Forthcoming OSI Meetings 2025 OSI Autumn Meeting 14th - 15th November, Johnstown Estate Hotel, Johnstown, Enfield, Co. Meath The Autumn OSI meeting is open to Registered Specialist Orthodontists, Orthodontic Therapists, Nurses and front of house. There will be no 2026 Spring meeting due to the EOS meeting being held in Dublin, June 2026