Maria Costanza Meazzini acquired a Specialty in Orthodontics and Dentofacial Orthopedics and a Master in Medical Sciences and Oral Biology in 1995 at Harvard University, Boston. She then Completed a Cranio-Facial and Surgical Orthodontics Fellowship (University of Illinois at Chicago,1997) and subsequently three short trimestral fellowships in Craniofacial orthodontics in Taiwan, Chung Gung Memorial H, Tokio Medical center, and Gea Gonzalez H , Mexico City.
Since 1998, she is Scientific Director and Orthodontic consultant for Cranio-facial anomalies at the Smile House, CLP Center, San Paolo Hospital, in Milano and Consultant for the Department of Maxillo Facial Surgery, San Gerardo Hospital, Monza.
Since 2003 she has been Adjunct Professor in Pre-surgical Orthodontics and Orthodontics for Craniofacial Anomalies for the residencies in Maxillofacial Surgery and Orthodontics, University of Milano.
She is Past President of the Italian Society for Cleft Lip and Palate (SILPS).