About us

Set in the heart of Richmond, London, Root Canal Dental Referral Centre offers specialist endodontics and root canal treatments in a luxury setting at a fair price.


Dr Nicolai Orsteen

DDS Oslo 2002
Specialist in Endodontics
GDC Number: 175404

Nicolai was born and raised in Norway. He gained both his dental and specialist degrees from the world-renowned Department of Endodontics at Oslo University, Norway.

Nicolai earned his DDS from the University of Oslo in February 2002. He spent four years working as a general dental practitioner before continuing a further three years full-time studies to gain his specialist degree. During his time at university, Nicolai worked as both a clinician and an educator of dental students.

Since qualifying as a specialist in 2009, he has worked in private clinics both in Oslo and London as a registered specialist in Endodontics.

In 2017 he founded The Root Canal Dental Referral Centre with a vision to create a first-rate dental referral practice with a clear focus on the patients and the referring dentists. He is aiming to make the referral process as smooth and as efficient as possible both for patients and dentists.

With more than 10 years of experience as an Endodontic specialist, Nicolai provides pain-free root canal treatments to the highest standards. He particularly enjoys the challenge of complex root canal cases.

Nicolai is a member of the British Endodontic Society and a specialist member of the American Association of Endodontists.

A message from Nicolai

My name is Nicolai Orsteen and I am a registered specialist in endodontics in both the UK and my home country of Norway. I have worked as a specialist for more than 10 years, and my practice is solely limited to root canal treatments. In my opinion, you need to practice tirelessly to be an expert in your field, and I have successfully completed more than 10,000 root canal treatments.

Amongst other places, I have worked in a specialist endodontic practice in Harley Street. I eventually set up the Root Canal Dental Referral Centre to offer patients in and around Richmond high quality specialist root canal treatment for a reasonable fee.

Dr Ammar Al Hourani

BDS Glasgow 2009
DDSc (Endodontology), MFDS RCS Edin, MEndo RCS Edin
Consultant and Clinical Lecturer, Peninsula Dental School
Specialist in Endodontics
GDC Number: 177319

Ammar was born and raised in Scotland. He studied both at Glasgow Dental School and at Liverpool Dental School.

Ammar achieved his Bachelor of Dental Surgery from Glasgow Dental School in 2009. After spending several years as a Senior House Officer (Glasgow & Dundee Dental Hospital), as well as a General Dental Practitioner in Scotland, Ammar realised that Endodontics was the field of dentistry that he really enjoyed the most. He embarked on a three-year full-time Endodontic Specialist training programme at Liverpool Dental School. This training programme allowed him to gain extended skills in root canal therapy and achieve a Doctorate in Dental Science. His doctorate project investigated the effect of orthodontic treatment on traumatised teeth and its implications on the dental pulp.

Ammar is currently an Honorary Consultant in Endodontics and Clinical Lecturer at Peninsula Dental School. He lectures nationally and internationally with many distinguished educational institutes. Ammar’s passion for teaching and academia led him to create The EndoGuys, which provides endodontic teaching to general dental practitioners across the UK.

Ammar offers all aspects of endodontic therapy, be it non-surgical or surgical endodontics, as well as trauma management and paediatric endodontics, in a relaxing, patient-friendly and pain-free approach.