An In vitro study of enamel surface microhardness following argon laser irradiation and acidulated phosphate fluoride treatment

Gary H. Westerman, Randall W. Ellis, Mark A. Latta, G. Lynn Powell

Research output: Contribution to journalArticle

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Abstract

Purpose: The purpose of this in vitro study was to evaluate the effect of low-fluence argon laser (AL) irradiation and acidulated phosphate fluoride (APF) gel treatment on enamel microhardness. Methods: Twelve mandibular permanent molars were selected for this study. The teeth were sectioned generating 4 flat enamel surfaces per tooth. The flattened enamel tooth surfaces were randomly assigned to 1 of 4 treatment groups: (1) no treatment (control); (2) the enamel surface was exposed to a 4-minute, 1.23% APF gel treatment; (3) the enamel surface was exposed to AL irradiation of 11.5 J/cm2 (0.231-W, 5-mm beam size, 10 seconds); and (4) the enamel surface was exposed to the same AL irradiation followed by an APF gel treatment. Using a Buehler Micromet II Digital Microhardness Tester, Knoop hardness was determined using a 1, 000-gram load and a dwell time of 12 seconds. Five hardness values were recorded for each enamel surface. Data were analyzed using ANOVA and Fisher's least significant difference post-hoc test. Results: Mean surface hardness values (±SD) were 298±37 Knoop hardness (HK) for the no treatment (control), 270±70 HK for the APF-only group, 316±25 HK for the AL-only group, and 317±25 HK for the AL-before-APF group. The AL-only and AL-before-APF groups had significantly higher (P

Original languageEnglish
Pages (from-to)497-500
Number of pages4
JournalPediatric Dentistry
Volume25
Issue number5
StatePublished - 2003

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Acidulated Phosphate Fluoride
Argon
Dental Enamel
Lasers
Hardness
Tooth
Gels
In Vitro Techniques
Analysis of Variance

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

Cite this

An In vitro study of enamel surface microhardness following argon laser irradiation and acidulated phosphate fluoride treatment. / Westerman, Gary H.; Ellis, Randall W.; Latta, Mark A.; Powell, G. Lynn.

In: Pediatric Dentistry, Vol. 25, No. 5, 2003, p. 497-500.

Research output: Contribution to journalArticle

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