Effect of resin infiltration on white spot lesions after debonding orthodontic brackets.
ABSTRACT To evaluate the effect of application of a resin infiltration material on masking the white spot lesions (WSLs) after bracket removal.
18 patients participated in this study and were divided into two groups of nine patients each; by a visual score based on the extent of demineralization, according to the classification of the WSLs. Group 1: Visible WSLs without surface disruption and Group 2: WSLs showed a roughened surface but not requiring restoration. Three successive photographs were taken for every patient; immediately after bracket removal, 1 week after oral hygiene measures and after Icon material application. The JPEG images were imported into image analysis software (Image J version 1.33u for Windows XP, US National Institutes of Health) which presented the images into histograms of gray scale from (0 to 255). Initial and final images were compared for percentage of WSLs masking area.
For both groups, a statistically significant difference at P<0.05 was obtained as follows; for WSLs in Group 1, the means at gray scale for the initial and the final photographs were 126.091 +/- 13.452 and 221.268 +/- 9.350 respectively and they revealed significance by Wilcoxon's signed rank test = 0.038, P<0.05. For WSLs in Group 2, the means at gray scale for the initial and the final photographs were 95.585 +/- 20.973 and 155.612 +/- 31.203 respectively and they revealed significance by Wilcoxon's signed rank test = 0.029, P<0.05.
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- "The progression of white spot lesions can be slowed or even arrested by non-operative measures that influence etiologic factors such as maintaining oral hygiene and use of remineralizing agents such as topical fluorides and casein phospho peptide-amorphous calcium phosphate. Although lesions can be arrested by these measures they still continue to pose esthetic problems referred to as “enamel scars”. At times they may not be effective and the carious lesions tend to progress. "
ABSTRACT: Early enamel lesions have a potential to re-mineralize and prevent caries progress. The aim of the following study is to determine the depth of penetration of low viscosity resin into artificially created enamel lesions. A sample of 20 sound premolars, indicated for orthodontic extraction, formed the study group. The teeth were coated with a nail varnish, leaving a window of 4 mm × 4 mm, on buccal surfaces of sound, intact enamel. Each tooth was subsequently immersed in demineralizing solution for 4 days to produce artificial enamel lesions. The demineralized area was then infiltrated with low viscosity resin (Icon Infiltrant, DMG, Hamburg, Germany) as per the manufacturer's instructions. All the restored teeth were then immersed in methylene blue dye for 24 h at 37°C. Teeth were then sectioned longitudinally through the lesion into two halves. The sections were observed under stereomicroscope at ×80 magnification and depth of penetration of the material was measured quantitatively using Motic software. The maximum depth of penetration of the resin material was 6.06 ± 3.31 μm. Resin infiltration technique appears to be effective in sealing enamel lesions and has great potential for arresting white spot lesions.Journal of Conservative Dentistry 03/2014; 17(2):146-9. DOI:10.4103/0972-0707.128054
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- "If these lesions persist for a long time, for example, after orthodontic bracket removal, they represent a severe esthetic problem and are frequently called as enamel scars. Although such lesions can be arrested by preventive measures, they still continue to pose esthetic problems. "
ABSTRACT: The earliest evidence of demineralization on the smooth enamel surface of a crown is a white spot lesion. The conventional treatment of these white spot lesions includes topical fluoride application, iamproving the oral hygiene, and use of remineralizing agents. The following article illustrates the use of a novel approach to treat smooth surface noncavitated white spot lesions microinvasively based on infiltration of enamel caries with low-viscosity light curing resins called infiltrants. This treatment aims upon both the prevention of caries progression and improving esthetics, by diminishing the opacity.09/2012; 3(Suppl 2):S199-202. DOI:10.4103/0976-237X.101092
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ABSTRACT: Abstract Objectives: To evaluate the in vivo effects of two acidic soft drinks (Coca-Cola and Sprite) on the shear bond strength of metal orthodontic brackets with and without resin infiltration treatment. In addition, the enamel surface was evaluated, after debonding, using a scanning electron microscope. Materials and Methods: Sixty non-carious maxillary premolars, scheduled for extraction in 30 orthodontic patients, were used. Patients were randomly divided into two groups according to the soft drink tested (Coca-Cola or Sprite). In each group, application of resin infiltration (Icon. DMG, Hamburg, Germany) was done on one side only before bonding of brackets. Patients were told to rinse their mouth with their respective soft drink at room temperature for 5 minutes, three times a day for 3 months. Shear bond strength was tested with a universal testing machine. After shearing test, a scanning electron microscope was used to evaluate enamel erosion. Statistical analysis was performed by two-way analysis of variance followed by the least significant difference test. Results: The Coca-Cola group without resin infiltration showed the lowest resistance to shearing forces. Scanning electron micrographs of both groups after resin application showed a significant improvement compared with results without resin use, as the enamel appeared smoother and less erosive. Conclusion: Pretreatment with the infiltrating resin has proved to result in a significant improvement in shear bond strength, regardless of the type of soft drink consumed.The Angle Orthodontist 01/2013; DOI:10.2319/091512-737.1 · 1.28 Impact Factor