The Experts below are selected from a list of 11169 Experts worldwide ranked by ideXlab platform
Terry D. Myers - One of the best experts on this subject based on the ideXlab platform.
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Evaluating Dental Lasers: what the clinician should know.
Dental clinics of North America, 2004Co-Authors: Terry D. Myers, John G. SulewskiAbstract:According to the Institute for Advanced Dental Technologies, Dental Lasers have obtained approximately a 6% market penetration in the United States. Unfortunately, a small percentage of doctors have been disappointed with the technology. This article has been written as a guide for clinicians to use before purchasing a Dental Laser. It is the hope of the authors that this material will allow the clinicians to have a better appreciation of this technology and maximize its successful integration into practice.
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Selective ablation of surface enamel caries with a pulsed Nd:YAG Dental Laser
Lasers in surgery and medicine, 2002Co-Authors: David M. Harris, Joel M. White, Harold E. Goodis, C.j. Arcoria, James Simon, William M. Carpenter, Daniel Fried, John Burkart, Michael J. Yessik, Terry D. MyersAbstract:Background and Objective High intensity infrared light from the pulsed Nd:YAG Dental Laser is absorbed by carious enamel and not absorbed by healthy enamel. Consequently, this system has potential for selective removal of surface enamel caries. Safety and efficacy of the clinical procedure was evaluated in two sets of clinical trials at three Dental schools. Selective ablation was evaluated with FTIR spectroscopy. Study Design/Materials and Methods Carious lesions were randomized to drill or Laser treatment. Pulp diagnosis, enamel surface condition, preparations, and restorations were evaluated by blinded evaluators. In Study I, surface caries were removed from 104 third molars scheduled for extraction. One-week post-treatment teeth were evaluated clinically, extracted, and the pulp was examined histologically. In Study II, 90 patients with 462 lesions on 374 teeth were randomized to Laser or drill and followed for 6 months. Results Pulsed Nd:YAG Laser removal of surface enamel caries was demonstrated to be both safe and effective. Caries were removed in all conditions. There were no adverse events and both clinical and histological evaluations of pulp vitality showed no abnormalities. A significantly greater number of preparations in the drill groups vs. Laser groups entered dentin (drill = 11, Laser = 1, P = 0.007). Conclusion The more conservative Laser treatment removed the caries but not the sound enamel below the lesion. The pulsed Nd:YAG Dental Laser was found to be both safe and effective for surface caries removal. Lasers Surg. Med. 30:342–350, 2002. © 2002 Wiley-Liss, Inc.
David M. Harris - One of the best experts on this subject based on the ideXlab platform.
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The Black Bug Myth: Selective photodestruction of pigmented pathogens.
Lasers in surgery and medicine, 2016Co-Authors: David M. Harris, Steven L. Jacques, Richard P. DarveauAbstract:Background and objective It is commonly believed that pigmented pathogens are selectively targeted by Dental Lasers. To test this notion optical diffuse reflection spectroscopy (DRS) was used to obtain absorption spectra for the periodontal pathogens, Porphyromonas gingivalis (Pg) and Prevotella intermedia (Pi). Materials and methods Spectra from 400 to 1,100 nm wavelengths of Pg colonies cultured with different concentrations of hemin were obtained to test the hypothesis that "visual pigmentation" predicts absorption of near-infrared (IR) Dental Laser energy. Ablation threshold at 1,064 nm [1] was measured for the pathogenic fungus, Candida albicans (Ca). Results The hypothesis was demonstrated to be true at 810 nm, it was false at 1,064 nm. Diode Laser (810 nm) efficacy and "depth of kill" is dependent on hemin availability from 400 to about 900 nm. Pg and Pi absorption at 1,064 nm (µa = 7.7 ± 2.6 cm(-1) ) is independent of hemin availability but is determined by another unknown chromophore. Ca is non-pigmented but very sensitive to 1,064 nm irradiation. Conclusions The amount of visual pigmentation does not necessarily predict sensitivity to Dental Laser irradiation. Spectra in visible and near-IR wavelengths demonstrate a large difference in absorption between soft tissue and Pg or Pi. This difference represents a host/pathogen differential sensitivity to Laser irradiation, the basis for selective photoantisepsis. Lasers Surg. Med. 48:706-714, 2016. © 2016 Wiley Periodicals, Inc.
