Is the morphology of the articular eminence of the temporomandibular joint a predisposing factor for disc displacement?

The aim of this study was to assess the shape of the temporomandibular joint (TMJ) articular eminence and the articular disc configuration and position in patients with disc displacement. TMJ magnetic resonance images (MRI) of 14 patients with bilateral disc displacement without unilateral reduction were analyzed. Articular eminence morphology was characterized as box, sigmoid, flattened, or deformed. Articular disc configuration was divided into biconcave, biplanar, biconvex, hemiconvex or folded, and its position, as "a" (superior), "b" (anterosuperior), "c" (anterior) or "d" (anteroinferior). The images were divided and the sides with disc displacement with reduction (DDWR) and without reduction (DDWOR) were compared. Regarding articular eminence shape, the sigmoid form presented the greatest incidence, followed by the box form, in the DDWR side, although this was not statistically significant. In the DDWOR side, the flattened shape was the most frequent (p = 0.041). As to disc configuration, the biconcave shape was found in 79% of the DDWR cases (p = 0.001) and the folded type predominated in 43% of the DDWOR cases (p = 0.008). As to disc position, in the DDWR side, "b" (anterosuperior position) was the most frequent (p = 0.001), whereas in the DDWOR side, "d" (anteroinferior position) was the most often observed (p = 0.001). The side of the patient with altered disc configuration and smaller shape of TMJ articular eminence seems to be more likely to develop non-reducing disc displacement as compared to the contralateral side.

Download Full-text

Changes in temporomandibular joint anatomy, changes in condylar translation, and their relationship with disc displacement: magnetic resonance imaging study

Radiologia Brasileira ◽

10.1590/0100-3984.2018.0020 ◽

2019 ◽

Vol 52 (2) ◽

pp. 85-91 ◽

Cited By ~ 1

Author(s):

Luciane Marie Bedran ◽

Alair Augusto Sarmet Moreira Damas dos Santos

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Temporomandibular Joint ◽

Temporomandibular Disorder ◽

Imaging Study ◽

Disc Displacement ◽

Glenoid Fossa ◽

Resonance Imaging ◽

Articular Eminence ◽

Articular Surfaces

Abstract Objective: To assess changes in the articular surfaces of the temporomandibular joint (TMJ) and in condylar translation, as detected by magnetic resonance imaging (MRI), determining whether such changes correlate with disc displacement. Materials and Methods: We retrospectively analyzed the MRI scans of 2076 TMJs of 1038 patients with symptoms of temporomandibular disorder. We attempted to determine whether articular disc deformity and changes in condylar translation, as well as changes in the articular surfaces of the condyle, glenoid fossa, and articular eminence, correlated with disc displacement. Results: Disc displacement with reduction was associated with changes in the shape of the articular eminence. Disc displacement without reduction was most strongly associated with disc deformity, condylar degeneration, glenoid fossa degeneration, and effusion. Neither decreases nor increases in condylar translation were associated with disc deformity, degenerative bone changes, or disc displacement. Conclusion: Changes in the shape of the articular eminence seem to predispose to progression of internal derangement of the TMJ.

Download Full-text

Flattening of the articular eminence correlates with progressive internal derangement of the temporomandibular joint

Dentomaxillofacial Radiology ◽

10.1038/sj.dmfr.4600542 ◽

2000 ◽

Vol 29 (5) ◽

pp. 277-279 ◽

Cited By ~ 21

Author(s):

H Kurita ◽

A Ohtsuka ◽

H Kobayashi ◽

K Kurashina

Keyword(s):

Temporomandibular Joint ◽

Internal Derangement ◽

Articular Eminence

Download Full-text

Synovial Tissue Proteins and Patient-Specific Variables as Predictive Factors for Temporomandibular Joint Surgery

Diagnostics ◽

10.3390/diagnostics11010046 ◽

2020 ◽

Vol 11 (1) ◽

pp. 46

Author(s):

Mattias Ulmner ◽

Rachael Sugars ◽

Aron Naimi-Akbar ◽

Nikolce Tudzarovski ◽

Carina Kruger-Weiner ◽

...

Keyword(s):

Temporomandibular Joint ◽

Synovial Tissue ◽

Surgical Outcome ◽

Clinical Decision Making ◽

Protein Profile ◽

Strong Association ◽

Tissue Inhibitor Of Metalloproteinase ◽

Patient Specific ◽

Disc Displacement ◽

Patient Reported

Our knowledge of synovial tissues in patients that are scheduled for surgery as a result of temporomandibular joint (TMJ) disorders is limited. Characterising the protein profile, as well as mapping clinical preoperative variables, might increase our understanding of pathogenesis and forecast surgical outcome. A cohort of 100 patients with either disc displacement, osteoarthritis, or chronic inflammatory arthritis (CIA) was prospectively investigated for a set of preoperative clinical variables. During surgery, a synovial tissue biopsy was sampled and analysed via multi-analytic profiling. The surgical outcome was classified according to a predefined set of outcome criteria six months postoperatively. Higher concentrations of interleukin 8 (p = 0.049), matrix metalloproteinase 7 (p = 0.038), lumican (p = 0.037), and tissue inhibitor of metalloproteinase 2 (p = 0.015) were significantly related to an inferior surgical outcome. Several other proteins, which were not described earlier in the TMJ synovia, were detected but not related to surgical outcome. Bilateral masticatory muscle palpation pain had strong association to a poor outcome that was related to the diagnoses disc displacement and osteoarthritis. CIA and the patient-reported variable TMJ disability might be related to an unfavourable outcome according to the multivariate model. These findings of surgical predictors show potential in aiding clinical decision-making and they might enhance the understanding of aetiopathogenesis in TMJ disorders.

Download Full-text