Northern Beaches Dental Group

Meet the Team at Northern Beaches Dental Group

The team at Northern Beaches Dental Group strives to provide highly personalised dental care. With over 40 years of combined dental experience, our multilingual dentists offer a complete range of dental services. They enjoy getting to know their patients, and  consider them part of their extended dental family.

We look forward to meeting you in person and  can't wait to welcome you to our Dee Why, NSW dental surgery.

If you would like to learn a little about us before your first scheduled booking, you can browse through our team's biographies, which are listed below. 

Dr Livia De Haan, Bachelor of Dental Surgery, Paediatric Dentistry and Orthodontics

Principal Dentist

Dr. Livia qualified as a Dentist at the University of Rio de Janeiro, Brazil, where she has done further postgraduate studies with a double degree in Pediatric Dentistry and Orthodontics. After spending 7 years working in her own private practice in Brazil,  she moved to Australia in 2004.  

Dr Livia is passionate about preventative dentistry and early intervention in Orthodontics, as well as adult Orthodontics and Invisalign. She is committed to ensuring that all patients get the highest possible care in the most fun and gentle manner. 

Dr. Livia also has a special interest in Facial Aesthetic / Injectables.


  • American Association of Orthodontics
  • Brazilian Society of Orthodontics
  • World Federation of Orthodontics 
  • Australian Association of Facial Aesthetics 

Outside of Dentistry, Livia loves to spend her time with her 2 children, family and friends.

She is an avid reader and enjoys playing tennis, bush walking and the beach where she can often be found  playing "frescobol ".

Naomi Preedy


Naomi completed a Bachelor of Oral Health at the University of Newcastle in 2010 however started her passion in the field well before offering over 15 years dental experience. 

As a hygienist her main focus is to make patients feel comfortable, well informed and confident throughout their treatments. She finds her role very rewarding and loves working with adults and children from all walks of life. She has a passion for the overall well-being of her patients and strives to provide the best care for their needs.

Growing up close to the beach and nature, she enjoys long hikes and keeping fit outdoors. 

Dr Anastasiya Valiushka

Associate Dentist

Dr. Anastasiya is a fourth-generation Dentist in her family, and she feels most at home when she is at work. She grew up in Belarus, moved to Canada as a teenager, and now feels fortunate to call Sydney her home. With her warm and genuine personality, it is easy to forget that you are in a dentist’s office, and it is most important for her that patients feel comfortable in her care. 

Dr. Anastasiya is dedicated to establishing and promoting oral health, and she is thorough and comprehensive in treatment planning for her patients. Dr. Anastasiya will work through and explain all available options to you, to assure your ultimate satisfaction. She is passionate about all aspects of the dental field: from urgent dental care to restorative and cosmetic work.

In her spare time, Dr. Anastasiya loves spending time with her friends, enjoying weekends at the beach, and promises to one day finally take those surfing lessons she always wanted to.  She is a big coffee fan, food enthusiast and most importantly, a huge animal lover. 

Dr Trishin Seetharam, BDSc (UWA), MClin Implants (LLU - Los Angeles)


Dr Trishin Seetharam


MClin Implants (LLU - Los Angeles)

Dr Trishin graduated with a Bachelors in Dental Surgery from the University of Western Australia in 2012. He has since completed multiple post-graduate courses from around the world, including Europe, England, and America. Dr Trishin was born in South Africa and grew up in New Zealand and Australia. In Perth, he worked and helped mentor other dentists at one of Australia’s largest dental practices, before more recently returning to Sydney. Dr Trishin has an eye for detail and a natural creative flare which compliments his interest in cosmetic treatments such as porcelain veneers and Invisalign orthodontics. He is highly skilled in performing surgical procedures, including replacing missing teeth with dental implants and complex wisdom teeth removals.

Dr Trishin provides a relaxed and gentle approach for his patients whilst offering cutting edge techniques and the latest technologies. He believes in providing his patient the best of care at a holistic level by incorporating metal-free, biocompatible and aesthetic solutions for their dental needs.

In 2017, Dr Trishin competed the gIDE Master Clinician Program in Implant Dentistry at Loma Linda University in Los Angeles, California. He has also completed the All-On-4 implant training program with world leaders Dr Armando Lopes & Dr Ana Ferro from the MALO Clinic in Portugal.

Every two years he attends the Asia-Pacific Invisalign summit to keep abreast with the latest advances in orthodontic treatments. Dr Trishin has further developed his expertise in enhancing the overall smile by completing the ORIS Medical’s facial injectables program at the Royal College of General Practitioners in London.

Outside of dentistry, Dr Trishin can be found enjoying the great outdoors, at the beach or trying out the newest local restaurant. He likes to keep fit whether that be at the gym, hiking or running around with his little nephew. He is an avid traveller, aspiring photographer and would be the first person to sign up to a wine tour or camping trip.

Contact Us to Arrange a Booking
02 80773100 |
Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.
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