TNOA was inaugurated on 23.12.1970 by Prof. Robert Roaf, then Professor of Orthopaedic Surgery, University of Liverpool. Prof. M. Natarajan, First President & Prof. P.V.A. Mohandass, First Secretary cum Treasurer, Now it is a second largest state chapter of IOA with more than 2000 life members. Always known for its academic excellence and community services. Reaches all parts of the state with 23 affiliated district / city ortho clubs. Winner of AK Gupta Trophy, OASIS Best Chapter & BJD Awards.