Dr. İşeri is the Head of Orthodontic Department and Dean of the Dental School of İstanbul Yeni Yüzyıl University. He is a past President of the Turkish Orthodontic Society and an active member of Edward H. Angle Society.
He acted in the Editorial Boards of European Journal of Orthodontics, AJO-DO, Angle Orthodontist, Seminars in Orthodontics and Journal of Mondo Ortodontico. He published the June 2012 issue of Seminars in Orthodontics ‘’Maxillary Expansion and Mandibular Widening: Treatment Methods and Stability’’ as the guest editor. He worked as a research fellow at the University of Copenhagen and involved in collaborated research with the Universities of Washington, Copenhagen, Tel Aviv and Padova.
His main research interests are growth and development of the craniofacial skeleton, maxillary expansion, open bite treatment, adult orthodontics, skeletal anchorage with mini screws, orthognathic surgery and distraction osteogenesis, accelerated orthodontic treatment and diagnosis and treatment of obstructive sleep apnea.
He published 70 articles and book chapters and has given about 200 lectures, conferences and courses worldwide.

