North Coast Endodontics

About Us

Dr. Sydney Bader

Dr. Sydney Bader obtained his BDSc from the University of Witwatersrand, South Africa in 1981 and completed his Endodontic speciality in 1993 at Temple University, Philadelphia USA.

Dr. Bader is a member of the Australian and New Zealand Academy of Endodontists.

Dr. Bader practised general dentistry for 10 years in North Ryde and has been practising as an Endodontist in Chatswood since 1993. Dr. Bader has practices at Dee Why, Chatswood, Gosford and Ballina.

Dr. Bader travels periodically to South East Asia where he teaches and provides endodontic treatment to the underprivileged.

Syd also enjoys flying, motorbikes and music.


Dr. John Barbat

Dr. John Barbat obtained his BDSc in 1977 from the University of Queensland and MDSc in 1996 from the University of Melbourne. He is a specialist clinical associate at Sydney University and is actively involved in undergraduate and postgraduate teaching, including courses with ADA NSW.

Dr. Barbat is a fellow of Pierre Fauchard Academy, a fellow of the International College of Dentists and a member of the Australian and New Zealand Academy of Endodontists.

Dr. Barbat served as a dental officer in the Royal Australian Army Dental Corp and has practised general dentistry in Australia and the United Kingdom. He has been practising full time as an Endodontist in Chatswood since 1996. Dr. Barbat has practices at Dee Why, Chatswood and Gosford. 


Dr Christine Premdas-Rogers

Dr. Christine Premdas-Rogers obtained her BDS from the Turner Dental School of the University of Manchester in 1986. Following that, she also received her MSc in endodontics with distinction at Guy’s Dental Hospital in 1993.

Christine gained her MRD RCS of the Royal College of Surgeons of England and Glasgow in 1996 and was admitted to the General Dental Councils’s specialist list in 1998. Christine joined the Lister House Endodontic Practice, London in 1994 and opened her own specialist referral practices in 1999 and 2003 in Essex, UK. Christine has been involved in postgraduate teaching since 1993.

Until leaving the UK she was an honorary senior clinical lecturer, specialist practitioner, examiner and co-ordinator for the endodontic courses for the MSc in restorative dentistry at the Eastman Dental Institute, University College of London. Christine also enjoys singing and performing in amateur opera, country walks and scuba diving.


Dr James Wealleans

Dr. James Wealleans is originally from Christchurch, New Zealand, he is married and has 2 children.

Dr. Wealleans obtained his DMD with honors from Nova Southeastern College of Dental Medicine, Fort Lauderdale, Florida in 2006 and completed an Advanced General Dentistry Residency in 2007 in Colorado Springs, Colorado.

In 2010, Dr. Wealleans graduated Endodontic Residency from the prestigious University of Texas Health Science Center and Wilford Hall Medical Center, San Antonio, Texas.

Dr. Wealleans is an American Board-Certified Endodontist, an accomplishment that only 20% of the specialty obtains.

Dr. Wealleans served as the Director of Endodontic Residency Training and Education from 2013-2018 at Wilford Hall Medical Center, San Antonio, Texas. He has held teaching appointments as Associate Professor with Uniformed Services University of the Health Sciences and Assistant Professor with University of Texas Health Sciences, San Antonio, Texas.

Dr. Wealleans has authored over 10 published research papers and serves as a scientific advisor for the Journal of Endodontics. In 2017, Dr. Wealleans invented guided endodontic microsurgery, for which he holds two US patents. He has lectured extensively both nationally and internationally.

In 2018, after serving 20 honorable years in the Air Force, Dr. Wealleans retired as Lt. Colonel. He has now moved to Sydney, where will devote his time practising endodontics on the North Shore, Northern Beaches and Central Coast.


Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.