Ambrosina Michelotti obtient son diplôme de chirurgien dentiste en 1984; Honorary Degree in Dentistry à l’Université de Malmo (Sweden) en 2018. Full professor in Orthodontics and Clinical Gnathology. Directeur du post-graduated School in Orthodontics and Master course sur la “Douleur Orofaciale et les Dysfonctionnements Temporomandibulaires” à l’Université de Naples Federico II. Éditeur en chef de l’Orthodontic and Craniofacial Research journal, éditeur associé de l’European Journal of Oral Science et du Journal of Oral Rehabilitation, membre de l’Editorial Board de l’European Journal of Orthodontics.

JEUDI 12 MARS, 15H15

Update on the etiopathogenesis of TMD: Malocclusions, asymmetry, skeletal class II, hyperdivergency, cross bite

Occlusion has been considered for years as one of the major aetiological factor causing Temporomandibular Disorders (TMD). Nevertheless, at now the associations reported are few, weak and not consistent across the studies. Furthermore the correction of the malocclusion by an orthodontic treatment did not change the risk of developing TMJ sounds. Hence at today, the role of occlusion in the aetiology of TMD has not been clearly addressed and therefore it should not be overstated, also considering that in some cases occlusal changes could be the consequence rather than a cause for TMDs. Alterations in the temporomandibular joint (TMJ), including congenital developmental (i.e. aplasia, hypo ⁄ hyperplasia), acquired (i.e. neoplasms) and inflammatory (i.e. systemic arthritides, rheumatoid arthritis) disorders, can cause occlusal changes. Indeed the board concept of occlusion has to be expanded from the only peripheral input, referring mainly to how the anatomical and central adaptability react to this stimulus. Hence patients’ individual adaptability has to be taken into account by clinicians to prevent iatrogenic maladaptive behaviours.