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

Kurita, H; Ohtsuka, Akiko; Kobayashi, H; Kurashina, Kenji

doi:10.1038/sj.dmfr.4600523

Cited by 48 publications

(43 citation statements)

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“…8,9,11 However, in the present study, we have found the eminence inclination to be higher in patients without TMJ dysfunction than in patients with TMJ dysfunction. Similarly, Ren et al 27 found the eminence inclination to be steeper in symptom-free patients than in those with internal derangement.…”

Section: Eminence Inclinationcontrasting

confidence: 53%

“…The first was the best-fit line method that was the angle between Ebf and Frankfort horizontal ( Figure 2); the second was the top-roof line method that was the angle between Etr and Frankfort horizontal ( Figure 3). [7][8][9][10][11][12][13][14][15][16] The eminence height was established by the measurement of the perpendicular Figure 1 Lines and angles used in the study. Ebf, eminence inclination best-fit line; Etr, eminence inclination top-roof line; Eh, eminence height distance between the lowest point of the articular eminence and the highest point of the fossa ( Figure 4).…”

Section: Measurementsmentioning

confidence: 99%

“…The inclination of articular eminence varies among people and it dictates the path of condylar movement as well as the degree of rotation of the disc over the condyle. 1,2 Many methods are used to examine the inclination of articular eminence, such as measurements on dry skulls, [3][4][5] conventional radiography 6 and tomography, 1,7 MRI [8][9][10][11] and CT. [12][13][14] However, CT machines have limitations in dentistry because of their high cost, large footprint and high radiation exposure. Cone beam CT (CBCT) has recently been developed as an alternative to conventional CT for dental and maxillofacial diagnostic osseous tasks.…”

Section: Introductionmentioning

confidence: 99%

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Radiological examination of the articular eminence morphology using cone beam CT

Sumbullu¹,

Çağlayan²,

Akgül³

et al. 2012

Dentomaxillofacial Radiology

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Objective: The purpose of the present study was to investigate the articular eminence inclination and height according to age and gender in patients with temporomandibular joint (TMJ) dysfunction and healthy controls using cone beam CT (CBCT). Methods: The measurements were performed on CBCT records of 52 TMJ dysfunction patients (11 males and 41 females) and 41 control patients (17 males and 24 females). The eminence inclination and height were measured on the CBCT images. Results: The eminence inclination and height values were higher in males than in females in both TMJ dysfunction patient and control groups; however, these differences were not statistically significant (p . 0.05). While no statistically significant differences were found in the eminence inclination and height values between the age groups (p . 0.05) in the TMJ dysfunction patient group, there were statistically significant differences in the control group. The eminence inclination was highest between the ages of 21 and 30 years and showed a decrease after the age of 30 years. Additionally, the eminence inclinations of the control patients were statistically higher than those of the TMJ dysfunction patients. Conclusion: There were no statistically significant differences in eminence inclination and height according to gender. The eminence inclination reaches its highest value between the ages of 21 and 30 years and shows a decrease after the age of 31 years in healthy patients. The eminence inclination was steeper in healthy control patients than in patients with TMJ dysfunction.

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Section: Eminence Inclinationcontrasting

confidence: 53%

Section: Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radiological examination of the articular eminence morphology using cone beam CT

Sumbullu¹,

Çağlayan²,

Akgül³

et al. 2012

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

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“…Although articular eminence morphology was stated as an aetiological factor in the development of TMJ ID in several articles (Hall et al, 1985;Sato et al, 1999;Sülün et al, 2001), there are authors who did not support these results too (Galante et al, 1995;Ren et al, 1995;Kinniburgh et al, 2000;Kurita et al, 2000a.). Additionally, it is argued that articular eminence flattening can be a result of internal disorders (Kurita et al, 2000b;Emshoff et al, 2003).…”

Section: Introductionmentioning

confidence: 83%

Evaluation of Articular Eminence Morphology and Inclination in TMJ Internal Derangement Patients with MRI

et al. 2012

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SUMMARY: Articular eminence morphology and inclination are reported to be two predisposing factors for the internal derangement (ID). The purpose of this study is to investigate the relationship between the inclination and morphology of the articular eminence and ID. The study included 70 temporomandibular joints with ID in 35 patients: 51 joints had disc displacements with reduction (DDWR) and 19 joints had disc displacements without reduction (DDWOR). All subjects underwent bilateral high resolution magnetic resonance imaging scans which were performed in the sagittal and coronal planes with mouths closed and opened. Articular eminence morphology was characterized as box, sigmoid, flattened, or deformed. Articular eminence inclination was measured at three positions: steep (from 60° to 90°), moderate (from 30° to 60°) and shallow (from 15° to 30°). The images were divided into two; DDWR and DDWOR, and these two criteria were compared. The images of the two groups were compared; while flattened form was occurred with the highest incidence in the DDWOR group, sigmoid form was the most frequent in the DDWR group and articular eminence inclination was found steeper than it was for the DDWOR group. The steepness of the articular eminence may not have a predisposing effect on the development of disc displacements.

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“…Ancak, intermedian böl-genin anatomisini gösteremez, lateral-median s›n›r› belirlemede kullan›l›r (11,12).…”

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Temporomandi̇bular Eklem Patoloji̇leri̇ni̇n Tanisinda Manyeti̇k Rezonans Görüntüleme İle Ki̇neti̇k Manyeti̇k Rezonans Görüntülemeni̇n Yeri̇

Babadağ¹

2005

Ankara Üniversitesi Diş Hekimliği Fakültesi Dergisi

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This study was based on a group of 100 patients with TMJ complaints who were attempted to Department of Oral Diagnosis and Radiology, Faculty of Dentistry, Ankara University. The diagnosis was made which the age of the patient's symptom and their clinical examination, and MR imaging and kinematic MR imaging findings. The findings were in agreement with the literature.In conclusion, it was found that the MR imaging and kinematic MR imaging technique's diagnostic capabilities were the best for evaluating of disc displacements and TMJ pathologies.

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

Cited by 48 publications

References 0 publications

Radiological examination of the articular eminence morphology using cone beam CT

Radiological examination of the articular eminence morphology using cone beam CT

Evaluation of Articular Eminence Morphology and Inclination in TMJ Internal Derangement Patients with MRI

Temporomandi̇bular Eklem Patoloji̇leri̇ni̇n Tanisinda Manyeti̇k Rezonans Görüntüleme İle Ki̇neti̇k Manyeti̇k Rezonans Görüntülemeni̇n Yeri̇

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