Condylar Motion in Patients with Reduced Anterior Disc Displacement

• Published in: Journal of dental research 2001-05, Vol.80 (5), p.1430-1435
• Main Authors: Miyawaki, S., Tanimoto, Y., Inoue, M., Sugawara, Y., Fujiki, T., Takano-Yamamoto, T.
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Analysis of Variance; Case-Control Studies; Dentistry; Female; Humans; Jaw Relation Record; Joint Dislocations - physiopathology; Male; Mandibular Condyle - physiopathology; Mastication; Movement; Temporomandibular Joint Disc - physiopathology; Temporomandibular Joint Disorders - physiopathology
• ISSN: 0022-0345; 1544-0591
• DOI: 10.1177/00220345010800050901

The influence of reduced anterior disc displacement on condylar motion has not been fully examined in young adults. Reduced anterior disc displacement was hypothesized to inhibit condylar motion. Using a six-degrees-of-freedom jaw-tracking system, we recorded bilateral condylar motion during maximum open-close jaw movement and gum-chewing on both sides in ten young adults with unilateral reduced anterior disc displacement and in ten control subjects without temporomandibular disorders. The bilateral condylar motion during both maximum open-close jaw movement and chewing on the disc-displacement side was inhibited in the test group. The condylar motion on the disc-displacement side during chewing on the non-disc-displacement side was also inhibited in the test group. These results suggest that the limitation of condylar motion on the disc-displacement side may influence condylar motion on the non-disc-displacement side during maximum open-close jaw movement, and mastication on the disc-displacement side in young adults.