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Selective ablation of surface enamel caries with a pulsed Nd:YAG Dental Laser
Lasers in surgery and medicine, 2002Co-Authors: David M. Harris, Joel M. White, Harold E. Goodis, C.j. Arcoria, James Simon, William M. Carpenter, Daniel Fried, John Burkart, Michael J. Yessik, Terry D. MyersAbstract:Background and Objective High intensity infrared light from the pulsed Nd:YAG Dental Laser is absorbed by carious enamel and not absorbed by healthy enamel. Consequently, this system has potential for selective removal of surface enamel caries. Safety and efficacy of the clinical procedure was evaluated in two sets of clinical trials at three Dental schools. Selective ablation was evaluated with FTIR spectroscopy. Study Design/Materials and Methods Carious lesions were randomized to drill or Laser treatment. Pulp diagnosis, enamel surface condition, preparations, and restorations were evaluated by blinded evaluators. In Study I, surface caries were removed from 104 third molars scheduled for extraction. One-week post-treatment teeth were evaluated clinically, extracted, and the pulp was examined histologically. In Study II, 90 patients with 462 lesions on 374 teeth were randomized to Laser or drill and followed for 6 months. Results Pulsed Nd:YAG Laser removal of surface enamel caries was demonstrated to be both safe and effective. Caries were removed in all conditions. There were no adverse events and both clinical and histological evaluations of pulp vitality showed no abnormalities. A significantly greater number of preparations in the drill groups vs. Laser groups entered dentin (drill = 11, Laser = 1, P = 0.007). Conclusion The more conservative Laser treatment removed the caries but not the sound enamel below the lesion. The pulsed Nd:YAG Dental Laser was found to be both safe and effective for surface caries removal. Lasers Surg. Med. 30:342–350, 2002. © 2002 Wiley-Liss, Inc.
Peter Rechmann - One of the best experts on this subject based on the ideXlab platform.
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Dental Laser research selective ablation of caries calculus and microbial plaque from the idea to the first in vivo investigation
Dental Clinics of North America, 2004Co-Authors: Peter RechmannAbstract:One of the current Dental Laser research tracks is selective ablation, which is the removal of disease while not harming adjacent healthy structures. This article describes the scientific path from the first basic laboratory study of the absorption characteristics of caries to selective ablation of bacteria, microbial plaque, and calculus with a blue Laser and the first in vivo safety studies in dogs. This article is an example of a typical research path for future studies of the uses of Lasers in dentistry.
Y. Matsuura - One of the best experts on this subject based on the ideXlab platform.
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Surface modification of tooth root canal after application of an X-ray opaque waveguide
Applied Physics A, 2004Co-Authors: Tatjana Dostalova, P. Koranda, P. Radina, M. Miyagi, Jan Šulc, M. Barton, Hana Jelínková, Y. MatsuuraAbstract:The interest in endodontic use of Dental Laser systems has been increasing. With the development of thin and flexible delivery systems for various wavelengths, Laser applications in endodontics may become even more desirable. The aim of this study is to check the X-ray opacity of a hollow waveguide and to observe the results after Laser root canal treatment. The root canal systems of 10 molars were treated endodontically by Laser. For the Laser radiation source, an Er:YAG Laser system generating a wavelength of 2940 nm and an Alexandrite Laser system generating a wavelength of 375 nm were used. The hollow waveguide used was checked under X-ray . A root canal surface treated by Laser radiation was analyzed by a scanning electron microscope (SEM). The special hollow glass waveguide used was visible in the root canal system under X-ray imaging. Surface modification of the root canal after Laser treatment was not found. After conventional treatment the root canal was enlarged. The surface was covered with a smear layer. After application of both Laser systems, the smear layer was removed. The resulting canal surface was found to be clean and smooth. Under SEM observation open dentinal tubules were visible. No cracks were present, nor were surface modifications observed.
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surface modification of tooth root canal after application of an x ray opaque waveguide
Applied Physics A, 2004Co-Authors: Tatjana Dostalova, P. Koranda, P. Radina, M. Miyagi, Jan Šulc, M. Barton, Hana Jelínková, Y. MatsuuraAbstract:The interest in endodontic use of Dental Laser systems has been increasing. With the development of thin and flexible delivery systems for various wavelengths, Laser applications in endodontics may become even more desirable. The aim of this study is to check the X-ray opacity of a hollow waveguide and to observe the results after Laser root canal treatment. The root canal systems of 10 molars were treated endodontically by Laser. For the Laser radiation source, an Er:YAG Laser system generating a wavelength of 2940 nm and an Alexandrite Laser system generating a wavelength of 375 nm were used. The hollow waveguide used was checked under X-ray . A root canal surface treated by Laser radiation was analyzed by a scanning electron microscope (SEM). The special hollow glass waveguide used was visible in the root canal system under X-ray imaging.
