Executive biographies


Stephen Abrams, DDS

President & Founder

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Stephen Abrams

President & Founder

Stephen Abrams is a general dental practitioner with over 37 years of clinical experience. Upon graduation from the University of Toronto, Faculty of Dentistry in 1980 Dr. Abrams established a group practice in Toronto Canada which has grown to involve both general dentists and dental specialists.

Dr. Abrams has also been active within the profession. He has honorary fellowships in a number of dental societies including Pierre Fauchard Academy, Academy of Dentistry International, American College of Dentists and the International College of Dentists. He is a member of Alpha Omega Dental Fraternity.

He has been very active in the Ontario Dental Association, chairing their Dental Benefits Committee for the last seventeen years, negotiating with the provincial government and local municipalities across Ontario on various government sponsored dental programs. He has dealt with issues of access to oral health care, design of dental programs and the value of preventive dentistry while leading this ODA Committee. In 2008, he organized a symposium at the International Association for Dental Research entitled 'Designing Dental Programs for High Risk Children'. The outcomes from this symposium have been incorporated into submissions made to the Ontario Government on designing dental programs.

He was one of the founding board members of ACCERTA Claim Corporation, a dental and pharmacy claims management company. His role on the board was to look at how to design, administer and implement health programs.

In 1999, Dr. Abrams began working on a non-invasive laser based device for the detection and monitoring of caries and erosion with a professor University of Toronto Faculty of Mechanical Engineering. In 2006, he founded Quantum Dental Technologies to introduce The Canary System to the dental profession. The company currently has 8 patents on the technology and its various applications.

He is a senior member of the European Organization for Caries Research (ORCA) and the International Association for Dental Research where he has presented a number of papers on the detection of caries using The Canary System. Dr. Abrams has published over 150 papers and two book chapters in various international publications on topics ranging from early caries detection, caries prevention, removable dentures, design of dental programs and restorative dentistry. He has also given full day courses on the detection and management of dental caries. In November 2014, the University of Western Ontario invited him to deliver the Feasby Memorial Lecture on the caries management.

In March 2014, he organized and chaired a symposium at the joint Canadian and American Association for Dental Research Meeting on the safety and efficacy of community water fluoridation. This was part of the process to engage the research community in dealing with this issue and provide the dental profession with the latest research on water fluoridation. The symposium paper is available on the OASIS CDA web site.

In 1992, he was awarded Canada's 125 Commemorative Medal for Community Service. In 2002, Dr. Abrams was awarded the Barnabus Day Award from the Ontario Dental Association for 20 years of distinguished service to the dental profession. In 2014 he was awarded the Alpha Omega Humanitarian Award for his work on behalf of the dental profession. In October 2017 he was awarded SNAPD Award for his service to the local community.

Andreas Mandelis, PhD

Chief Technology Officer & Founder

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Andreas Mandelis

Chief Technology & Founder

Andreas Mandelis is a Full Professor of Mechanical and Industrial Engineering; Electrical and Computer Engineering; and the Institute of Biomaterials and Biomedical Engineering, University of Toronto. He is the CTO of Quantum Dental Technologies, Inc., Toronto, ON, Canada. He received his BS degree (Magna cum Laude) in physics from Yale University in 1974, and MA, MSE, and Ph.D. degrees from the Applied Physics and Materials Laboratory, Department of Mechanical and Aerospace Engineering, Princeton University. He joined the electronics industry in the silicon Process R&D as a Member of Scientific Staff, Bell Northern Research Labs, Ottawa, in 1980-1981. He is the Director of the Center for Advanced Diffusion-Wave Technologies (CADIFT) at the University of Toronto. He is the author and co-author of more than 310 scientific papers in refereed journals and 174 scientific and technical proceedings papers; he is the author of the book Diffusion-Wave Fields: Mathematical Methods and Green Functions, published by Springer-Verlag (2001) and the co-author of the book Physics, Chemistry and Technology of Solid State Gas Sensor Devices published by Academic Press (1993). He is the Editor-in-Chief of the book series Progress in Photothermal and Photoacoustic Science and Technology, published by the Society for Optical Engineering (SPIE). He has also been a guest editor of a number of special issues in the area of photoacoustic/photothermal and generally, diffusion-wave phenomena. He is an Associate Editor of the AIP Journals Review of Scientific Instruments, Journal of Applied Physics and of the Springer International Journal of Thermophysics. He is and/or has been on the editorial or advisory boards of the of the SPIE Journal of Biomedical Optics, Journal of Applied Physics, Applied Physics Letters, International Journal of Thermophysics, The International Journal of NDT&E, Analytical Sciences (J. Chem. Soc. Japan), ), Quantitative InfraRed Thermography (QIRT) Journal (Lavoisier Press, France), and the (on-line journal) Diffusion Fundamentals. He is Consulting Editor – New Products of the AIP flagship magazine Physics Today. He has several inventions, 25 patents and patents pending in the area of dental laser diagnostics (biothermophotonics, photothermal tomographic imaging, signal processing and measurement, hydrogen sensors, semiconductor laser infrared photothermal radiometry, laser photo-carrier radiometry and laser biophotoacoustic tissue imaging.

