Dr. Robert Gregg Profile

Dr. Robert Gregg

DDS at Robert H Gregg DDS Inc

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Author

Publications (5)

Proceedings Article | 18 February 2014 Paper

Pulsed Nd:YAG laser treatment for failing dental implants due to peri-implantitis

Dawn Nicholson, Kris Blodgett, Charles Braga, Larry Finkbeiner, Jeanne Fourrier, John George, Robert Gregg, Allen Honigman, Bruce Houser, William Lamas, Neal Lehrman, Eric Linden, Delwin McCarthy, Tom McCawley, Randy McCormick, Ed Marcus, Kirk Noraian, Peter Rubelman, Maurice Salama, Steven Saunders, Brandon Seamons, David Thein, Michael Toms, George Vassos, David Harris

Proceedings Volume 8929, 89290H (2014) https://doi.org/10.1117/12.2041037

KEYWORDS: Bone, Radiography, Teeth, Nd:YAG lasers, Tissues, Laser dentistry, Laser stabilization, Pathogens, Laser therapeutics, Clinical trials

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Proceedings Article | 18 February 2014 Paper

Change in clinical indices following laser or scalpel treatment for periodontitis: A split-mouth, randomized, multi-center trial

David Harris, Dawn Nicholson, Delwin McCarthy, Raymond Yukna, Mark Reynolds, Henry Greenwell, James Finley, Thomas McCawley, Pinelopi Xenoudi, Robert Gregg

Proceedings Volume 8929, 89290G (2014) https://doi.org/10.1117/12.2040823

KEYWORDS: Teeth, Laser dentistry, Surgery, Tissues, Critical dimension metrology, Bone, Mouth, Wound healing, Ultrasonics, Statistical analysis

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Proceedings Article | 3 June 2002 Paper

Sulcular debridement with pulsed Nd:YAG

David Harris, Robert Gregg, Delwin McCarthy, Leigh Colby, Lloyd Tilt

Proceedings Volume 4610, (2002) https://doi.org/10.1117/12.469328

KEYWORDS: Laser therapeutics, Laser dentistry, Pulsed laser operation, Clinical trials, Nd:YAG lasers, Bone, Radiography, Teeth, Laser tissue interaction, Statistical analysis

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Proceedings Article | 1 June 1992 Paper

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

Robert Gregg

Proceedings Volume 1643, (1992) https://doi.org/10.1117/12.137375

KEYWORDS: Nd:YAG lasers, Laser tissue interaction, Tissues, Neodymium, Teeth, Pulsed laser operation, Laser dentistry, Laser therapeutics, YAG lasers, Clinical trials

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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.

Proceedings Article | 1 June 1992 Paper

Endodontic applications of short pulsed FR Nd:YAG dental laser: treatment of dystrophic calcification: a clinical trial report

Robert Gregg

Proceedings Volume 1643, (1992) https://doi.org/10.1117/12.137376

KEYWORDS: Laser tissue interaction, Neodymium, Nd:YAG lasers, Pulsed laser operation, Teeth, Laser therapeutics, Laser dentistry, Clinical trials, Tissues, YAG lasers

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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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