Dennis Ardouin was a consultant orthodontist in Tunbridge Wells, Eastbourne and Hastings. He was born on 8 February 1930. Though his grandfather, George Ardouin, had been a tailor, his father, Joseph Francis Ardouin, was a dental surgeon. His mother was Martha Louise Ardouin née Zucca. Dennis went to Oakwood Primary School in Southgate, north London, followed by Edmonton County School, close to where his father, a founder member and secretary of the local dental committee, had his practice. After completing his National Service, Dennis entered the Royal Dental Hospital School of Dental Surgery in 1951. A keen sportsman, and a lifetime supporter of Arsenal, he played football for the Royal, and later organised cricket tours in the West Country for fellow students. He completed his specialist orthodontic training at the Eastman Dental Institute and, now determined on a hospital career, achieved his fellowship while a senior registrar there. In 1968 he was appointed as the first consultant orthodontist to Tunbridge Wells, Eastbourne and Hastings hospitals, where he set up an excellent service and established a senior registrar post linked with the Royal Dental Hospital. Always meticulous in assessment and thoughtful in treatment planning, he was an outstanding teacher to a generation of senior registrars, several of whom have gone on to play significant national and international roles. Outside dentistry, Dennis played squash and enjoyed travelling and walking (he completed the 630-mile southwest coastal path). He was very knowledgeable about classical music, especially opera and in retirement his large garden gave him much pleasure and satisfaction, particularly in the growing of his own vegetables. Dennis died on 8 March 2017 at the age of 87. He was survived by his wife Anthea (née Rousset), whom he married in 1969, two daughters and five grandchildren.