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Our Practitioners

Dr Andrei Kostka

Dr Andrei Kostka - Dentist at Somervillle Dental Health

Andrei Kostka graduated from the University of Sydney in 1986 with Honours. He started working at the Westmead Dental Clinical School as a Dental Officer, initially with the Department of Community Dentistry, which entailed manning mobile equipment. Andrei was also a Clinical Demonstrator to final year students at the University of Sydney in 1988 and 1989. In 1989 Andrei entered private practice in Liverpool in Sydney.

Andrei joined Somerville Dental Health in 1990 as an associate and became a partner in 1992.

Andrei is a member of the Australian Dental Association and a trained Disaster Victim Identifier (Dental). He enjoys all aspects of general dentistry, with special interests in:

  • oral medicine
  • relative analgesia (nitrous oxide/laughing gas)
  • preventative and forensic dentistry.

In his spare time, Andrei enjoys skiing (and is an instructor – APSI Level!), surfing and rock-climbing. Andrei has maintained an active involvement within the Victorian Ukrainian community.


Dr Darwin Luc

Dr Darwin Luc - Dentist at Somerville Dental Health

Dr Darwin Luc completed his dental degree at the University of Melbourne, graduating with Honours.

Sharing the same philosophy and dedication in care as Andrei and Ross, Darwin joined Somerville Dental Health in 2014 and soon became a partner in 2019 to continue the ongoing commitment and tradition in providing excellent dental care to the whole community.

Darwin is a member of the Australian Dental Association, and is committed to lifelong learning – being an avid attendee of continuing professional development courses in order to stay up to date with the latest advancements in Dentistry. This ensures that his patients receive the best possible evidence-based care available today. In addition to his existing training in orthodontics, Darwin has pursued further and more in-depth post-graduate training and research in Orthodontics and has completed the Graduate Diploma of Orthodontics with Distinction at James Cook University, and the Postgraduate Diploma in Digital Orthodontics. Furthermore, he is currently pursuing a Postgraduate Diploma in Clinical Dentistry (Aesthetic and Restorative Dentistry).

He enjoys practising all aspects of general dentistry, with a special interest in:

  • Cosmetic/Aesthetic Dentistry
  • Implant Dentistry
  • Orthodontics

Darwin understands that seeing the dentist can create significant anxiety for many people, therefore, he strives to create a positive and comfortable environment for every patient he treats, with care that is as gentle and as pain-free as possible. Darwin enjoys spending the time getting to know his patients to understand their needs. He is passionate about working with patients with a comprehensive approach towards achieving their individual oral health goals and attaining a healthy smile for life.

In his spare time, he enjoys spending time with his wife and 2 lovely daughters. They love travelling and sightseeing, whilst experiencing different culinary delights.


Dr Gabrielle Tam

Dr Gabrielle Tam graduated with a Bachelor of Science degree from the University of Melbourne before relocating to Sydney to complete her Doctor of Dental Medicine from the University of Sydney.

Gabrielle grew up in Gippsland, Victoria and since graduation has worked in a combination of private and public clinics in rural New South Wales and Victoria before joining the team at Somerville Dental Health in 2022.

Her calm and friendly personality helps her work with children, teens and patients who are dentally anxious. She understands that a dental clinic can be intimidating, but through gentle care and clear explanations is able to relieve these feelings.

To ensure her patients receive the most up to date treatment, she attends on-going professional development and courses across a variety of areas. Gabrielle is a member of the Australian Dental Association and ensures that her patients are provided with the most up to dental care.

She enjoys all aspects of general dentistry with a particular interest in:

  • Preventive dentistry
  • Paediatrics
  • Cosmetic/Aesthetic dentistry

Outside of dentistry Gabrielle can be found experimenting in the kitchen, travelling the world and attempting to learn new languages when not pampering her dog, Maverick.


Mrs Nelly Troch – Dental Hygiene/Therapist