Magnetic resonance evaluation of the temporomandibular joint disc position and configuration.

Murakami, Shumei; Takahashi, Akira; Nishiyama, Hiroaki; Fujishita, M.; Fuchihata, Hajime

doi:10.1259/dmfr.22.4.8181648

Cited by 87 publications

(59 citation statements)

References 6 publications

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“…Additionally, all of the folded discs were found in patients in advanced stages of internal derangement (ADWOR). Similar results were found by Murakami et al 24 and Hirata et al 10 These findings indicate that the articular disc tends to become deformed with the advancement of disc displacement. We cannot, however, assert a relationship of cause and effect because of this study's design; a longitudinal study would be more appropriate for that.…”

supporting

confidence: 88%

“…Murakami et al 24 classification was used for this evaluation, as follows: biconcave, both upper and lower surfaces are concave; biplanar, even thickness; biconvex, both upper and lower surfaces are convex; hemiconvex, upper surface is concave and lower is convex; and folded, the disc is folded at the centre ( Figure 3).…”

Section: Methodsmentioning

confidence: 99%

“…The results showed an association between disc displacement and changes in the morphology of the articular disc, in agreement with the literature. 7,15,24,[36][37][38] Most of the normally positioned discs showed a biconcave shape, while none of them had a folded shape. Additionally, all of the folded discs were found in patients in advanced stages of internal derangement (ADWOR).…”

mentioning

confidence: 99%

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Correlation between temporomandibular joint morphology and disc displacement by MRI

Farias¹,

Melo²,

Bento³

et al. 2015

Dentomaxillofacial Radiology

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Objectives:The aim was to evaluate the morphology of the temporomandibular joint's (TMJs) disc and condyle as well as its correlation with disc displacement, using MRI. Methods: 190 TMJs were retrospectively analysed. The condyle morphology of each TMJ was evaluated by two observers using both axial and coronal views, as were their disc morphology and displacement, using sagittal view. Condyle morphology was classified as flat, convex, angled or rounded in the coronal sections and as anterior side flat/posterior side convex, biconvex, anterior side concave/posterior side convex, flat or biconcave in the axial view. Disc morphology was determined as biconcave, biplanar, biconvex, hemiconvex or folded. x 2 , Fisher exact and Bonferroni correction tests were used to evaluate the data. ANOVA followed by post hoc Tukey's test was used to evaluate the interaction between age and disc displacement. Results: Anterior disc displacement with reduction; convex condyle morphology in the coronal view; anterior side concave/posterior side convex morphology in the axial view; and biconcave discs were found to be the most prevalent findings. An association was observed between disc morphology and disc displacement (p , 0.001). No correlation between condyle morphology and TMJ disc displacement was found (p 5 0.291 for axial and p 5 0.14 for coronal views). Conclusions:The results of this study suggest that TMJ disc morphology is associated with disc displacement.

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confidence: 88%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Correlation between temporomandibular joint morphology and disc displacement by MRI

Farias¹,

Melo²,

Bento³

et al. 2015

Dentomaxillofacial Radiology

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“…ID of the TMJ, the most common type of temporomandibular disorders, has been defined as an abnormal positional relationship among the disc and condyle, articular eminence, and/or articular fossa (Murakami et al, 1993). 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.).…”

Section: Introductionmentioning

confidence: 99%

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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“…The TMJ is considered to be the best target for MRI in the oral and maxillofacial region (Murakami et al, 1992;Larheim et al, 2001), and a digital subtraction method has been introduced to detect slight differences among states (Molloi et al, 1998;Remonda et al, 2002). In the dental field, measurement of distances below 0.1 mm has been reported to be very useful (Sato et al, 1998).…”

mentioning

confidence: 99%

Influence of mouthguard on temporomandibular joint

Murakami

Maeda

Ghanem

et al. 2008

Scandinavian Med Sci Sports

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The aim of this study is to examine whether wearing a mouthguard (MG) has an influence on temporomandibular joint (TMJ) components (i.e., the condyle and the articular disk) and whether clenching with a resilient MG has an effect on the same components. Twenty-six healthy volunteers (15 females, 11 males) with an age range of 26-42 years old (median 28 years) participated in this study. Among all 52 joints in the 26 subjects, anterior disk displacement (AntDD) was recognized in 15. Thus, we classified the 52 joints into two groups, the AntDD group and the Normal group. Resilient thermoplastic materials were used to fabricate two types of MG, one that raised the vertical dimension height by 3 mm and another that raised it by 6 mm. Subjects were scanned with/without two types of MG with/without clenching by magnetic resonance imaging (MRI). The movement of the condylar head and articular disk was measured in the magnetic resonance images using the special subtraction technique. Wearing the MG without clenching did not have a negative influence on the TMJ and clenching in the Normal group. In the AntDD group, however, the relationship between the disk and condyle was affected by clenching and the degree of disk displacement was worsened by clenching with the thicker MG. From our results, we recommend that athletes with an internal derangement of the TMJ not wear the thicker MG and attention should be paid to its setting. And the subtraction technique using MRI was thought as a good tool for detecting a slight change in the TMJ.

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Magnetic resonance evaluation of the temporomandibular joint disc position and configuration.

Cited by 87 publications

References 6 publications

Correlation between temporomandibular joint morphology and disc displacement by MRI

Correlation between temporomandibular joint morphology and disc displacement by MRI

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

Influence of mouthguard on temporomandibular joint

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