The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform

H Hausen - One of the best experts on this subject based on the ideXlab platform.

Laila Seppä - One of the best experts on this subject based on the ideXlab platform.

G. L. Powell - One of the best experts on this subject based on the ideXlab platform.

  • An In vitro study of enamel surface microhardness following argon laser irradiation and acidulated Phosphate Fluoride treatment
    Pediatric dentistry, 2003
    Co-Authors: Randall W. Ellis, Mark A. Latta, G. L. Powell
    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/cm 2 (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

  • Combined effects of acidulated Phosphate Fluoride and argon laser on sound root surface morphology: an in vitro scanning electron microscopy study.
    Journal of clinical laser medicine & surgery, 1999
    Co-Authors: M. John Hicks, Catherine M. Flaitz, Richard J. Blankenau, G. L. Powell
    Abstract:

    ABSTRACT Objective: The purpose of this in vitro scanning electron microscopy (SEM) study was to evaluate the effects of combining low fluence argon laser (AL) irradiation and acidulated Phosphate Fluoride (APF) treatment on the surface morphology of sound human root surfaces. Summary Background Data: Previous in vitro investigations have shown that combined APF and AL irradiation of root surfaces provided a protective effect against cariogenic challenges. Materials and Methods: Twelve extracted human molars were sectioned into quarters, and each quarter assigned to 1 of 4 treatment groups: (1) no treatment/control; (2) low fluence (11.5 J/cm2) AL irradiation; (3) 1.23% APF for 4 minutes; (4) APF treatment followed by low fluence AL irradiation. Surface morphology alterations were compared among groups using SEM techniques. Results: AL irradiation alone produced irregular textured surfaces with adherent globular material and fine microporosities in the background. APF treatment, alternatively, only create...

  • Effects of argon laser irradiation and acidulated Phosphate Fluoride on root caries.
    American journal of dentistry, 1995
    Co-Authors: Catherine M. Flaitz, Richard J. Blankenau, G. L. Powell
    Abstract:

    PURPOSE To determine the effects of argon laser irradiation (ArI) and topical acidulated Phosphate Fluoride (APF) treatment on artificial caries formation in root surfaces. MATERIALS AND METHODS After soft tissue debridement and Fluoride-free prophylaxis, the teeth were divided into quarters and acid-resistant varnish was applied, leaving windows of sound root surface exposed. Each tooth received four separate treatments: (1) Control-mesiobuccal quarter; (2) ArI only--mesiolingual quarter; (3) ArI followed by APF- distobuccal quarter; (4) APF followed by ArI-distolingual quarter. ArI was for 10 seconds at 2W (100J/cm2) and APF treatment was for 4 minutes. After artificial lesion formation, sections were prepared and evaluated with polarized light. Mean lesion depths were determined and compared (ANOVA & DMR for a paired design). RESULTS Mean lesion depths were: 347 +/- 41 microns--controls; 263 +/- 32 microns--ArI only; 158 +/- 21 microns--ArI followed by APF; and 149 +/- 17 microns -APF followed by ArI. Lesion depths were significantly different (P 0.05) was present between the combined APF and ArI groups. Argon laser irradiation significantly enhanced the resistance of root surfaces to demineralization. Combination of APF treatment with argon laser irradiation provided added protection against a constant artificial caries attack.

  • Argon laser irradiation and acidulated Phosphate Fluoride treatment in caries-like lesion formation in enamel: an in vitro study.
    Pediatric dentistry, 1995
    Co-Authors: Catherine M. Flaitz, Richard J. Blankenau, G. L. Powell
    Abstract:

    The purpose of this in vitro study was to determine the combined effects of argon laser irradiation (ArI) and acidulated Phosphate Fluoride treatment (APF) on caries-like lesion formation in human enamel. Each specimen was divided into tooth quarters with each quarter assigned to one of four groups: 1) control; 2) ArI Only; 3) ArI before APF treatment; 4) APF treatment before ArI. After a Fluoride-free prophylaxis, acid-resistant varnish was applied to the tooth quarters, leaving sou nd enamel windows exposed on buccal and lingual surfaces. Argon laser irradiation was at 2 watts for 10s (100 J/cm2 ). AP F treatment was with a 1.23 % APF gel for 4 min. Lesions were created in sound enamel windows with an acidified gel. After lesion formation, sections were obtained and imbibed with water for polarized light study. Body of the lesion depths were determined and compared among the four groups. Lesion depths were: 195 + 23 ~m for control; 129 + 17 ~m for ArI only; 96 + 14 [~mfor ArI before APF; and 88 + 11 I~mfor APF before ArI. Significant differences (P 0.05) was not found between the ArI before APF and the APF before ArI groups. Laser irradiation alone reduced lesion depth by 34% compared with control lesions. When ArI was combined with APF treatment, lesion depth decreased by more than 50% compared with control lesions, and by 26 to 32% when compared with lased-only lesions. Combining ArI and APF treatment significantly enhances the resistance of sound enamel to an in vitro cariogenic challenge. (Pediatr Dent 17:31-35, 1995)

Teemu Leppänen - One of the best experts on this subject based on the ideXlab platform.

Dalia M. Talaat - One of the best experts on this subject based on the ideXlab platform.

  • Casein Phosphopeptide Amorphous Calcium Phosphate Fluoride Varnish in Remineralization of Early Carious Lesions in Primary Dentition: Randomized Clinical Trial.
    Pediatric dentistry, 2021
    Co-Authors: Ahmed I Mekky, Karin Dowidar, Dalia M. Talaat
    Abstract:

    Purpose: Casein phosphopeptide amorphous calcium Phosphate Fluoride varnish (commercially available as MI Varnish®) is a promising minimally invasive remineralizing agent. The purpose of this study was to compare the effectiveness of intensive application of MI and sodium Fluoride (commercially available as Duraphat Varnish®) varnishes on white spot lesion remineralization. Methods: This randomized controlled clinical trial included a sample of 44 healthy three- to five-year-old children with at least four active white spot lesions on their anterior primary teeth. They were allocated into two groups: either a test group (MI Varnish®) or a control group (Duraphat Varnish®). Each group received three consecutive varnish applications two weeks apart. Selected teeth were evaluated for lesion activity and change in DIAGNOdent™ readings at follow-up periods of six, 18, and 30 weeks. Results: Both groups showed a significant decrease in the mean oral hygiene debris index score at different follow-up periods compared to baseline (P

  • Acid Resistance of Enamel Subsurface Lesions Treated with Casein Phosphopeptide Amorphous Calcium Phosphate Fluoride.
    Journal of dentistry for children (Chicago Ill.), 2015
    Co-Authors: Dalia M. Talaat, Amel Mahmoud
    Abstract:

    PURPOSE The purpose of this study was to evaluate the acid resistance of enamel subsurface lesions treated with casein phosphopeptide amorphous calcium Phosphate Fluoride (CPP-ACPF). METHODS Fifty extracted primary molars with a standardized window on enamel were immersed in a demineralizing solution for 72 hours to produce subsurface enamel lesions. They were sectioned in a buccolingual direction; one half of the sample was treated with the remineralizing agent CPP-ACPF and the other half remained untreated (control group). After 10 days, the sample was evaluated quantitatively using energy dispersive X-ray spectroscopy. The treated samples were reimmersed into the demineralizing solution for 72 hours and the mineral content was re-evaluated. RESULTS The mean calcium content of the remineralized samples was significantly higher than that of the control group (P