Caries Infiltration Research Articles

Efficacy of Bleaching Treatment on Demineralized Enamel Treated with Resin Infiltration Technique

ABSTRACTThe aim of this study was to investigate the effect of bleaching treatment with 10% carbamide peroxide in white spot lesions-affected teeth treated with caries infiltration technique. Cylindrical enamel-dentin specimens were prepared from bovine incisors. Baseline color measurement was performed by a spectro-photometer using the CIE L*a*b* system and specimens were divided in two groups: Sound (S) and demineralized (D) enamel. The group S was divided into two subgroups (n = 20): Nonbleached (SNB) and bleached (SB). The group D was divided in four subgroups (n = 20): Nonbleached (DNB), bleached (DB), resin infiltrated/nonbleached (DRNB) and resin infiltrated/bleached (DRB). Artificial white spot lesions were produced in all groups D, simulating the presence of active lesions in labial tooth surface, and after demineralization, caries infiltration with low viscosity resin was performed in the resin infiltrated groups. In the bleached groups, 10% carbamide peroxide gel was applied (2 hours/day for 14 days). New color measurements were performed after bleaching and color alteration was calculated using ΔE parameter. Data were submitted to one-way ANOVA and Tukey test (5%). There were significant differences among groups when ΔE was evaluated (p = 0.001). Means (± standard deviation) and results of Tukey test were: SNB (2.53 ± 0.48)a; DRNB (2.88 ± 1.03)ab; DNB (3.15 ± 0.65) ab; DRB (2.88 ± 1.03)bc; SB (4.33 ± 0.93)cd; DB (5.27 ± 1.33)d. The bleaching treatment with 10% carbamide peroxide produced no significant color alteration in demineralized enamel treated with resin infiltration technique.How to cite this articleSantos LFTF, Rêgo HMC, Borges AB, Pucci CR, Torres CRG. Efficacy of Bleaching Treatment on Demineralized Enamel Treated with Resin Infiltration Technique. World J Dent 2012;3(4):279-283.

Caries infiltration of noncavitated white spot lesions: A novel approach for immediate esthetic improvement

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.

Penetration depths of an infiltrant into proximal caries lesions in primary molars after different application times in vitro

Caries infiltration aims to inhibit lesion progression, by occluding the porosities within the lesion body with low-viscosity resins. The ability in hampering lesion progression is correlated with the penetration depth (PD) of the infiltrant. This study aimed to compare the infiltration depths into proximal lesions in primary molars after different application times. Noncavitated natural caries lesions (n = 83) were etched with 15% HCl for 2 min and infiltrated for 0.5, 1, 3, or 5 min. Specimens were sectioned and PD at the maximum lesion depth (LD(max)) were analysed using dual fluorescence confocal microscopy. Percentage penetrations (PD/LD(max)) were significantly higher after 3 or 5 min compared with 0.5-min application (P < 0.05; Mann-Whitney test). For LD(max) <400 μm, no significant differences were observed between application times (P > 0.05). For LD(max) ≥400 μm, 3- and 5-min application resulted in significantly deeper infiltration compared with 0.5 min (P < 0.05). After 1-min application, PD was significantly lower than 5 min (P < 0.05), PD/LD(max) did not differ from all other groups (P > 0.05). Natural noncavitated proximal lesions in primary molars were deeply infiltrated after 1-min application in vitro. For deeper lesions, however, more consistent results were obtained after 3 min.

Resin infiltration of proximal caries lesions differing in ICDAS codes

Resin infiltration of non-cavitated proximal caries lesions has been shown to inhibit further demineralization. However, the effect of resin infiltration in cavitated lesions is unknown. Therefore, the aim of this in vitro study was to evaluate infiltration patterns of proximal caries lesions differing in International Caries Detection and Assessment System (ICDAS) codes. Extracted human molars and premolars showing proximal caries lesions with and without cavitations (ICDAS codes 2-5) were etched with 15% hydrochloric acid gel and resin infiltrated according to the manufacturer's instructions. Three sections from each lesion were prepared and analyzed using a dual-fluorescence staining technique and confocal microscopy. The dimensions of the demineralized and cavitated lesions areas, as well as the resin-infiltrated parts within these lesions, were measured. The demineralized parts were infiltrated from 73% to 100% (median values) but the cavities were filled only negligibly (0-5%). Teeth that had an ICDAS code of 5 showed a significantly lower percentage infiltration/filling of lesions compared to teeth with ICDAS codes of 2 and 3. It was concluded that under in vitro conditions the tested infiltrant penetrates most parts of the demineralized enamel but is not capable of filling up cavities and therefore the efficacy of caries infiltration, particularly in lesions with larger cavitations, might be impaired.

Effect of caries infiltration technique and fluoride therapy on the colour masking of white spot lesions

ObjectivesA carious lesion is initiated through the subsurface demineralization of enamel, and presents clinically as a white spot, interfering with the aesthetics. This lesion should not receive restorative treatment because it is capable of remineralization. The aim of this study was to evaluate the performance of different treatments on masking white spot lesions by assessing the colour change. MethodsArtificial white spot lesions were produced in bovine enamel of 60 cylindrical-shaped samples. The samples were randomly divided into four groups: CON (control) – immersion in artificial saliva; DF – daily application of 0.05% fluoride solution; WF – weekly application of 2% fluoride gel; and IC – resin infiltration (Icon® – DMG). The assessment of colour was performed by a spectrophotometer in four distinct stages: baseline, after the production of artificial caries; after 4 weeks; after 8 weeks; and after a new acid challenge. The ΔL values were calculated at each stage in relation to the baseline colour. ResultsThe application of RM ANOVA revealed significant differences between the factors’ treatment and time (p=0.001). For the interaction between factors there were no significant differences (p=0.27). The Tukey's test (p<0.05) was then applied and showed that the specimens treated with Icon® exhibited the lowest means, followed by Group DF, Group CON, and Group WF, in that order. ConclusionResin infiltration was proven to be an effective treatment for masking white spot lesions. Also, after a new acid challenge, the group infiltrated with low viscosity resin presented the lowest means of colour change.

Caries infiltration therapy

Caries infiltration therapy

Caries infiltration therapy

Caries infiltration therapy