AI Article Synopsis
- This study assessed a clinical sign related to disc displacement without reduction (DDWR) in the jaw, focusing on the difference in condylar movement during mouth opening versus jaw protrusion.
- The analysis of 38 TMJ examinations revealed a significant difference in the movement ratio for non-painful DDWR compared to non-DDWR, indicating a lack of additional translation during opening.
- The findings suggest that this absence of movement may also apply to another subtype of DDWR that hasn't been fully validated, highlighting the need for more research to confirm the clinical significance of these observations through both imaging and physical examination methods.
Article 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.
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| http://dx.doi.org/10.1080/08869634.2016.1149291 | DOI Listing |
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