Dr. Thomas Peter Ertl Profile

Dr. Thomas Peter Ertl

at DeguDent GmbH

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Author

Publications (16)

SPIE Journal Paper | 22 June 2018 Open Access

Parallelized Monte Carlo software to efficiently simulate the light propagation in arbitrarily shaped objects and aligned scattering media

Christian Johannes Zoller, Ansgar Hohmann, Florian Forschum, Simeon Geiger, Martin Geiger, Thomas Peter Ertl, Alwin Kienle

JBO, Vol. 23, Issue 06, 065004, (June 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.6.065004

KEYWORDS: Monte Carlo methods, Scattering, Photons, Light scattering, Teeth, Light sources, Absorption, Optical properties, Software development, Refractive index

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Proceedings Article | 25 August 2017 Paper

Massively parallelized Monte Carlo software to calculate the light propagation in arbitrarily shaped 3D turbid media

Christian Zoller, Ansgar Hohmann, Thomas Ertl, Alwin Kienle

Proceedings Volume 10412, 1041223 (2017) https://doi.org/10.1117/12.2286079

KEYWORDS: Monte Carlo methods, Color prediction

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Proceedings Article | 8 February 2017 Paper

Laser Doppler pulp vitality measurements: simulation and measurement

T. Ertl

Proceedings Volume 10044, 100440F (2017) https://doi.org/10.1117/12.2257249

KEYWORDS: Monte Carlo methods, Teeth, Doppler effect, Photons, Blood circulation, Receivers, Transmitters, Optical fibers, Semiconductor lasers, Computer simulations

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Proceedings Article | 4 March 2015 Paper

Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology

M. Zint, K. Stock, R. Graser, T. Ertl, Edgar Brauer, J. Heyninck, J. Vanbiervliet, Stefaan Dhondt, Pieter De Ceuninck, Raimund Hibst

Proceedings Volume 9313, 93130U (2015) https://doi.org/10.1117/12.2077574

KEYWORDS: Teeth, 3D modeling, Scanners, Distance measurement, 3D scanning, Optical spheres, Confocal microscopy, Sensors, Colorimetry, Prototyping

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Proceedings Article | 24 February 2015 Paper

Chromatic dispersive confocal technology for intra-oral scanning: first in-vitro results

T. Ertl, M. Zint, Annelene Konz, E. Brauer, H. Hörhold, Raimund Hibst

Proceedings Volume 9306, 93060B (2015) https://doi.org/10.1117/12.2079008

KEYWORDS: Teeth, Scanners, Bridges, Confocal microscopy, Data modeling, In vitro testing, Colorimetry, Optical design, Water, Laser applications

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Proceedings Article | 28 February 2000 Paper

Geometry and rendering optimizations for the interactive visualization of crash-worthiness simultations

Ove Sommer, Thomas Ertl

Proceedings Volume 3960, (2000) https://doi.org/10.1117/12.378888

KEYWORDS: Visualization, Volume rendering, OpenGL, Data modeling, Visual process modeling, Computer aided design, Tolerancing, Finite element methods, Optimization (mathematics), Chemical elements

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Proceedings Article | 19 January 1998 Paper

Effects of pulsed Er:YSGG and Ho:YAG laser on the organ of Corti of the guinea pig cochlea: a scanning electron microscopic study

Yasmin Jamali, Sergije Jovanovic, Uwe Schoenfeld, D. Anft, Thomas Ertl, Hans Scherer, A. Berghaus, Gerhard Mueller

Proceedings Volume 3193, (1998) https://doi.org/10.1117/12.300831

KEYWORDS: Fusion energy, Pulsed laser operation, Ear, Scanning electron microscopy, Safety, Laser applications, Laser irradiation, Convolution, Laser safety, Laser systems engineering

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Laser stapedotomy has now become an established method in the surgical treatment of otosclerosis. Recent experimental studies have demonstrated that, apart from the continuous wave lasers, several pulsed laser systems are also suitable for stapes management. Experiments were performed in guinea pigs to clarify which, if any, of the pulsed lasers used can damage the inner ear on application of the laser parameters required for the stapedotomy. The basal convolution of the guinea-pig cochlea was chosen as the application site. Acoustic evoked potentials (compound action potentials) yielded information on inner-ear function. With the Er:YSGG laser (energy: 85 J/pulse, energy density: 36 J/cm², total energy: 0.425 J), five applications to the cochlea are necessary for a foot plate perforation of 500 - 600 micrometers . With the Ho:YAG laser, an adequately large perforation can be achieved with at least 10 applications of an energy of 210 mJ per pulse (energy density: 90 J/cm², total energy: 2.1 J). The aim of this study was: (1) to clarify whether the Er:YSGG and Ho:YAG laser could cause morphological changes in the organ of Corti of the guinea pig on application of the laser parameters required for stapedotomy, and (2) to verify our experimental electrophysiological results and correlate them with the morphological changes detected in the organ of Corti in the guinea pig cochlea by scanning-electron-microscopic examination. It shows that the effective laser parameters (5 X 85 mJ) of the Er:YSGG-laser cause no changes of the guinea pig cochlea. Even with the application of 25 pulses with the same energy the guinea pig cochlea shows normal appearance. The effective laser parameters of the Ho:YAG laser (10 X 210 mJ) show changes in the outer hair cells in the form of stereocilie fusion and giant hair cell formation while the inner hair cells and supporting cells are showing normal appearance. Our results clearly demonstrate a high application safety for the Er:YSGG laser, while the Ho:YAG-laser is not well tolerated in the animal experiment and has only a low application safety. Its application in stapedotomy would be unreliable and dangerous for the inner ear. Our results also clearly show that the electrophysiological data correlate well with the scanning- electron-microscopic data.

