Prof Dr Marie Cornelis

Prof Dr Marie Cornelis

Prof Dr Marie Cornelis


How Efficient is Lingual Orthodontics?

To assess the efficacy of lingual orthodontics by comparing setups and posttreatment casts, consecutive patients treated with a customized lingual orthodontic appliance were included in this retrospective study. Pre- and post-treatment digital models were analyzed, as well as setups, and compared.

Statistically significant differences in bucco-lingual torque were found between the setups and posttreatment casts, for all upper teeth, except the central incisors. In the lower arch, statistically significant differences in bucco-lingual torque were found between the setups and posttreatment casts for the incisors and molars. Regarding the mesio-distal angulation of the anterior teeth, no statistically significant differences were found between setups and posttreatment casts in both upper and lower arches. The mean upper and lower intercanine distances, as well as the lower intermolar distance did not vary significantly between the setups and the posttreatment casts. The upper intermolar distance was significantly but not clinically different on the posttreatment casts compared to the setups. 

Orthodontic treatment using a customized lingual appliance is very efficient in terms of control of mesio-distal angulation of all anterior teeth, as well as intercanine and intermolar distances. Bucco-lingual torque is less efficiently controlled, especially in the upper arch. 


  • Marie A Cornelis received both her dental degree (1999) and her postgraduate specialist degree in orthodontics (2003) from the University of Louvain, in Brussels.
  • In 2007, she was a Visiting Research scholar at the University of North Carolina at Chapel Hill. She defended her PhD about miniplates as temporary skeletal anchorage in Brussels in 2008.
  • In 2010, she finished a 2-year degree in lingual orthodontics at the Université Descartes (Paris). She was awarded the WJB Houston Oral Research Award of the European Orthodontic Society in 2008 and the Dewel award as a coauthor of the best clinical paper in the American Journal of Orthodontics and Dentofacial Orthopedics in 2011.
  • Between 2009 and 2014, she was Assistant Professor at the Department of Orthodontics of the University of Geneva.
  • From 2014 to 2020, she was Associate Professor and Postgraduate Program Director of the Section of Orthodontics, Department of Dentistry, Aarhus University, and in 2015 she became Head of Section. At the same time, she maintained an active orthodontic practice in an interdisciplinary office in Geneva a few days per month.
  • She is an Active Member of the Angle Society of Europe and a full member of the European Board of Orthodontists.
  • In 2022, Marie became Professor and Head of Orthodontics at the Melbourne Dental School – a new challenge she is very much looking forward to. Her research interests are focused on clinical orthodontics, mainly skeletal anchorage, digital workflows and stability/retention.