The Influence of Dentin Demineralization on Morphological Features of Cavities Using Er:YAG Laser

Melo, Mary Anne S.; Lima, Jorge; Passos, Vanara Florêncio; Rodrigues, Lidiany Karla Azevedo

doi:10.1089/pho.2014.3758

Cited by 9 publications

(8 citation statements)

References 35 publications

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“…Concerning the morphological changes observed by SEM, findings such as loss of smear layer with exposed dentinal tubules, microcracks, rough or scaly surfaces and protruding tubules, were similar to those reported in other studies applying Er:YAG irradiation with water coolant (Esteves‐Oliveira et al, ; Lee et al, ; Melo et al ; Raucci‐Neto et al, ; Soares et al, ; Trevelin et al, ; Tokonabe et al, ; Yamada et al, ). Nevertheless, subsequent observations of dentin samples (before and after irradiation) have not been previously reported as in this study, corroborating that the baseline morphological characteristics were similar among groups.…”

Section: Discussionsupporting

confidence: 88%

Chemical and morphological changes in human dentin after Er:YAGlaser irradiation: EDS and SEM analysis

Contreras-Arriaga

Rodríguez‐Vilchis

Contreras‐Bulnes

et al. 2015

Microscopy Res & Technique

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Sixty samples of human dentin were divided into six groups (n = 10) and were irradiated with Er:YAG laser at 100 mJ-19.9 J/cm(2), 150 mJ-29.8 J/cm(2), 100 mJ-35.3 J/cm(2), 150 mJ-53.0 J/cm(2), 200 mJ-70.7 J/cm(2), and 250 mJ-88.5 J/cm(2), respectively, at 7 Hz under a water spray. The atomic percentages of carbon, oxygen, magnesium, calcium, and phosphorus and the Ca-to-P molar ratio on the dentin were determined by energy dispersive X-ray spectroscopy. The morphological changes were observed using scanning electron microscopy. A paired t-test was used in statistical analysis before and after irradiation, and a one-way ANOVA was performed (P ≤ 0.05). The atomic percent of C tended to decrease in all of the groups after irradiation with statistically significant differences, O and Mg increased with significant differences in all of the groups, and the Ca-to-P molar ratio increased in groups IV, V, and VI, with statistically significant differences between groups II and VI. All the irradiated samples showed morphological changes. Major changes in the chemical composition of dentin were observed in trace elements. A significant increase in the Ca-to-P ratio was observed in the higher energy density groups. Morphological changes included loss of smear layer with exposed dentinal tubules. The changes produced by the different energy densities employed could have clinical implications, additional studies are required to clarify them.

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Section: Discussionsupporting

confidence: 88%

Chemical and morphological changes in human dentin after Er:YAGlaser irradiation: EDS and SEM analysis

Contreras-Arriaga

Rodríguez‐Vilchis

Contreras‐Bulnes

et al. 2015

Microscopy Res & Technique

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“…In fact, the photothermal effect developed during the ablation can be responsible for the disinfection of residual bacteria in the cavities, without causing thermal damage to the dental pulp [ 18 ]. Finally, it has to be considered that laser irradiation melts inorganic components of dentin and can also cause remineralisation [ 20 , 21 , 22 ]. In this way, the Er:YAG laser allows a seal of treated dentinal surfaces and increases the resistance to recurrent caries [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Use of the Er:YAG Laser in Conservative Dentistry: Evaluation of the Microbial Population in Carious Lesions

et al. 2021

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The aim of this study is to investigate the Erbium:Yttrio-Aluminum-Granate (Er:YAG) laser photothermal and mechanical effects on cariogenic species concentration and on the microbial load composition of therapeutic cavities, in order to evaluate the possible micro-organisms reduction and make a comparison with manual and rotating conventional therapy (CT). A clinical trial was designed, including adults with active deep carious lesions on permanent teeth who were divided into two groups, i.e., control group and intervention group treated with CT and Er:YAG therapy, respectively. Before and after any conservative treatment, two oral samples were collected using a small sterile microbrush scrubbed within the base of the dentinal cavity tissue. The percentage of reduction and the colony-forming units (CFUs) count after Er:YAG and conventional treatments were compared for total microorganisms, including Candida spp., Streptococcus spp., and Lactobacillus spp. The microbial reduction varied from 90.2% to 100% and was significantly observed for total microorganisms and Streptococcus spp. (p < 0.05). The Er:YAG laser shows the potential for clinical applications, especially with paediatric and complicated patients, thanks to its minimally invasive properties and its effect on the reduction of microbial load.

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“…Additionally, high-speed dental turbines generate vibrations and sharp noises, which can make patients uncomfortable [ 1 , 2 , 3 , 4 , 5 ]. Furthermore, the currently used laser and dental turbines may stimulate the dental pulp, which can lead patients to endure varying degrees of pain [ 6 , 7 , 8 , 9 ]. Taper is one of the check points for achieving high-quality tooth preparation.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Adjusting the Taper and Adaption of Automatic Tooth Preparations with a High-Power Femtosecond Laser

Yuan

Liang

Lyu

2021

JCM

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This study explored the effect of the light-off delay setting in a robotically controlled femtosecond laser on the taper and adaption of resin tooth preparations. Thirty resin teeth (divided into six equal groups) were studied under different light-off delay conditions. Tapers from six vertical sections of the teeth were measured and compared among the light-off delay groups. The mean taper decreased from 39.268° ± 4.530° to 25.393° ± 5.496° as the light-off delay increased (p < 0.05). The average distance between the occlusal surfaces of the scanned data and the predesigned preparation data decreased from 0.089 ± 0.005 to 0.013 ± 0.030 μm as the light-off delay increased (p < 0.05). The light-off delay of the femtosecond laser is correlated with the taper and adaption of automatic tooth preparations; this setting needs to be considered during automatic tooth preparation.

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The Influence of Dentin Demineralization on Morphological Features of Cavities Using Er:YAG Laser

Cited by 9 publications

References 35 publications

Chemical and morphological changes in human dentin after Er:YAGlaser irradiation: EDS and SEM analysis

Chemical and morphological changes in human dentin after Er:YAGlaser irradiation: EDS and SEM analysis

Use of the Er:YAG Laser in Conservative Dentistry: Evaluation of the Microbial Population in Carious Lesions

A Novel Method for Adjusting the Taper and Adaption of Automatic Tooth Preparations with a High-Power Femtosecond Laser

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