic porcelain veneers treated with different surface preparation methods after bonding/debonding orthodontic brackets. Materials and methods: 25 feldspathic porcelain veneers samples were divided into groups according to surface treatment procedures: (S) glaze-layer retained; (SHF) hydrofluoric acid etch; (SOXA) sandblasting; (SB) diamond burs; and control (C). Specimens were primed using silane and brackets were bonded. After removal of brackets, Color stability (NBS score) was determined following coffee staining for 21 days.
Results: No significant interclass difference was identified between overall color stability for the four test groups (S, SHF, SOXA and SB). All test groups showed a statistical significant increase in color change compared to the control. Conclusions: Surface treatment resulted in a significant decrease in color stability with no statistical difference between treatments. Regardless of surface preparation method, bonding and debonding of orthodontic bracket results in decreased color stability of feldspathic porcelain veneers.