Robert H. Gregg - One of the best experts on this subject based on the ideXlab platform.
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Endodontic applications of short pulsed FR Nd:YAG Dental Laser: treatment of dystrophic calcification: a clinical trial report
Laser Surgery: Advanced Characterization Therapeutics and Systems III, 1992Co-Authors: Robert H. GreggAbstract:Formation of dystrophic calcification deposits within the root canal of a tooth, have historically been difficult clinical endodontic complications. Presently, removal of such tissue, mineralized through the deposition of calcareous materials in a root canal (a 'calcified canal'), remains resistant to conventional endodontic techniques. The subsequent treatment primarily involves undesirable surgical procedures and/or loss of the tooth. Described in this clinical trial is a technique using free running (RF) pulsed, Nd:YAG Laser energy to ablate hard calcified tissue which obstructed mechanical access of the root canal and root apex--a technique employed after conventional endodontic methods failed. This paper discusses the 'plasma' effect, 'spallation', canal illumination and transillumination using the helium-neon (HeNe) aiming beam. A free running pulsed, FR Nd:YAG Dental Laser was successfully used at 20 pulses per second and 1.75 watts to photovaporize and photodisrupt enough calcified tissue obstruction, to allow a conventional endodontic file to pass the canal blockage, and access the root apex. This clinical trial achieved the immediate, short term objective of endodontic hard tissue removal via photovaporization and photodisruption. The pulsed FR Nd:YAG Dental Laser used as described in this clinical report appears to be a very safe and very effective technique; offers a treatment alternative to traditional therapy that suggests high patient acceptance; and is significantly less stressful for the doctor and staff than traditional treatment options. Long-term, controlled scientific and clinical studies are necessary to establish the safety and efficacy of both the helium-neon energy for visualization and the low- watt pulsed FR Nd:YAG energy for photovaporization and photodisruption of hard calcified tissue within the root canal. Research is especially needed to understand the effects of low- watt, pulsed FR, Nd:YAG Laser on the activity of osteoclasts and odontoclasts and identify risks for developing external and/or internal resorption after intracanal application of pulsed FR Nd:YAG Laser energy.
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Endodontic applications of a short pulsed FR Nd:YAG Dental Laser: photovaporization of extruded pulpal tissue following traumatic fractures of two maxillary central incisors--a clinical trial repor
Laser Surgery: Advanced Characterization Therapeutics and Systems III, 1992Co-Authors: Robert H. GreggAbstract:Historically, many techniques have been attempted in the search for a satisfactory and consistent treatment of inflamed, painful, hyperemic pulpal tissue. Present techniques attempting to achieve profound local anesthesia in such tissue, have not been satisfactory. Local anesthesia techniques acceptable to the patient with painful hyperemic pulpal tissue, has eluded previous technology. The subsequent treatment of hyperemic tissue without sufficient anesthesia primarily involves undesirable invasive mechanical/surgical procedures. Described in this clinical trial is a technique using free running (FR) pulsed, Nd:YAG Laser energy to ablate soft tooth pulpal tissue--a technique employed after conventional endodontic methods failed. A free running pulsed, FR Nd:YAG Dental Laser was successfully used at 20 pulses per second and 1.25 watts to photovaporize endodontic pulpal tissue (pulpectomy) to allow a conventional endodontic file to extirpate the remaining soft tissue remnants and access the root apex. Also described in this paper is the 'hot-tip' effect of contact fiber Laser surgery. This clinical trial achieved the immediate, short term objective of endodontic soft tissue removal via photovaporization, without pain reported by the patient. The pulsed FR Nd:YAG Dental Laser used as described in this clinical report appears to be a very safe and very effective technique; offers a treatment alternative to traditional therapy that suggests high patient acceptance; and is significantly less stressful for the doctor and staff than traditional treatment options. Long-term, controlled scientific and clinical studies are necessary to establish the safety and efficacy of both the helium-neon energy for visualization and the low-watt pulsed FR Nd:YAG energy for photovaporization of soft endodontic pulpal tissue within the root canal. Research is especially needed to understand the effects of a low-watt, pulsed FR, Nd:YAG Laser on the activity of osteoclasts and odontoclasts and identify risks for developing external and/or internal resorption after intracanal application of pulsed FR Nd:YAG Laser energy.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.