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(02) 9743 2262



(02) 9743 2263



402 Concord Road,

Concord West, NSW 2138

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Meet the team

Dr Jonathan Chi



Dr Chi graduated from Sydney University in 1994 and  obtained his specialist orthodontic qualifications from  Otago University in 1999. Since then, he has been  practicing as an orthodontic specialist in the Sydney  area and rural New South Wales. Dr Chi sees both  children, teenagers and adults and is a firm believer in  listening to a patient’s needs.


Dr Chi has authored a number of articles published in  both Australian and International academic journals  and has been an examiner of both general and specialist dental students. He maintains an active involvement in postgraduate education and has a special interest in adult orthognathic surgery, orofacial pain and prosthodontic rehabilitation.




Dr Samuel Chi

BDS (Syd) MDSc


Dr Samuel Chi has been practising as a specialist orthodontist for over thirty years and has worked in the  Castle Hill area since 1974. Indeed he has treated  many of the children and even grandchildren of his  former patients! Over the years, Dr Chi has acquired a  wealth of experience and knowledge in all aspects of  advanced orthodontic treatment. Let Dr Chi share this  knowledge with you as he creates the smile you have  always wanted.



Dr John Vassiliadis


Clinical Associate Professor John Vassiliadis provides all the administration of sedation at Castle Hill Orthodontics. He is a Senior Emergency Medicine Specialist at Royal North Shore Hospital.

He has had training in sedation, anaesthesia, trauma management, trauma ultrasound and toxicology. John is also a Commander in the Royal Australian Navy Reserves and was part of Australia’s medical relief force that was sent to Indonesia after the Boxing Day tsunami.

He has a keen interest in medical education and is involved in training doctors at all levels and is a Clinical Associate Professor at the Sydney Medical School, University of Sydney.



Dr Cecilia So

BDS Hons (Syd), MFDS (Lond), Grad Dip Clin Dent (Oral Implants) (Syd)

Dr Cecilia So completed her Bachelor of Dental Surgery at University of Sydney, with Honours in 2003. She has a keen interest in surgical dentistry and has advanced her training in the department of Oral & Maxillofacial Surgery at the Royal Exeter and Devon hospitals in the UK, following which she completed her Fellowship in the Royal College of Surgeons (Eng) 2005. She has completed additional training in oral implant surgery, with a Graduate Diploma in Clinical Dentistry at University of Sydney and is now part of the steering committee for the program. She is involved in teaching with the University of Sydney in both Oral Surgery and Oral Implants.

Her main interest lies in providing her services to several private practices around Sydney and in the Blue Mountains region. Additionally, she is currently employed in the Department of Special Care at Westmead Hospital where she provides mainly surgical care for those patients with special needs including phobic patients. She is also actively involved in mentoring and training other dentists interested in the field and ensures continual professional development.