A classification of temporomandibular joint disk morphology

Heffez, Leslie B.; Jordan, Steven L.

doi:10.1016/0030-4220(89)90293-4

Cited by 35 publications

(12 citation statements)

References 5 publications

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“…[20], suggested that over 15 degrees be included in assessing the difference between the inside and the outside of disk position; in addition, over 70 degrees should be included in the category of CA, despite any difference between inside and outside of disk position. In identifying disk deformities in the TMJ, Heffez and Jordan [32] categorized disk configurations as shapes (e.g., bow-tie, straight, funnel, bulge, and Y shapes) using cephalometric arthrograms and histopathologic sagittal sections. Using MRI, Murakami et al .…”

Section: Discussionmentioning

confidence: 99%

Analysis of Magnetic Resonance Images of Disk Positions and Deformities in 1,265 Patients with Temporomandibular Disorder

Choi¹,

Asaumi²,

Hisatomi³

et al. 2009

TODENTJ

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ObjectivesTo compare MRI manifestations according to gender and age and to identify correlations between clinical manifestations and MRI findings in patients with temporomandibular disorder (TMD) as based on a large series.Materials and MethodsFat suppressed oblique sagittal images of the open and closed mouth were acquired, and MRI scanning parameters were applied.Results The patients consisted of 946 females (average, 36.6 years old), and 319 males (average, 34.3 years old). In all TMD patients, 945 had symptoms in the unilateral temporomandibular joint (TMJ) and 320 in the bilateral TMJ. There were significant differences in the distribution of disk positions based on age, regardless of gender, in the unilaterally and bilaterally symptomatic groups; however, the results were not significant in the asymptomatic group. There were significant differences with respect to the distribution of disk positions between males and females in asymptomatic group and in the unilaterally symptomatic group, although the bilaterally symptomatic group did not show significant differences in this regard. As regards the disk positions in the joints of the three groups (asymptomatic group, unilaterally and bilaterally symptomatic groups), there were significant interactive effects of disk positions, regardless of gender. There were statistically significant age-related differences in disk deformities in all symptom groups, regardless of gender, except for in the group of males lacking symptoms in either joint. As regards disk deformities among the three groups studies here, there were significant interactive effects for disk positions, regardless of gender.

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Section: Discussionmentioning

confidence: 99%

Analysis of Magnetic Resonance Images of Disk Positions and Deformities in 1,265 Patients with Temporomandibular Disorder

Choi¹,

Asaumi²,

Hisatomi³

et al. 2009

TODENTJ

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“…Such anterior displacement occurs mostly in the anteromedial direction. The anatomic reason for this displacement orientation is the direction of the pull exerted by the lateral pterygoid muscle attached to the anterior joint capsule: in an already affected band complex, the force vector of this muscle, which pulls down the articular disc from the condyle head toward antedient als Kriterium die Relation von der Intermediärzone des Diskus zum anterioren und superioren Pol des Kondylus sowie zum mechanischen Drehpunkt der Unterkieferbewegungen [14,15,35,36]. Beim so genannten "Uhrzeigermodell" wird der Grad der Diskusverlagerung in der jeweiligen sagittalen Schicht bestimmt [51].…”

Section: Disc Displacementunclassified

“…There are many classifications in the literature with which to assess displaced discs: one criterion is the relationship between the disc's intermediate zone and the anterior and superior pole of the condyle, as well as the mechanical point of rotation involved in mandible movements [14,15,35,36]. The "dial-hand model" determines the extent of disc displacement in the relevant sagittal slice [51], taking as anatomic points of reference the articular disc's posterior border and the condyle's greatest superior and anterior circumference.…”

Section: Visuelle Befundung Der Magnetresonanztomographischen Aufnahmenmentioning

confidence: 99%

Disc-condyle Relationships during Class II Treatment with the Functional Mandibular Advancer (FMA)

Kinzinger

Gülden²,

Roth³

et al. 2006

J Orofac Orthop

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Functional jaw orthopedics for correction of skeletal Class II with the rigid fixed FMA leads to side-effects reflected in the disc-condyle relationship in the temporomandibular joints: no adverse effects were observed in joints presenting an initial physiological disc-condyle relationship, whereas the disc position may improve in joints with initial partial or total anterior disc displacement. In comparison with the baseline findings, we observed no post-treatment restriction in the extent of maximum mouth opening, protrusion, and left and right laterotrusion. Maximum active retrusion increased due to the treatment. MR imaging and MSA only partly cover the same aspects of temporomandibular joint diagnostics.

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“…Although we found that biplanar was the most common disc configuration in the ADW group in closed mouth position, when the disc was reduced in open mouth position, the disc was then relocated superiorly to the condylar head with biconcave configuration. On the contrary, Heffez and Jordan [] found that biconcave shape was common for both closed and open mouth positions. Moreover, some studies found that biplanar shape could be found in a nondisplaced disc [,].…”

Section: Discussionmentioning

confidence: 99%

Transformation of temporomandibular joint disc configuration in internal derangement patients using magnetic resonance imaging

Arayasantiparb

Tsuchimochi

Mitrirattanakul

2012

Oral Science International

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Purpose: The normal disc configuration is biconcave; however, the deformed disc can be found in internal derangement (ID) of the temporomandibular joint (TMJ). The purpose of this study was to evaluate the relationship between the transformation patterns of TMJ disc configuration during mouth opening and disc displacement status, disc reduction ability and TMJ clinical symptoms. Methods: TMJ MR images from volunteers and ID patients were analyzed for closed and open mouth positions. MR images of ID patients were classified into 4 groups: symptomatic joint with anterior disc displacement with or without reduction (ADW or ADWo) and asymptomatic joint with ADW or ADWo. The disc configurations in both positions were categorized as biconcave, biplanar, convex or folded; then the patterns of transformation were observed. Results: For the ADW group, the most common disc configuration for closed and open mouth positions were biplanar (66.7%) and biconcave (86.3%). The transformation pattern was significantly related to disc reduction ability (p < 0.05). Conclusions: The transformation patterns of disc configuration during opening were related to anterior disc displacement and disc reduction ability.

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A classification of temporomandibular joint disk morphology

Cited by 35 publications

References 5 publications

Analysis of Magnetic Resonance Images of Disk Positions and Deformities in 1,265 Patients with Temporomandibular Disorder

Analysis of Magnetic Resonance Images of Disk Positions and Deformities in 1,265 Patients with Temporomandibular Disorder

Disc-condyle Relationships during Class II Treatment with the Functional Mandibular Advancer (FMA)

Transformation of temporomandibular joint disc configuration in internal derangement patients using magnetic resonance imaging

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