High power, diode pumped Er:YAG for dentistry

Hagen, Clemens; Heinrich, A.; Nussbaumer, Bernhard

doi:10.1117/12.873549

Cited by 8 publications

(2 citation statements)

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“…minor bleeding or improved bacteria killing by defined heat profiles). First investigations on dental hard tissue show that despite of the relative low pulse energies ablation of dentin and enamel is possible, when the radiation is focused to a spot diameter of about 200µm [11].…”

Section: Introductionmentioning

confidence: 99%

Investigations on the potential of a novel diode pumped Er:YAG laser system for dental applications

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Hausladen

Hibst

2012

Lasers in Dentistry XVIII

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The successful clinical application of the Er:YAG-laser in dentistry is well known, documented by numerous published studies. These lasers are flash lamp pumped systems and emit pulses of typically some 100 µs duration with energies of up to 1 J. Pulse repetition rates can reach up to 100Hz, and mean powers are up to about 8W. As an alternative to these laser systems recently a novel diode pumped Er:YAG laser system (Pantec Engineering AG) became available. This laser can provide a pulse repetition rate up to 2kHz and a mean laser power up to 15W. The aim of the presented study is to investigate the effect of this laser system on dental hard and soft tissue at various irradiation parameters, particular at repetition rates more than 100 Hz.At first an appropriate experimental set-up was realized with a beam delivery and focusing unit, a computer controlled stepper unit with sample holder, and a shutter unit. The stepper unit allows to move the samples (dentin or enamel slides of extracted human teeth, chicken breast, pig bone) with a defined velocity during irradiation by various laser parameters. For rinsing the sample surface a water spray was also included. The laser produced grooves and cuts were analyzed by light microscopy and laser scanning microscopy regarding to the ablation quality, geometry, ablation efficacy, and thermal effects.The grooves in dentin and enamel show a rough surface, typical for Er:YAG laser ablation. The craters are slightly cone shaped with sharp edges on the surface. Water cooling is essential to prevent thermal injury. The ablation efficacy in dentin is comparable to literature values of the flash lamp pumped Er:YAG laser. The cutting of bone and soft tissue is excellent and appears superior to earlier results obtained with flash lamp pumped system. As a further advantage, the broad range of repetition rates allows to widely vary the thermal side effects.In conclusion, these first experiments with a diode pumped Er:YAG laser system on dental hard and soft tissue demonstrate its ability for use in dentistry.

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Section: Introductionmentioning

confidence: 99%

Investigations on the potential of a novel diode pumped Er:YAG laser system for dental applications

Stock

Hausladen

Hibst

2012

Lasers in Dentistry XVIII

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“…The flash-lamp pumped erbium solid-state lasers presently being used for dental hard tissue ablation are not suitable for this approach since they utilize high energy pulses and relatively low pulse repetition rates. Diode pumped Er:YAG lasers can achieve pulse repetition rates of 1–2 kHz 13 and they should also work effectively for this approach. Transverse excited atmospheric pressure (TEA) and radiofrequency excited carbon dioxide lasers can be operated efficiently at high repetition rates at wavelengths that are coincident with the strongest absorption of dental hard tissues near λ=9.3 and 9.6-μm due to the phosphate ion in hydroxyapatite.…”

Section: Introductionmentioning

confidence: 99%

Selective removal of demineralization using near infrared cross polarization reflectance and a carbon dioxide laser

Chan

Fried

2012

Lasers in Dentistry XVIII

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Lasers can ablate/remove tissue in a non-contact mode of operation and a pulsed laser beam does not interfere with the ability to image the tooth surface, therefore lasers are ideally suited for integration with imaging devices for image-guided ablation. Laser energy can be rapidly and efficiently delivered to tooth surfaces using a digitally controlled laser beam scanning system for precise and selective laser ablation with minimal loss of healthy tissues. Under the appropriate irradiation conditions such laser energy can induce beneficial chemical and morphological changes in the walls of the drilled cavity that can increase resistance to further dental decay and produce surfaces with enhanced adhesive properties to restorative materials. Previous studies have shown that images acquired using near-IR transillumination, optical coherence tomography and fluorescence can be used to guide the laser for selective removal of demineralized enamel. Recent studies have shown that NIR reflectance measurements at 1470-nm can be used to obtain images of enamel demineralization with very high contrast. The purpose of this study was to demonstrate that image guided ablation of occlusal lesions can be successfully carried out using a NIR reflectance imaging system coupled with a carbon dioxide laser operating at 9.3-μm with high pulse repetition rates.

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Fabrication, optical properties and LD-pumped 2.7μm laser performance of low Er3+ concentration doped Lu2O3 transparent ceramics

Qiao

Huang

Yang

et al. 2015

Journal of Alloys and Compounds

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High power, diode pumped Er:YAG for dentistry

Cited by 8 publications

References 0 publications

Investigations on the potential of a novel diode pumped Er:YAG laser system for dental applications

Investigations on the potential of a novel diode pumped Er:YAG laser system for dental applications

Selective removal of demineralization using near infrared cross polarization reflectance and a carbon dioxide laser

Fabrication, optical properties and LD-pumped 2.7μm laser performance of low Er3+ concentration doped Lu2O3 transparent ceramics

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