Effect of laser beam impacts on teeth

Goldman, Leon; Gray, J. A. B.; Goldman, John A.; Goldman, Bernard S.; Meyer, Robert G.

doi:10.14219/jada.archive.1965.0260

Cited by 128 publications

(45 citation statements)

References 4 publications

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“…Since the introduction of ruby laser to human teeth 1) , many experiments have reported on the effects of different laser systems -such as ruby, CO2, and Nd: YAG lasers -on dental hard tissues [2][3][4] . The results of early experiments with lasers were not promising because of insufficient ablation efficiency and undesirable side effects such as melting, cracking and charring of enamel and dentin, and pulpal damage caused by overheating [3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Pulse Duration of Er: YAG Laser on Dentin Ablation

Nishimoto

Otsuki

Yamauti³

et al. 2008

Dent. Mater. J.

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The present study examined the effects on dentin ablation efficiency arising from various pulse durations of Er: YAG laser at a fixed energy fluence. Ten flat human dentin disks were prepared and exposed to an Er: YAG laser at 1 pps for three seconds at pulse durations of 100 -500 μsec with 150 mJ/pulse (40.0 J/cm 2 •pulse). The depth and diameter of the ablated dentin were measured and the ablation volume was estimated. Irradiated surfaces and cross-sections were observed using a SEM. Depth of the removed dentin increased and the diameter of the spot decreased without a change in the estimated volume at increased pulse durations. SEM observation of the irradiated surfaces revealed that there were no morphological differences when the pulse duration was changed. When the specimens were cross-sectioned, the ablated dentin had a dome shape and there was a dark layer under the irradiated surface.

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Section: Introductionmentioning

confidence: 99%

Effect of Pulse Duration of Er: YAG Laser on Dentin Ablation

Nishimoto

Otsuki

Yamauti³

et al. 2008

Dent. Mater. J.

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“…[2][3][4] However, the earliest developed lasers, such as carbondioxide (CO 2 ) and neodymiumdoped:yttrium-aluminum garnet (Nd:YAG), required relatively high-energy densities to vaporize the hard tissues and lead to major thermal side effects, such as melting, cracking or charring of enamel, dentin and pulpal damage. [5][6][7][8] Hence, these laser systems are not advised for use in hard tissue treatments, even though they have widespread usage in soft tissues.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Laser Devices on the Composition and Microhardness of Dentin

Çelik

Ergücü²,

Türkün³

et al. 2008

Operative Dentistry

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This study determined the compositional changes and microhardness of the cavity floor prepared by Er,Cr:YSGG and Er:YAG lasers and compared the results with the conventional method of bur preparation. Fifteen non-carious human molars were used in this study. On the buccal and lingual surfaces of each tooth, two cavities (mesio-distal 3 mm, inciso-gingival 3 mm, depth 2 mm) were prepared with two different laser devices (Er,Cr:YSGG laser; Waterlase MD and Er:YAG laser; KaVo Key Laser 3) and a highspeed turbine. The teeth were embedded into polyester resin and cross-sectioned. The microhardness measurements from the floor of each half cavity were recorded with the Vickers surface hardness tester. The remaining halves of the cavities were subjected to SEM-EDS atomic analysis. The results were statistically evaluated by one-way ANOVA and Kruskal Wallis tests (p=0.05). No significant differences were observed among the microhardness values, quantities of Ca (Ca weight %), P (P weight %) and Ca/P ratio of the lased and conventionally prepared cavities (p>0.05). The cavity preparation techniques and differences in laser devices did not significantly alter the composition and microhardness of dentin tissue. Both laser devices used in this study were observed to lead

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“…These effects are a result of excess heat production during laser treatment [1][2][3] . Erbium-doped: yttrium-aluminum-garnet (Er:YAG) laser -with a wavelength of 2.94 μm -can remove dental caries together with sound enamel and dentin 4) .…”

Section: Introductionmentioning

confidence: 99%

Analysis of Er:YAG Lased Dentin Using Attenuated Total Reflectance Fourier Transform Infrared and X-ray Diffraction Techniques

et al. 2007

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The purpose of this study was to investigate the chemical characteristics of dentin after Er:YAG laser irradiation using various output energies with or without water irrigation. Analysis was carried out by means of attenuated total reflectance Fourier transform infrared spectroscopy (FT-IR/ATR) and X-ray diffraction (XRD). Furthermore, the relative infrared peak intensities of dentin specimens were compared statistically. Results showed that Er:YAG laser with an output energy of 100 mJ/pulse with water irrigation did not cause any detectable change in dentin. However, a higher energy output or the absence of water irrigation affected the organic portion of dentin. With XRD, no obvious phase changes were observed between the XRD pattern of the control (non-irradiated) dentin powder and those after Er:YAG irradiation -regardless of Er:YAG laser output energy or dehydration condition. It was suggested that the intrinsic water content of dentintogether with extrinsic water irrigation -were important factors to achieving the desired outcome of dentin ablation by Er:YAG laser.

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Effect of laser beam impacts on teeth

Cited by 128 publications

References 4 publications

Effect of Pulse Duration of Er: YAG Laser on Dentin Ablation

Effect of Pulse Duration of Er: YAG Laser on Dentin Ablation

Effect of Different Laser Devices on the Composition and Microhardness of Dentin

Analysis of Er:YAG Lased Dentin Using Attenuated Total Reflectance Fourier Transform Infrared and X-ray Diffraction Techniques

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