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Contemp Clin Dent. 2013 Apr;4(2):170-5. doi: 10.4103/0976-237X.114864.

Acquired acid resistance of human enamel treated with laser (Er:YAG laser and Co2 laser) and acidulated phosphate fluoride treatment: An in vitro atomic emission spectrometry analysis.

Author information

  • 1Department of Paedodontics, Mar Baselious Dental College, Kothamangalam, Ernakulam, Kerala, India.

Abstract

BACKGROUND:

Dental caries is essentially a process of diffusion and dissolution. If the aspect of dissolution can be curtailed some degree of prevention can be achieved.

AIMS:

The present study was carried out to evaluate and compare the effect of Er:YAG laser and Co2 laser irradiation combined with acidulated phosphate fluoride treatment on in vitro acid resistance of human enamel.

DESIGN:

An in vitro study was carried out on 30 human premolars to evaluate the enamel's acid resistance using an atomic emission spectrometry analysis.

MATERIALS AND METHODS:

A total of 60 enamel specimens were prepared from 30 human premolars and were randomly assigned to 6 groups: (1) Untreated (control); (2) 1.23% acidulated phosphate fluoride (APF) gel application alone for 4 min; (3) Er:YAG laser treatment alone; (4) Co2 laser treatment alone; (5) Er:YAG laser + APF gel application; (6) Co2 laser + APF gel application. The specimens were then individually immersed in 5 ml of acetate buffer solution (0.1 mol/L, pH 4.5) and incubated at 37°C for 24 h, and the acid resistance was evaluated by determining the calcium ion concentration using the atomic emission spectrometry.

STATISTICAL ANALYSIS:

An ANOVA model was constructed (P value of 0.05), followed by Tukey's test for multiple pair wise comparisons of mean values.

RESULTS:

Significant differences were found between the control group and the test groups (P < 0.001).

CONCLUSIONS:

Combining acidulated phosphate fluoride with either Er:YAG or Co2 laser had a synergistic effect in decreasing the enamel demineralization more than either fluoride treatment or laser treatment alone.

KEYWORDS:

Acidulated phosphate fluoride; Co2 laser; Er:YAG laser; acid resistance

PMID:
24015004
[PubMed]
PMCID:
PMC3757877
Free PMC Article

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