Characteristics of Cine-MRI and condylar movement trajectory of asymptomatic subjects with anterior disc displacement of temporomandibular joint

ZHENG Hong ZHANG Zhi-guang ZHANG Song-mei XUE Peng*

doi:10.16098/j.issn.0529-1356.2017.06.014

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Acta Anatomica Sinica ›› 2017, Vol. 48 ›› Issue (6) : 715-720. DOI: 10.16098/j.issn.0529-1356.2017.06.014

Anatomy

Characteristics of Cine-MRI and condylar movement trajectory of asymptomatic subjects with anterior disc displacement of temporomandibular joint

ZHENG Hong¹ ZHANG Zhi-guang²ZHANG Song-mei³ XUE Peng ^4*

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Abstract

Objective The initial anterior disc displacement with reduction of temporomandibular joint can be asymptomatic, however the condylar movement trajectory can help early detection of occult temporomandibular joint internal disorders. Methods Appling Cine-MRI and ARCUSdigma system to investigate 30 asymptom temporomandibular joints in open-close movement. Results Ten anterior displacement discs were detected in some asymptom temporomandibular joints, temporomandibular joint discs showed biconcave shape in anterior displacement disc with reduction (ADDwR) individuals, but slightly thickness and anterior displacement, disc-condyle position returned to normal during small opening (<2 cm); In the group of anterior disc displacement with reduction without any symptom, the condyle tracking was found bounce, inflexion and asymmetry and some of incisor tracking were smooth and superposition and others showed segregated curves; The range of opening movement and maximal value of condylar movement and incisor movement respectively were (13.6±3.7) mm and (40.5±3.4) mm respectively. Conclusion The condylar movement trajectory could indirectly detect the changes of shapes and position of articular disc of temporomandibular joint during opening movement, which is helpful to diagnosis early ADDwR without symptom.

Key words

Temporomandibular joint / Cine-MRI / ARCUSdigma / Human

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ZHENG Hong ZHANG Zhi-guang ZHANG Song-mei XUE Peng. Characteristics of Cine-MRI and condylar movement trajectory of asymptomatic subjects with anterior disc displacement of temporomandibular joint[J]. Acta Anatomica Sinica. 2017, 48(6): 715-720 https://doi.org/10.16098/j.issn.0529-1356.2017.06.014

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