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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 is a dental surgeon with extensive experience in wisdom teeth and dental implant procedures, in both hospital based and private practice settings.

After graduating with Honours with Bachelor of Dental Surgery at the University of Sydney in 2003. She worked as a Senior Dental Officer, in the Oral and Maxillofacial Department in Royal Devon and Exeter Hospital in the United Kingdom, achieving her Membership with the Royal College of Surgeons (London) by examination. 

She completed a Graduate Diploma in Clinical Dentistry (Oral Implants), University of Sydney and is now a committee member, mentor and Clinical Associate Lecturer and examiner for the program.  She is also an Executive committee member of the Australasian Osseointegration Society  and lectures in Surgical Dentistry for the General Dentist for the Australian Dental Association.

Dr Cecilia So has restricted her practice to dental implants, wisdom teeth removal and surgical extraction procedures. This gives all patients and clients confidence in the services that Surgical Dental Services provide everyday for general dental practices in the Greater Sydney region.