Smilegroup’s highly trained and experienced team of doctors and support staff are dedicated to delivering excellence in children’s dentistry in a safe, positive and professional environment.

Dr. Katherine Ngu, Smilegroup Sydney

Dr Katherine Ngu

BDS(Syd), MDSc(Syd), FRACDS, MRACDS(Paed) Paediatric Dentist

Dr Katherine obtained her Bachelor of Dental Surgery and Master of Dental Science in Paediatric Dentistry at the University of Sydney and is also a Fellow of the Royal Australasian College of Dental Surgeons (FRACDS) and is a Member of the Special Field of Paediatric Dentistry of the College. She has worked in both public and private practice for over 20 years and has held specialist roles at the Sydney Dental Hospital and Westmead Hospital. She is a member of Australian Dental Association, Australasian Academy of Paediatric Dentistry, American Academy of Pediatric Dentistry, Australian and New Zealand Society of Paediatric Dentistry and the Royal Australasian College of Dental Surgeons.

Dr Katherine has a clear love for what she does and for the children she works with, this is reflected through her warm, patient and professional manner. At home, she enjoys reading with her daughter and going out for long bush walks with the entire family.

Dr Connie Tao

 MB, BS(Hons.)(Syd), FANZCA, 2004 Anaesthetist

Dr Connie Tao graduated from the University of Sydney in 1996 with First Class Honours at graduation and the Zammit Award for Final Year. She is currently a VMO at Westmead & Concord Hospitals, Westmead Private, SAN and Macquarie Hospitals.

Dr Tao is currently a Clinical Tutor at the SAN Clinical School (University of Sydney). She has postgraduate qualifications including: Postgraduate Diploma in Clinical Echocardiography (University of Melbourne) and Master of Medicine (Perioperative Medicine) at Monash University. Her areas of special interest are paediatric anaesthesia, cardio-thoracic anaesthesia, obstetric, regional anaesthesia, head and neck/ENT anaesthesia and airway management. Dr Tao enjoys traveling with her husband and two children.

Dr Martin Chau


Dr Martin Chau graduated from Sydney University. He also has a Master Degree of Medicine in Clinical Epidemiology which emphasizes on providing clinical practice according to the best current evidence. He completed his anaesthetic training at Prince of Wales Hospital and Sydney Hospital. He is a VMO anaesthetist at Auburn Hospital, Blacktown Hospital, Norwest Private Hospital, Prince of Wales Private Hospital and Westmead Private Hospital. His areas of special interest are paediatric, dental/maxillofacial, ENT, urological, obstetric and gynaecological anaesthesia. He enjoys good food and exercise.

Dr Sandra Cheng


Dr Sandra Cheng is a specialist anaesthetist who completed both her specialist training and her undergraduate medicine degree in Sydney. She has completed a combined fellowship in paediatric and adult anaesthesia at the Sydney Children’s and Prince of Wales Hospitals, as well as a simulation fellowship at the Royal North Shore Simulation Centre.

Her interests include paediatric anaesthesia, medical education, and anaesthesia for day surgery. She enjoys getting a “good run” through Sydney traffic, and undisturbed sleep time.

Dr. Yvonne

Dr Yvonne Chau

Paediatric Dentist 

Dr Yvonne graduated with a Bachelor of Dental Science (Honours) from The University of Melbourne. She graduated with Distinction for the Master of Dental Surgery in Paediatric Dentistry from The University of Hong Kong and is a member of the Royal College of Surgeons (Edinburgh) and Royal Australasian College of Dental Surgeons in Paediatric Dentistry. Since 2016, Yvonne has been working as a staff specialist at the Department of Paediatric Dentistry, Sydney Dental Hospital where she teaches postgraduate dental students. With over 10 years of experience in both public and private sectors, Yvonne is committed to providing a friendly and positive dental experience for all children, so that they may enjoy lifelong benefits of good oral health.

Outside of work Dr Yvonne enjoys arts and crafts and playing Tennis.