Limits...
Effect of resin infiltration on the nanomechanical properties of demineralized bovine enamel.

Tostes MA, Santos E, Camargo SA - Indian J Dent (2014)

Bottom Line: Hardness data were statistically analyzed by non-parametric Kruskal-Wallis and MannWhitney tests (α = 0.05).The findings showed statistical difference between treatments at the same analyzed distance range from the outer surface of the enamel (P < 0.05).The untreated lesion showed lower hardness values for distances near the outer surface of the enamel.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatric Dentistry, School of Dentistry, Fluminense Federal University, Niterói, RJ, Brazil.

ABSTRACT

Objective: The aim of the present study was to evaluate the efficacy of resin infiltration in preventing in vitro lesion progression.

Materials and methods: Buccal surfaces of bovine incisors were divided into mesial and distal regions and, at the center, nail varnish was applied (1.0 mm width) to protect the enamel surface against any further treatment. In order to create artificial enamel lesions in the unprotected areas, each specimen was soaked in a demineralizing solution. After that, specimens had two enamel lesions. One lesion in each sample was etched with 15% HCl for 120 s and infiltrated with a commercial infiltrating resin for 3 min, while the other lesion was not treated (control). Each specimen was cross-sectionally halved and randomly allocated to two groups: Group 1 was immediately processed and Group 2 was submitted to a new demineralization process. The samples were analyzed by means of cross-sectional hardness measurements using a nanoindenter equipment. Hardness data were statistically analyzed by non-parametric Kruskal-Wallis and MannWhitney tests (α = 0.05).

Results: The findings showed statistical difference between treatments at the same analyzed distance range from the outer surface of the enamel (P < 0.05).

Conclusion: The untreated lesion showed lower hardness values for distances near the outer surface of the enamel. The resin infiltration was efficient in preventing further in vitro demineralization of bovine enamel lesions.

No MeSH data available.


Related in: MedlinePlus

Typical load versus displacement curves obtained from nanoindentation tests for higid enamel (h1), lesion (l1) and lesion infiltrated with Icon® light-curing resin (i1) samples. Measurements were carried out 5 ìm away from the enamel surface, under a load of 4.0 mN. The inset depicts the indent's location on each region of the sample. The direction of the indentation is normal to the plane of the figure
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4213871&req=5

Figure 2: Typical load versus displacement curves obtained from nanoindentation tests for higid enamel (h1), lesion (l1) and lesion infiltrated with Icon® light-curing resin (i1) samples. Measurements were carried out 5 ìm away from the enamel surface, under a load of 4.0 mN. The inset depicts the indent's location on each region of the sample. The direction of the indentation is normal to the plane of the figure

Mentions: Figure 2 shows the typical load-displacement curves obtained from nanoindentation tests carried out on higid enamel (h1), lesion (l1) and lesion infiltrated with Icon® resin (i1; Group 1 samples). In Figures 3 and 4, the obtained average hardness (h) values are plotted as a function of the distance from the outer surface of the enamel for the Group 1 and 2 samples. Both plots present large standard deviation bars at distances near the outer surface of the enamel (<60 μm).


Effect of resin infiltration on the nanomechanical properties of demineralized bovine enamel.

Tostes MA, Santos E, Camargo SA - Indian J Dent (2014)

Typical load versus displacement curves obtained from nanoindentation tests for higid enamel (h1), lesion (l1) and lesion infiltrated with Icon® light-curing resin (i1) samples. Measurements were carried out 5 ìm away from the enamel surface, under a load of 4.0 mN. The inset depicts the indent's location on each region of the sample. The direction of the indentation is normal to the plane of the figure
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4213871&req=5

Figure 2: Typical load versus displacement curves obtained from nanoindentation tests for higid enamel (h1), lesion (l1) and lesion infiltrated with Icon® light-curing resin (i1) samples. Measurements were carried out 5 ìm away from the enamel surface, under a load of 4.0 mN. The inset depicts the indent's location on each region of the sample. The direction of the indentation is normal to the plane of the figure
Mentions: Figure 2 shows the typical load-displacement curves obtained from nanoindentation tests carried out on higid enamel (h1), lesion (l1) and lesion infiltrated with Icon® resin (i1; Group 1 samples). In Figures 3 and 4, the obtained average hardness (h) values are plotted as a function of the distance from the outer surface of the enamel for the Group 1 and 2 samples. Both plots present large standard deviation bars at distances near the outer surface of the enamel (<60 μm).

Bottom Line: Hardness data were statistically analyzed by non-parametric Kruskal-Wallis and MannWhitney tests (α = 0.05).The findings showed statistical difference between treatments at the same analyzed distance range from the outer surface of the enamel (P < 0.05).The untreated lesion showed lower hardness values for distances near the outer surface of the enamel.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatric Dentistry, School of Dentistry, Fluminense Federal University, Niterói, RJ, Brazil.

ABSTRACT

Objective: The aim of the present study was to evaluate the efficacy of resin infiltration in preventing in vitro lesion progression.

Materials and methods: Buccal surfaces of bovine incisors were divided into mesial and distal regions and, at the center, nail varnish was applied (1.0 mm width) to protect the enamel surface against any further treatment. In order to create artificial enamel lesions in the unprotected areas, each specimen was soaked in a demineralizing solution. After that, specimens had two enamel lesions. One lesion in each sample was etched with 15% HCl for 120 s and infiltrated with a commercial infiltrating resin for 3 min, while the other lesion was not treated (control). Each specimen was cross-sectionally halved and randomly allocated to two groups: Group 1 was immediately processed and Group 2 was submitted to a new demineralization process. The samples were analyzed by means of cross-sectional hardness measurements using a nanoindenter equipment. Hardness data were statistically analyzed by non-parametric Kruskal-Wallis and MannWhitney tests (α = 0.05).

Results: The findings showed statistical difference between treatments at the same analyzed distance range from the outer surface of the enamel (P < 0.05).

Conclusion: The untreated lesion showed lower hardness values for distances near the outer surface of the enamel. The resin infiltration was efficient in preventing further in vitro demineralization of bovine enamel lesions.

No MeSH data available.


Related in: MedlinePlus