René Franzen

ORCID: 0000-0003-3155-4260
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About
Contact & Profiles
Research Areas
  • Laser Applications in Dentistry and Medicine
  • Endodontics and Root Canal Treatments
  • Dental Anxiety and Anesthesia Techniques
  • Dental materials and restorations
  • Dental Erosion and Treatment
  • Laser Design and Applications
  • Dental Implant Techniques and Outcomes
  • Oral microbiology and periodontitis research
  • Dental Radiography and Imaging
  • Laser Material Processing Techniques
  • Solid State Laser Technologies
  • Occupational health in dentistry
  • Advanced Fiber Laser Technologies
  • Periodontal Regeneration and Treatments
  • Astronomical Observations and Instrumentation
  • Rocket and propulsion systems research
  • Oral and Maxillofacial Pathology
  • Ocular and Laser Science Research
  • Dental Research and COVID-19
  • Housing, Finance, and Neoliberalism
  • Oral Health Pathology and Treatment
  • Temporomandibular Joint Disorders
  • Astro and Planetary Science
  • Pain Management and Opioid Use
  • Laser-induced spectroscopy and plasma

RWTH Aachen University
2015-2024

Sigmund Freud University Vienna
2024

Universitätsklinikum Aachen
2012-2023

King County Department of Community and Human Services
2016

Australian National University
2016

Heinrich Heine University Düsseldorf
2002

The aim of this in vitro study was to investigate the antibacterial depth effect continuous wave laser irradiation with a wavelength 980 nm root canal wall dentin bovine teeth.The long-term success an endodontic therapy often fails due remaining bacteria or tubules, which cannot be sufficiently eliminated through classical preparation technique nor rinsing solutions.A total 102 slices different thicknesses (100, 300 and 500 micro m) were prepared. samples inoculated from one side 5 L...

10.1089/104454704773660912 article EN Journal of Clinical Laser Medicine & Surgery 2004-02-01

The theory of the ablation dental hard tissue with erbium lasers is based on a process thermomechanical interaction, which explained by absorption radiation in water component tissue. abrupt evaporation cause fragments being blasted out tooth structure. aim this study to examine effect contained tissues efficiency ablation. 192 specimens both bovine enamel and dentin are irradiated an Er:YAG Er,Cr:YSGG laser. Half dehydrated beforehand. Irradiation carried subgroups: without spray at flow...

10.1117/1.2204028 article EN Journal of Biomedical Optics 2006-01-01

Although CO<sub>2</sub> laser irradiation can decrease enamel demineralisation, it has still not been clarified which wavelength and conditions represent the optimum parameters for application as preventive treatment. The aim of present explorative study was to find low-fluence (λ = 10.6 μm) resulting in a maximum caries-preventive effect with least thermal damage. Different were systematically evaluated 3 steps. In first experiment, 5 fluences 0.1, 0.3, 0.4, 0.5 0.6...

10.1159/000217858 article EN Caries Research 2009-01-01

Background In the current cosmetics industry, bleaching is often associated with lasers. However, such treatment also harbors risks. Tooth death observed at pulpal temperature increases ≥5.6 °C. Therefore, it seems important to investigate effects of using different The aim this study was determine laser parameters during by modeling a realistic environment and compare recording thermocouple thermal camera. authors assumed that there are settings for lasers used which <5.6 °C recordings...

10.3390/jcm13082301 article EN Journal of Clinical Medicine 2024-04-16

The aim of this study was to evaluate the effectiveness a radial firing tip an Er,Cr:YSGG laser as adjunct nonsurgical periodontal treatment.Twelve patients with chronic or aggressive periodontitis were treated by conventional treatment using ultrasonic devices and hand instruments and, additionally, in two quadrants laser. A new (RFPT 14-5, Biolase) used 1.5 W, 30 Hz, 11% air, 20% water, pulse duration 140 μs. Microbiological smears taken before treatment, one day after lasing, three six...

10.1155/2015/450258 article EN cc-by The Scientific World JOURNAL 2015-01-01

The purpose of this study was to evaluate the effects dual wavelength (2780 nm Er,Cr:YSGG and 940 diode) laser with radial firing tip (RFT) on external root surface sub-surfaces, in terms temperature changes during laser-assisted canal treatment.A significant factor that may limit use lasers endodontics is possible thermal injury tooth supporting structures.A total 50 sound single-rooted extracted teeth were divided randomly into two groups (n = 25). Group A, irradiated at 1.06 W, Hz, μs a...

10.1089/pho.2015.3907 article EN Photomedicine and Laser Surgery 2015-09-01

The aim of this in vitro study was to evaluate the efficiency diode laser-activated bleaching systems for color change teeth. 75 extracted teeth were studied five different protocols. Group 1: laser 445 nm, 320 µm fiber, 0.5W, continuous wave mode, dose 53 J/cm

10.1007/s10266-023-00886-x article EN cc-by Odontology 2024-02-17

Objective: The aim of this in vitro study was to investigate the antibacterial effect dual wavelength (2780 nm Er,Cr:YSGG and 940 diode) laser elimination Enterococcus faecalis comparison with a 2780 alone. Background data: Various wavelengths have been introduced as an adjunct root canal treatment because laser's bactericidal effect. Materials methods: Seventy- five slices dentin thicknesses 300, 500, 1000 μm (n = 25 each) obtained from caries-free bovine teeth were inoculated 1 μL E....

10.1089/pho.2015.3960 article EN Photomedicine and Laser Surgery 2015-12-18

SOXS (Son Of X-Shooter) will be a unique spectroscopic facility for the ESO-NTT 3.5-m telescope in La Silla (Chile), able to cover optical/NIR band (350-1750 nm). The design foresees high-efficiency spectrograph with resolutionslit product of ~4,500, capable simultaneously observing complete spectral range 350 - 1750 nm good sensitivity, light imaging capabilities visible band. This paper outlines status project.

10.1117/12.2231866 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2016-08-09
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