He is a Fellow of the American Physical Society, a Fellow of the SPIE, and a Member of the ASME K7 Committee on Thermophysics. He has been on the Executive and Leadership of the APS Instrument and Measurement Science Topical Group and is the Founder and Chair of the Division of Instrumentation and Measurement Physics (DIMP) of the Canadian Association of Physicists (CAP). He is the Co-founder and President of the International Photoacoustic and Photothermal Association (IPPA), a scientific prize awarding society with headquarters in Toronto, CA, and Providence, USA. In 2002 he was awarded the Alexander von Humboldt Award (Germany) “in recognition of his past accomplishments in research and teaching”. In 2004 he was the recipient of the New Pioneers Award in Science and Technology of Skills for Change (City of Toronto) and in 2007 he was selected among the New Pioeneers for a special 15th anniversary awards celebration.

In 2006 he was elected Fellow in the Academy of Sciences of The Royal Society of Canada. The brief citation reads: “Andreas Mandelis is an internationally renowned expert in the development, shaping and applications of diffusion-wave sciences and associated technologies. He pioneered and developed numerous techniques and devices that are now used worldwide for materials research, industrial process quality control, dental caries diagnosis and soft tissue imaging”.

Culminating his work on the foundations of the field of diffusion waves in matter, his scientific and technical research interests span all aspects of the physics, mathematics, instrumental implementation and experimental applications of novel laser-based diffusion-wave analytical inspection and monitoring techniques, high-precision measurement methodologies, environmental sensor device development, analytical, non-destructive and spectroscopic methodologies, signal processing physics and measurement science, and imaging techniques for industrial and health sector applications. These interests are focused on fundamental physical processes as they impact instrumentation science and signal generation in the fields of thermophysics, non-radiative and radiative phenomena in electronic, optical and biomedical materials, thermal-wave and diffusion-wave phenomena in electronic and photonic media. Current interests include building the foundations of biothermophotonic and biophotoacoustic transport phenomena and frequency-domain instrumentation for imaging in hard (dental) and soft tissues.

On April 2007 he became the 2007 (inaugural) recipient of the Discovery Award in Science and Engineering, one of the Ontario Premier’s Innovation Awards. In 2008 he was awarded a Canada Research Chair (Tier 1) in Diffusion-Wave Sciences and Technologies. In 2008 he became the recipient of the ASME 2009 Yeram Touloukian Award (and Medal) in Thermophysics. In 2009 he was awarded the Senior Prize of the International Photoacoustic and Photothermal Association and the Canadian Association of Physicists (CAP) Medal for Outstanding Achievement in Industrial and Applied Physics. In 2010 he was awarded a Killam Research Fellowship from the Canada Council for the Arts. He is the recipient of the American Physical Society’s 2012 Joseph F. Keithley Award for Advances in Measurement Science. The brief citation reads: "For seminal contributions to the development of new experimental techniques based on photothermal science, and the application of these techniques to a variety of real-world problems."

Jennifer Rooney, BSDH

National Sales Manager

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Jennifer Rooney, BSDH

National Sales Manager

Jennifer is a registered dental hygienist with over 23 years of clinical experience. Jennifer joined QDT in 2013 providing clinical consultation and training for customers. Her position quickly evolved to include Midwest Sales Manager and most recently, National Sales Manager.

Jennifer received a Bachelor of Science in Dental Hygiene from University of Minnesota - School of Dentistry (1993). She began work in private practice focused on periodontal laser therapy and the promotion of total body health. The clinical practice specialized in methods to enhance and improve smiles using full mouth reconstruction and implant therapy. Jennifer was appointed Assistant Clinical Professor at the University of Minnesota - Division of Dental Hygiene (1996-2001) and then became a guest lecturer on aesthetic dentistry and smile design (2002-2010).

Jennifer is passionate about improving lives through advances in health care. She is a founding member of the American Academy of Oral Systemic Health (AAOSH) and participates in the Minnesota Mission of Mercy, which provides free dental services to underserved communities in Minnesota.

Koneswaran S. Sivagurunathan, PhD

Vice President,
Product Development

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Koneswaran S. Sivagurunathan

Vice President, Product Development

Konesh joined QDT in 2007 as a research and development scientist responsible for the software development and instrumentation of The Canary System™. Konesh also works as the Study Coordinator for the investigational studies critical for the product development of The Canary System™.

Konesh received a BSc at the University of Jaffna, Sri Lanka (1996), and a PhD in Physics at Northeastern University, Boston, USA (2004). During his doctoral studies, Konesh employed thermal noise as a tool to probe nanometer scale dynamics of polymers. Between 2004-2007, Konesh was a Post Doctoral Research Fellow at the Centre for Molecular Imaging, Institute of Biomaterials and Biomedical Engineering at the University of Toronto. During this fellowship, Konesh studied nanometer scale dynamics of model lipid bilayers and protein-membrane interactions. In addition to his role at QDT, Konesh has an adjunct Research Associate position (2009-2010) at the Center for Advanced Diffusion-Wave Technology (CADIFT) in the Mechanical and Industrial Engineering Department at the University of Toronto. At CADIFT, he has been involved with software development and instrumentation of various biomedical and industrial applications of photothermal radiometry such as dental caries detection, blood glucose measurements and industrial steel hardness case depth inspections.