Ajanthan qualified from the University of Manchester in 2000. After a short period as a general dental practitioner, he worked in the Oral and Maxillofacial Surgery Department at Preston and Blackpool Hospital. He was granted membership of the Royal College of Surgeons in 2003.
In 2007 Ajanthan embarked upon a Masters program in Implant Dentistry at Salford University. He was awarded his Masters with merit in 2011. Ajanthan enjoys all aspects of dentistry but has a special interest in implants and oral surgery.