Professional and experienced clinicans

Meet the team

We are a cohesive group of professionals who love what we do.

Our Practice

Dentistry on Merivale is a long-standing practice, most recently operated by Dr. Michael Olmstead, an exceptionally skilled practitioner with an excellent reputation across New Zealand. Once Mike made the decision to (semi) retire he set out to find a clinician with the same practice philosophy who would be keen to carry on in this very successful practice.

In February 2010 the practice was taken over by Dr. David Walsh, a dentist with whom Dr. Olsmstead had worked side by side with for 2 years when they each first arrived in NZ several years ago. With very similar training, experience, and professional belief systems, the transition was seamless and Michael and David remain good friends and professional colleagues.

About Us

We are a cohesive group of professionals who love what we do. We strive every work day to provide the best possible care for our clients as well as for each other.

We will always welcome new and established patients to our practice and look forward to seeing you.


Dr. David A. Walsh, BSc DMD

Member New Zealand Dental Association
Member New Zealand Academy of Cosmetic Dentistry
Member Australasian Osseointegration Society

David is a 1987 graduate of the University of Manitoba, Canada. Since graduation, he has practiced full-time, with a special interest in utilizing the latest technology and techniques to provide the best possible cosmetic and comprehensive restorative dental care. He believes in amalgam free dentistry and all treatment is centered on his patient’s overall health and well-being.

In search of warmer climes, he immigrated to this lovely country with his young family in 2003 and absolutely loves living here. Now well established in NZ, both professionally and personally, David looks forward to many years of providing excellent treatment to those that entrust their dental care to him.


Shona Ferguson (DipDentHyg)

Shona arrived from Scotland in 2005, and has worked with David in this country for most of that time.

With her unparalleled energy and enthusiasm, not to mention her 15 plus years experience as a hygienist, she is a truly exceptional addition to the practice. Few of those that know her are willing to see anyone else for their gum care and she has quickly earned a well-deserved reputation as one of the best in her profession.

Lynnette Adler (DipDentHyg)

is the most recent addition to our professional team. Lyn ahs 20 years experience in dentistry. Since graduating in 2003 (Otago) she has been practicing mainly in Nelson until moving to Christchurch in 2013. Lyn is highly passionate about oral health and the provision of the best possible care to her clients in a caring and supportive environment.

Lyn is held in very high esteem amongst her colleagues and we feel very privileged to have her a s part of our team.

Clinical manager/chairside assistants

Leah Roberts

Leah is the newest member of the clinical team, having come on board following the return to Canada of existing dental assistant Tracy earlier in the year.

As full-time clinical assistant Leah will help you feel relaxed and comfortable during your treatment. Leah also has several years experience in the dental field and is certainly passionate about her role in helping to see that the best possible care is provided to our clients.

Lyn is held in very high esteem amongst her colleagues and we feel very privileged to have her as part of our team.

Herbal Medicine

Sandra Walsh, BSc BA DipClinHerbMed

As well as being David’s partner, Sandra helps out in the practice in two (other) capacities. She takes over reception duties when Wendy or Leah are away, and also practices clinical herbal medicine from within the practice. In this role, she offers professional guidance to clients of the practice who are keen to pursue the best possible herbal, dietary and nutritional pathway to oral and general health.

Sandra is passionate about her profession and has helped many clients find their way through the sometimes confusing world of natural medicine. With three years of dental school in her educational history as well as her other accomplishments Sandra is a perfect fit in the practice.

Front desk co-ordinators

Wendy Willets

Wendy is the lady with the smile that will greet you at the door as well as on the phone as she welcomes our clients to the practice every day. She too has been involved in dental practice in various roles for over 30 years and puts that knowledge to good use as she manages the practical side of our patents’ treatment needs.

Wendy has worked with David and Shona for the last several years and is always happy to answer any questions or help in any way she can. She is a remarkable person and the team is lucky to have her in her vital role here.