Anne Giraudeau1, Marion Jeany1, Elodie Ehrmann2, Jacques Déjou1, Imed Ouni3, Jean-Daniel Orthlieb1. 1. a Faculté d'Odontologie , Aix Marseille Université , Marseille 13005 , France. 2. b Faculté d'Odontologie , Université de Nice Sophia-Antipolis , Nice 06357 , France. 3. c Faculty of Odontology , Monastir University , Monastir 5019 , Tunisia.
Abstract
OBJECTIVE: The purpose of this retrospective study is to evaluate a clinical diagnostic sign for disc displacement without reduction (DDWR), the absence of additional condylar translation during opening compared with protrusion. METHOD: Thirty-eight electronic axiographic and magnetic resonance imaging (MRI) examinations of the TMJ were analyzed in order to compare the opening/protrusion ratio of condylar translation between non-painful DDWR and non-DDWR. RESULT: According to the Mann-Whitney U test, the opening/protrusion ratio in non-painful DDWR differs significantly from non-DDWR (p < 0.0001). DISCUSSION: Among non-painful DDWR, there is no additional condylar translation during opening in comparison with protrusion, and this is probably also the case for DDWR without limited opening, which is a subtype that has not been validated by the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD). Comparative condylar palpation can analyze this sign, and therefore, further comparative investigations between MRI and clinical examination are needed to validate the corresponding clinical test.
OBJECTIVE: The purpose of this retrospective study is to evaluate a clinical diagnostic sign for disc displacement without reduction (DDWR), the absence of additional condylar translation during opening compared with protrusion. METHOD: Thirty-eight electronic axiographic and magnetic resonance imaging (MRI) examinations of the TMJ were analyzed in order to compare the opening/protrusion ratio of condylar translation between non-painful DDWR and non-DDWR. RESULT: According to the Mann-Whitney U test, the opening/protrusion ratio in non-painful DDWR differs significantly from non-DDWR (p < 0.0001). DISCUSSION: Among non-painful DDWR, there is no additional condylar translation during opening in comparison with protrusion, and this is probably also the case for DDWR without limited opening, which is a subtype that has not been validated by the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD). Comparative condylar palpation can analyze this sign, and therefore, further comparative investigations between MRI and clinical examination are needed to validate the corresponding clinical test.
Entities:
Keywords:
Adhesion and TMD; Clinical diagnosis and TMD; Degenerative changes and TMD; Disc displacement without reduction; Evaluation of condylar translation using axiography; Internal derangement of temporomandibular joint; Magnetic resonance imaging and TMD