Proceedings Article | 22 December 1997 Paper

Application of lasers in endodontics

Thomas Ertl, Hartmut Benthin, Boris Majaron, Gerhard Mueller

Proceedings Volume 3192, (1997) https://doi.org/10.1117/12.297859

KEYWORDS: Laser dentistry, Dentistry, Teeth, Bacteria, In vitro testing, Thermal effects, Ultraviolet radiation, Light sources

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Proceedings Article | 19 January 1996 Paper

Scanning ablation of dental hard tissue with Erbium laser radiation

M. Zeck, Hartmut Benthin, Thomas Ertl, G. Siebert, Gerhard Mueller

Proceedings Volume 2623, (1996) https://doi.org/10.1117/12.230320

KEYWORDS: Laser ablation, Er:YAG lasers, Laser dentistry, Pulsed laser operation, Thermal effects, Laser tissue interaction, Picosecond phenomena, Energy efficiency, Laser systems engineering, Erbium lasers

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Proceedings Article | 19 January 1996 Paper

Biocompatibility of Er:YSGG laser radiated root surfaces

Hartmut Benthin, Thomas Ertl, Dirk Schmidt, Peter Purucker, J.-P. Bernimoulin, Gerhard Mueller

Proceedings Volume 2623, (1996) https://doi.org/10.1117/12.230328

KEYWORDS: Pulsed laser operation, Teeth, Natural surfaces, Scanning electron microscopy, Tissues, Laser therapeutics, Nd:YAG lasers, Laser ablation, In vitro testing, Thermal effects

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Proceedings Article | 23 December 1994 Paper

Root canal preparation with Er:YSGG laser

Hartmut Benthin, Thomas Ertl, B. Onal, Stephan Schruender, Gerhard Mueller

Proceedings Volume 2327, (1994) https://doi.org/10.1117/12.197598

KEYWORDS: Laser dentistry, Laser applications, Fiber lasers, Laser ablation, Teeth, Medical laser equipment, Electron microscopes, Laser tissue interaction, Er:YAG lasers, Scanning electron microscopy

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Proceedings Article | 23 December 1994 Paper

Thermal and acoustic problems on root canal treatment with different lasers

Thomas Ertl, Hartmut Benthin, Gerhard Mueller

Proceedings Volume 2327, (1994) https://doi.org/10.1117/12.197597

KEYWORDS: Pulsed laser operation, Excimer lasers, Nd:YAG lasers, Proteins, Temperature metrology, Fiber lasers, Laser applications, Blood, Laser systems engineering, Acoustics

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Proceedings Article | 1 February 1994 Paper

Thermal measurements of flexible hollow waveguides

Israel Gannot, Jacob Dror, Nathan Croitoru, Stephan Schruender, Johannes Tschepe, Thomas Ertl, Gerhard Mueller

Proceedings Volume 2084, (1994) https://doi.org/10.1117/12.167328

KEYWORDS: Temperature metrology, Hollow waveguides, Waveguides, Carbon dioxide lasers, Endoscopes, Metals, Astatine, Laser energy, Thermography, Imaging systems

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Proceedings Article | 1 February 1994 Paper

Er:YAG laser flexible waveguides

Israel Gannot, Jacob Dror, Nathan Croitoru, Stephan Schruender, Johannes Tschepe, Thomas Ertl, Gerhard Mueller

Proceedings Volume 2084, (1994) https://doi.org/10.1117/12.167305

KEYWORDS: Waveguides, Teeth, Dielectrics, Laser energy, Carbon dioxide lasers, Silver, Tissues, Laser development, Reliability, Coating

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Proceedings Article | 21 July 1993 Paper

Hard-tissue ablation with pulsed CO2 lasers

Thomas Ertl, Gerhard Mueller

Proceedings Volume 1880, (1993) https://doi.org/10.1117/12.148321

KEYWORDS: Laser ablation, Carbon dioxide lasers, Laser tissue interaction, Pulsed laser operation, Laser drilling, Laser systems engineering, Microscopes, Er:YAG lasers, Temperature metrology, Natural surfaces

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Proceedings Article | 28 May 1993 Paper

Flexible waveguides for the delivery of high-power Er-YAG laser radiation

Israel Gannot, Stephan Schruender, Thomas Ertl, Johannes Tschepe, Jacob Dror, Gerhard Mueller, Nathan Croitoru

Proceedings Volume 1893, (1993) https://doi.org/10.1117/12.146355

KEYWORDS: Waveguides, Silver, High power lasers, Teeth, Thermography, Laser energy, Carbon dioxide lasers, Infrared radiation, Sensors, YAG lasers

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Showing 5 of 16 publications

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