Regenerative amplifier cavity fillings

There are two types of laser dentistry procedures: hard and soft tissue procedures. The type of condition depends on the procedure the pediatric dentist will perform. Solea laser dentistry can treat both. Hard tissue procedures refer to procedures of the tooth. In hard tissue procedures, the lasers can detect tooth decay and can kill bacteria in cavities. Soft tissue procedures refer to procedures of the gums.

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• Pathophysiology and regeneration of the pulpodental complex
• Femtosecond Yb:KGW Regenerative Amplifier for Industrial Application
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• Laser Dentistry
• The amazing progress of high-power ultrafast thin-disk lasers
• Laser Dentistry: Enhancing Dental Treatment
• US4191928A - Laser system using regenerative amplifier - Google Patents
• High Harmonic Generation
• Management of the Vital Pulp and of Immature Teeth

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Pathophysiology and regeneration of the pulpodental complex

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Find more supplier details at the end of this encyclopedia article , or go to our. Using our ad package , you can display your logo and further below your product description. When a very intense light pulse is focused into a gas usually at reduced pressure , strong nonlinear interactions can lead to the generation of very high odd harmonics of the optical frequency of the pulse, i. Although only a tiny fraction of the laser power can be converted into higher harmonics, the frequency-upconverted output can still be useful for measurements down to wavelengths in the hard ultraviolet or even the X-ray spectral region.

Such high harmonics may be used instead of synchrotron radiation. Such attosecond pulses are now used for various fundamental studies e. Even zeptosecond pulses i. In most cases, the pump source used contains a passively mode-locked laser and a regenerative amplifier based on titanium—sapphire crystals as the gain media.

The repetition rate is then between a few hertz and a few kilohertz. Recently, however, a resonant cavity enhancement resonator has been used instead of an amplifier to increase the pulse energy to the level required for high harmonic generation [15]. This allowed for a much higher repetition rate of more than MHz. For the detection of weak high harmonics, one may use a microchannel plate followed by a phosphor layer and a CCD image sensor. More sophisticated models describe the quantum dynamics of the involved electrons.

For further dealing with the generated ultraviolet light, special ultraviolet optics are required. For the shorter wavelengths, the choice of available components is very restricted, and one can essentially use only reflective optics. Among them:. Here you can submit questions and comments. The author will decide on acceptance based on certain criteria. Essentially, the issue must be of sufficiently broad interest. Please do not enter personal data here; we would otherwise delete it soon.

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Bibliography [1] F. B 7 4 , , doi Li and L. Antoine et al. Mittleman et al. B 13 1 , , doi Spielmann et al. Brabec and F. Salieres and M. Drescher et al. Paul et al. Kienberger et al. Agostini and L. Seres et al. Jones et al. Gohle et al. Krausz et al. Winterfeldt, C.

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Femtosecond Yb:KGW Regenerative Amplifier for Industrial Application

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Few—cycle short—wave infrared SWIR pulses are useful tools for research on strong—field physics and nonlinear optics. By virtue of the tailored wavelength of the pump pulse of nm, we successfully obtained a gain bandwidth of more than one octave for a BBO crystal. The division and synthesis of the spectral components of the pulse in a Mach—Zehnder—type interferometer set in front of the final amplifier enabled us to control the dispersion of each spectral component using an acousto—optic programmable dispersive filter inserted in each arm of the interferometer.

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Participant : M. Ducret, S. Gobert, M. Bekhouche, E. Aubert-Foucher, M. Our general aim is to elucidate the immune, inflammatory, healing and regenerative events triggered in the human dental pulp by the oral bacteria present in caries lesions. We are currently more specifically interested in the two following topics :. Penetration of oral cariogenic bacteria into the enamel then dentin triggers an immune and inflammatory reaction in the underlying dental pulp intended to combat the microbial invaders. Owing to both their specific localization at the pulp-dentin interface and the embedding of their long cellular processes in dentin, odontoblasts are the first pulpal cells encountered by dentin-invading pathogens and their released products. Without treatment, developing caries lesions induce an irreversible inflammation in the human dental pulp which requires the devitalization of the tooth that is the removal of the damaged pulp tissue located in the endodontic space in the centre of the tooth then the filling of the endodontic space with an inert gutta percha-based biomaterial.

Laser Dentistry

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The amazing progress of high-power ultrafast thin-disk lasers

Metrics details. Dental pulp represents an easily accessible autologous source of adult stem cells. A subset of these cells, named dental pulp pluripotent-like stem cells DPPSC , shows high plasticity and can undergo multiple population doublings, making DPPSC an appealing tool for tissue repair or maintenance. DPPSC were harvested from the dental pulp of third molars extracted from young patients. Cells were cultured in specific differentiation media and their endothelial, smooth and skeletal muscle differentiation potential was evaluated.

Laser Dentistry: Enhancing Dental Treatment

Laser dentistry is a fairly new dental field that offers more comfortable treatment options for many dental procedures. Lasers make many treatments less invasive, more efficient, and more economical. Issues that are treatable with laser dentistry include:. Dentists use lasers in myriad different procedures that take place on the inside of the mouth, whether to eliminate some slightly excessive gum tissue, to reshape gums, or to brighten teeth that have become yellowed or stained by food, drink, or tobacco habits. In some cases, laser dentistry can be helpful for kids who get anxious or scared when having dental procedures completed. Lasers are not loud like a traditional drill, and they promote blood clotting, which can minimize bleeding and speed up healing.

US4191928A - Laser system using regenerative amplifier - Google Patents

An optical cavity , resonating cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers , surrounding the gain medium and providing feedback of the laser light. They are also used in optical parametric oscillators and some interferometers. Light confined in the cavity reflects multiple times, producing standing waves for certain resonance frequencies.

High Harmonic Generation

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Dentistry is a continuously changing field that has witnessed much advancement in the past century. Prosthodontics is that branch of dentistry that deals with replacing missing teeth using either fixed or removable appliances in an attempt to simulate natural tooth function. Complications that arise often lead to failures and frequent repairs of such devices which seldom allow true physiological function of dental and oral-maxillofacial tissues. Such factors can critically affect the quality of life of an individual. The market for dental implants is continuously growing with huge economic revenues.

Management of the Vital Pulp and of Immature Teeth

Understand the special physiologic and structural characteristics of the dentin-pulp complex and how they affect the pulpal response to injury. Recognize the indications, contraindications, and expected outcomes of the vital pulp therapy protocols. Recognize the tissue engineering techniques used to regenerating the dentin-pulp complex. Indicate the stem cells present in dental tissues and their potential to regenerate the dentin-pulp complex. The dental pulp is a highly specialized and complex loose connective tissue encased by mineralized tissues, namely enamel, dentin, and cementum. The dental pulp has close anatomic and functional relationship with the dentin, often referred as dentin-pulp complex Fig. Although the dental pulp is protected by a mineralized case, it is not impervious to irritation.

During my PhD I worked mostly on passively mode-locked c. Working with Roy Taylor, I demonstrated that such lasers could provide broad spectral coverage spanning from the blue to the near infrared. I published a theoretical paper on intracavity dispersion compensation using Gires-Tournois Interferometers and also did some work on synchronous pumping of dye lasers and pulse propagation in optical fibres.