Abstract
Abstract Objective To evaluate enamel colour change over a period of one year after the completion of fixed appliance treatment and to assess the influence of two different clean-up procedures and the resulting surface roughness. Materials and methods Seventeen orthodontic patients were debonded and the residual resin removed using tungsten carbide burs followed by enamel polishing with Stainbuster burs or Sof-Lex discs in a split mouth design. A spectrophotometric colour evaluation was performed after clean-up (T0), polishing (T1), and one year later (T2). Colour parameters were measured and enamel colour change (ΔE) was calculated. Surface roughness was determined at T1 and T2 using epoxy replicas. Data were analysed using paired and unpaired t-tests and Pearson’s correlation. Results Significant differences in colour change and surface roughness caused by the polishing techniques at T1 were observed. However, this difference was not evident at T2 (p < 0.05). Surface roughness and colour change showed no significant correlation. Conclusion Enamel colour changed significantly when evaluated at T2 (one year post-orthodontic treatment). Stainbuster burs resulted in brighter and smoother teeth immediately after orthodontic treatment. The colour and surface roughness were not significantly different after one year and had no significant correlation.
Highlights
An attractive smile is comprised of facial, gingival, micro and macro aesthetics.[1]
There were no statistical differences between the two interventions, namely Sof-Lex and Stainbuster burs at all time points except in L value at T1 (Table III)
There was no significant correlation between surface roughness and enamel colour change (Table VI)
Summary
An attractive smile is comprised of facial, gingival, micro and macro aesthetics.[1]. The natural colour of enamel varies from light yellow to grayish (bluish) white and is extrapolated through the Munsell system, which involves parameters of hue, value and chroma.[2] colour is quantitatively better expressed through the Commission Internationale de l’Eclairage (CIE) colour parameters L*, a* and b*. Orthodontic treatment focuses on various aspects of aesthetics, with colour often being overlooked. Orthodontic treatment involves bonding, Previous in-vitro studies have analysed enamel colour change before, during, and after orthodontic treatment[11,12,13,14,15,16,17] and have reported significant enamel colour change following treatment. The few in-vivo studies that have corroborated the in-vitro findings have limited their reports to the immediate post-debonding phase.[8,9,10]
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