Structural Changes on Human Dental Enamel Treated with Er:YAG, CO2 Lasers and Remineralizing Solution: EDS Analysis

Contreras‐Bulnes, Rosalía; Olea-Mejía, Oscar; Rodríguez‐Vilchis, Laura Emma; Scougall‐Vilchis, Rogelio José; Centeno-Pedraza, Claudia

doi:10.5772/28867

Cited by 6 publications

(7 citation statements)

References 75 publications

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“…These mineral and structural changes brought by the laser irradiation could be the possible reason that a significantly high microhardness value was achieved. As mentioned earlier, along with the melting of enamel surface, fine cracks and fissures could also be visualized which might act as retentive areas for plaque as also observed in other studies like that of ContrerasBulnes R et al, [13] where in after surface treatment with CO 2 laser (10.6 µm), SEM analysis of enamel surface revealed rough areas, craters and cracks. In contrast to this, there have been studies which do not report any unwanted appearance of cracks over the enamel surface after the application of CO 2 laser and claim that a smooth morphology of enamel is obtained with CO 2 laser treatment [10,14,15,27,31].…”

Section: Discussionmentioning

confidence: 53%

“…This energy is efficiently absorbed and converted to heat without damage to the underlying tissues, thereby causing ultrastructural and chemical modifications on the irradiated enamel leading to increased resistance to acid dissolution [8]. Although many approaches which limit enamel demineralization have been tried and tested and also yielded positive results in decreasing demineralization, but most studies to date have evaluated the effect of CO 2 lasers, Er,Cr:YSGG lasers and fluoride applications on the demineralization process in vitro [12][13][14][15]. …”

mentioning

confidence: 99%

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SEM Evaluation of Enamel Surface Changes and Enamel Microhardness around Orthodontic Brackets after Application of CO2 Laser, Er,Cr:YSGG Laser and Fluoride Varnish: An In vivo Study

Kaur

Tripathi

Rai

et al. 2017

JCDR

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Section: Discussionmentioning

confidence: 53%

mentioning

confidence: 99%

SEM Evaluation of Enamel Surface Changes and Enamel Microhardness around Orthodontic Brackets after Application of CO2 Laser, Er,Cr:YSGG Laser and Fluoride Varnish: An In vivo Study

Kaur

Tripathi

Rai

et al. 2017

JCDR

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“…The pits on the surface show that material above the enamel rod has melted and in some areas has re-solidified to fuse boundary rods [4,20]. The melting process shows that remineralization of the surface can occur [21]. When human enamel is heated the phenomenon of sputtering can occur due to rapid expansion of gaseous decomposition products (e.g.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

Morphological, structural and hardness changes of human dental enamel irradiated with a Nd:YAG laser

et al. 2018

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Laser technology has become an indispensable part of modern dental practice, used in conjunction with or as an addition to other techniques. This paper focuses on applications of lasers in caries progression and surface hardness/acid resistance and the laser settings needed for clinical application. Enamel of human molar teeth was treated with a Nd:YAG laser (1064 nm) with varying numbers of laser pulses. The corresponding changes induced in the morphology, chemical composition, hardness and structure of human enamel were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, the Vickers hardness test and x-ray diffractometry, respectively. Etching, eruption, melting, recrystallization and cracking were observed in the morphology of enamel, while the hardness of the material increased as the number of pulses was varied. A decrease in intensity position of the hydroxyl group was observed, which is associated with the chemical change. The carbonate content also decreased, which accounts for the increase in acid resistance, but no such difference was observed in the phosphate content. A slight difference in lattice constant was also observed due to loss of structural water from hydroxyapatite. The results show that lasers can be additional resource in controlling the progression of caries in enamel.

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“…The prophylactic efficiency of exogenous methods, namely tooth brushing, gel application and laser irradiation, has been demonstrated [20,21,[24][25][26][27][28]. However, such exogenous methods do not promote the balance between the natural processes of mineral loss and their replacement in the plaque fluid and mixed saliva [29].…”

Section: +mentioning

confidence: 99%

Does dentifrice provide the necessary saturation of ions in oral fluids to favour remineralisation?

Seredin¹,

Goloshchapov²,

Yuri³

et al. 2018

Russ Open Med J

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Background -Changes in the molecular composition of mixed human saliva using endogenous and exogenous methods of caries prevention were studied and the duration of these changes in relation to the initial state of the oral fluid was determined. Material and Methods -In total, 200 European healthy, addiction-free, university-educated males and females, aged 22-30 were recruited for the study. Participants collected their mixed saliva samples after the use of a multi-mineral toothpaste (exogenous prevention) and after three days of taking a calcium glycerophosphate tablet (endogenous prevention). In the first stage of the study, samples of mixed saliva were analysed by infrared (IR) lab spectrometer and equipment of infrared microspectroscopy beamline at the Australian Synchrotron (Victoria, Australia) was used in the second stage of study. Results -Based on the experimental data obtained by IR-spectroscopy technique, the mineral/organic and carbon/phosphate ratios were calculated. The changes in the organic mineral balance of the oral cavity induced by these two preventive methods were analysed. The statistical significance of the results for the confidence level of p is indicated. The data shows that changes in the molecular composition of mixed saliva when using an exogenous method of caries prevention only provides a short-term effect, continuing for the first 30 minutes after the preceding prevention. Moreover, calcium glycerophosphate tablets can change the organic-mineral balance in mixed saliva, increasing the content of mineral groups and complexes. The content of endogenous, biologically accessible phosphate groups and complexes in the mixed saliva exceeds by approximately 12% that of the mixed saliva before the use of the prevention agents. Conclusion -Use of calcium glycerophosphate tablets in combination with brushing (a combination of endogenous and exogenous prevention methods) leads to the long-term presence of high concentrations of ions, mineral complexes and groups (phosphates) in the oral fluid.

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Structural Changes on Human Dental Enamel Treated with Er:YAG, CO2 Lasers and Remineralizing Solution: EDS Analysis

Cited by 6 publications

References 75 publications

SEM Evaluation of Enamel Surface Changes and Enamel Microhardness around Orthodontic Brackets after Application of CO2 Laser, Er,Cr:YSGG Laser and Fluoride Varnish: An In vivo Study

SEM Evaluation of Enamel Surface Changes and Enamel Microhardness around Orthodontic Brackets after Application of CO2 Laser, Er,Cr:YSGG Laser and Fluoride Varnish: An In vivo Study

Morphological, structural and hardness changes of human dental enamel irradiated with a Nd:YAG laser

Does dentifrice provide the necessary saturation of ions in oral fluids to favour remineralisation?

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