Stratford Dental
A Great Dentist

Meet the Team at Stratford Dental

Our practice is about:

  • Positivity
  • Calming And Accommodating
  • Modern Technology, Equipment And Techniques
  • Modern Surroundings
  • Welcoming Staff

We understand how important your teeth are to your health, your appearance and your self-confidence. In our practice there are no one-size-fits-all solutions; our team of dental professionals spend time with each patient finding out what matters to you and customising treatments to meet your individual needs.

Our team genuinely love dentistry, interacting with our patients, and making a difference to the way you look and feel.

We are dedicated to providing healthy, aesthetic smiles and we focus on improving the quality, function, and appearance of your teeth that lasts a lifetime.
We aim to meet every patient's needs by offering a variety of general and advanced dental treatments.
We are a warm and friendly team and we ensure that you are comfortable, pain free and safe.
Financial plans, special appointments and treatment options are individually customised for you.


Dr Mary Anne Costelloe, BDS Dip.Clin


Mary Anne has owned this practice for 25 years after purchasing it from Dr Kerry Hamilton/Dr David Haszard after working for Dentists in New Plymouth for 2 years. She has a Clinical Diploma is Paediatric Dentistry and prides herself providing an environment that is very child and Adult friendly, and wishes her patients to understand the treatments offered to them.  Mary Anne has 4 adult children and 3 grandchildren

Dr Yinan (Nana) Zhang, Bachelor of Dental Surgery with Honours, Otago


Nana grew up in the Mighty Manawatu and completed her Bachelor of Dental surgery in Dunedin and worked back home as a dentist before the big move to Taranaki. She enjoys connecting with the people of Stratford, as the town reminds her of Feilding, where her family lives.

Nana is passionate about patient centred care and minimal invasive dentistry, she is always here to listen and workout a flexible plan tailored to suit every patient and their needs. Nana always focuses on increasing oral health awareness and teaching patients to look after themselves and their family. 

In her spare time Nana likes to look after the animals on her parents' lifestyle block - her border collie Conan, chickens and lambs. She also enjoys playing the guitar, drawing and road trips for skiing and visiting friends. Looking for antiques and vintage collectables is a hobby which started with a Brownie film camera, Nana loves going to markets and shops to eye out these hidden treasures.


Ms Karen Whittle, NZQA Certificate


Karen has been employed with us since June 2001.  She is our Head Chairside Assistant working 4 days a week.  Before coming to work with us Karen was formally employed with another local dentist before his retirement.  She has 4 grown children and is also a grandmother to 8 grandchildren.

Shey Kowalewski

Dental Assistant

Shey is our second Chairside Assistant, working with both Nana and MaryAnne.  Shey was a chairside assistant before she started her family and has now returned to the dental industry as her children are all in their teens.

Ms Andrea Bosson-Hart

Office Manager

Andrea is in charge of all managerial matters within our practice, she has been with us for 16yrs and has 2 young children.

Ms Lisa Hall, NZQA Certificate


Lisa has been employed with us since 1986 initially as a Chairside Assistant.

She has 3 teenage children.

She works 4 days as our receptionist responsible for the day to day running of the office, and lab work.

Jo-Anne Corlett


Jo is employed with us to help with the extra sterilisation requirements we need to meet due to Covid-19.  She has been a staff member of the practice over the years while covering for maternity leave, holidays or sick leave.  She has skills in all departments and you will most likely see her either in the surgery or in reception.

A Healthy smile is just a click away.