Camouflage effects following resin infiltration of postorthodontic white-spot lesions in vivo: One-year follow-up

Abstract

Objective: To assess camouflage effects by concealment of postorthodontic white-spot lesions (WSLs) to sound adjacent enamel (SAE) achieved over 12 months with resin infiltration (Icon, DMG, Hamburg, Germany). Methods: Twenty subjects (trial teeth n teeth 5 111) who had received resin infiltration treatment of noncavitated postorthodontic WSLs were contacted for a 1-year follow-up assessment of CIE-L*a*b* colors (T12). Color and lightness (CIE-L*a*b*) data for WSLs and SAE were compared to baseline data assessed before infiltration (T0) and those assessed after 6 months (T6), using a spectrophotometer. The target parameter was the difference between the summarized color and lightness values (DE WSL/SAE ). Intergroup (WSL, SAE) and intertime comparisons (T0 vs T6, T12) were performed using paired t-tests at a significance level of a 5 5%. Results: Nine subjects (trial teeth n teeth 5 49; male/female ratio 5/4; age range 13-19 years) were available at T12. After the highly significant reduction of DE WSL/SAE discrepancies between T0 and T6, analysis of 12-month records revealed color and lightness discrepancy of WSL vs SAE that was significantly decreased compared with baseline, indicating an assimilation of WSL color to SAE appearance after infiltration, while an additional reduction of discrepancies between T6 and T12 was not significant. Conclusion: As color and lightness characteristics of the Icon infiltrant as well as the esthetic camouflage effects achieved by WSL infiltration were not altered significantly or clinically relevant after 12 months, the method of resin infiltration can be recommended for an enduring esthetic improvement of postorthodontic WSL. (Angle Orthod. 2015;85:374-380.)

Infiltration of White-Spot-Lesions and developmental enamel defects

“…The effect of lesion progression as seen in approximal lesions was confirmed for labial lesions, also (34,36) . Furthermore, case reports and short-term studies (9,32,34,35,(37)(38)(39)(40)(41)(42)(43)(44)(45) describe a masking of WSL, up until 1 year following infiltration (32,37,46) . Hammad et al distinguished between infiltration of visible WSLs without surface disruption and WSLs with a roughened surface not requiring restoration, and reported significant improvement in both groups following infiltration.…”

Management of post-orthodontic White-Spot-Lesions: Clinical Handling of the Resin Infiltration Technique (Icon®, DMG)

“…Infiltration of fresh and more superficial lesions have been reported to be much easier compared to older, deeper-seated lesions with thicker pseudo-intact surface layers (Knösel et. al., 2013;Eckstein et al). The latter require several repetitions of etching intervals; the same seems to hold true for infiltration of brown spots (Knösel et.…”

“…Knösel et al performed a split-mouth controlled RCT on the subject of the durability of the achieved esthetic effects of WSL infiltration. They found that there was an assimilation of WSL color to surrounding enamel following infiltration that was color stable, without significant changes over at least 12 months (Knösel et al, 2013;Eckstein et al). Fig.…”

“…In the present case, WSL infiltration has been performed at an almost ideal point in time, which is closely following to the appointment of de-bonding. It is known that 2013; Eckstein et al, 2015). Infiltration of fresh and more superficial lesions have been reported to be much easier compared to older, deeper-seated lesions with thicker pseudo-intact surface layers (Knösel et.…”

“…The latter require several repetitions of etching intervals; the same seems to hold true for infiltration of brown spots (Knösel et. al., 2013;Eckstein et al;Neuhaus et al). In order to facilitate infiltration and improve the esthetic outcomes, the time elapse between debonding and infiltration should be as short as possible, in order to prevent remineralisation and hardening of surfaces by daily tooth brushing (Wiegand et al, 2007).…”