Early Life and Education - Born in Liverpool in 1881 - Attended Thetford Grammar School - Studied at Victoria University (UK) - Obtained L.D.S.R.C.S. degree from University of Liverpool School of Dentistry in 1903 - Appointed Dental House Surgeon at Royal Liverpool University Hospital

Career and Contributions - Practiced in Southport, Lancashire - Traveled to the USA and obtained dental degree from Pennsylvania College of Dental Surgery - Graduated from Angle School of Orthodontia in 1905 - Worked with George Northcroft for 2 years - Established his own orthodontic practice in 1921

Awards and Positions - President of the British Dental Association in 1934 - President of the Royal Society of Medicine, Odontological Section in 1943 - President of the European Orthodontic Society in 1938 - Secretary (1910–1925), President (1925–1952), and Honorary Treasurer (1942–1952) of the British Society for the Study of Orthodontics - Faculty member at Barts and The London School of Medicine and Dentistry for 40 years

Contributions to Orthodontics - First person in England to solely practice orthodontics - Organised the first postgraduate course on orthodontics in England - Awarded Faculty of Dental Surgery by the Royal College of Surgeons of England in 1947 - Played a significant role in the development of orthodontics in Europe - Made important contributions to the understanding of etiology in orthodontic cases

References - British Orthodontic Society Museum and Archive - History of Orthodontics - Key Figures - Harold Chapman (source: www.bos.org.uk) - American Journal of Orthodontics (C. V. Mosby, 1915) - Wilson, Herbert Edward (1966) - 'Harold Chapman' - American Journal of Orthodontics, 52(6): 454–459 - Phulari, Basavaraj Subhashchandra (2013) - 'History of Orthodontics' - JP Medical Ltd. - ISBN 9789350904718 - Chapman, Harold (1927) - 'Etiology in Orthodontic Cases' - The Journal of the American Dental Association, 14(11): 2046–2056