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Linda is the second O'Hehir University Graduate to become an instructor. 

More About Linda

Linda is a full-time clinician and the Clinical Director of  In 1982, Linda graduated from the dental hygiene program at the Royal Dental Hospital in London.  She worked in periodontology in London before moving to Toronto in 1990.  Her desire to help patients with xerostomia led her to study this condition and related pathologies. She presents CE courses on this and other topics.   

Linda has now added Instructor to her resume, teaching several classes for O’Hehir University.

Dean of Academics

Tim is a UK-based Dental Hygienist with clinical experience in several countries, a popular speaker, writer, innovator and a Fellow of the Higher Education Academy.


More about Tim

Tim served in the Royal Air Force, beginning his career as a dental assistant and retiring from the military 22 years later as dental hygienist, working alongside the Clinical Advisor in Periodontology and mentoring military Dental Hygienists. Whilst in the military, he gained invaluable experience, living and practicing in UK, Falkland Islands, Hong Kong, Cyprus, New Zealand, Germany and Holland.

This was followed by three years at a UK Specialist Periodontal Practice working alongside top European Periodontists Dr Jose Zurdo and Dr Cristina Romao. In 2007 Tim qualified with the Faculty of General Dental Practice (UK) as a Practice Appraiser, qualifying him to clinically appraise all UK based dental clinicians and dental offices.

His time now is split between practicing as a hygienist, speaking, writing, teaching and consulting. He sits on the editorial board of Dental Hygiene and Therapy and is on the judging panel of the UK Dentistry Awards. In 2011 he completed a post-graduate mentoring qualification and with Philips helped set up the first privately funded UK Mentoring Program for newly graduated dental hygienists and therapists.

In 2012 Tim graduated as a Teacher from the University of Bedfordshire. In 2015 he graduated with a Masters in Medical Education receiving a Commendation from the University of Bedfordshire. His final thesis utilised O’Hehir University Faculty, Graduates and Students to qualitatively research the optimisation of teaching and learning within a virtual learning environment.

Tim is an active member of the British Society of Dental Hygiene & Therapy, The Faculty of General Dental Practice (UK) and in 2012 became the first non-US based Dental Hygienist to be invited to the American Academy of Dental Hygiene.

Founder and President

Besides clinical dental hygiene practice and several university faculty positions over four decades as an RDH, Trisha is an international speaker, author, instrument designer, inventor.

More about Trisha

Trisha attended the University of Minnesota where she received degrees in Dental Hygiene and Higher Education. Four decades as a dental hygienist have included private practice in the United States and Zurich, Switzerland as well as faculty positions at the Universities of Minnesota, Washington, Arizona and Louisville.

She pioneered the position of Periodontal Therapist in Arizona and worked for several years teaching local anesthesia and providing local anesthesia in an oral surgery practice. In addition to extensive clinical practice experience, she is an instrument designer, international lecturer, and is also on the Board of Directors of AD World Health, a foundation dedicated to bringing healthcare to the underserved. Previously, Trisha was the Editorial Director of and President of the Perio Reports Press.

Trisha authored more 26 years of Perio Reports research summaries, hundreds of articles bridging the gap between science and practice, the textbook Compendium of Current Research, the cartoon book The Toothpaste Secret and contributed to the text book Comprehensive Dental Hygiene Care, by Irene Woodall. Her articles have appeared in Hygienetown Magazine, RDH, JDH, JPH, Access, JDR and JADA.

Her awards include the 1991 Distinguished Alumni Award from the University of Minnesota, School of Dental Hygiene and the Warner-Lambert/ADHA Excellence in Dental Hygiene Award in 1992. Trisha currently lives and works in Phoenix, Arizona where she is the Past-President of the Arizona State Dental Hygienists' Association.


Dabney is the first instructor hired from our graduates to become an instructor.

More About Dabney

Dabney is a full-time clinician in a busy general practice. She is also passionate about health and wellness and works with her patients and the community to bring awareness of the possibilities to live a better life through lifestyle choices and foods.

Dabney began her dental career as a front office assistant. Her love for the dental field led her to become an assistant, then four years later, she began her dental hygiene career when she entered the dental hygiene program at the local community college. After graduation, she knew she wanted more knowledge. She started a local study club with other recent graduates to discuss problems and successes in the clinical setting.

As a life-long learner, Dabney had plans to earn her BS Degree even while in hygiene school. She fulfilled that dream when she graduated from O’Hehir University in 2015. She submitted her action research paper titled, “Will my patients notice a difference in their oral health and energy levels if I ask them to give up added sugars for one week?”

Dabney has now added Instructor to her resume, teaching several classes for O’Hehir University.