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Disc displacement without reduction: a retrospective study of a clinical diagnostic sign |
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| Authors: | Anne Giraudeau Marion Jeany Elodie Ehrmann Jacques Déjou Imed Ouni Jean-Daniel Orthlieb |
| Affiliation: | 1. Faculté d’Odontologie, Aix Marseille Université, Marseille 13005, France;2. Faculté d’Odontologie, Université de Nice Sophia-Antipolis, Nice 06357, France;3. 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. |
| Keywords: | Internal derangement of temporomandibular joint Evaluation of condylar translation using axiography Magnetic resonance imaging and TMD Clinical diagnosis and TMD Disc displacement without reduction Adhesion and TMD Degenerative changes and TMD |