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Magnetic resonance imaging analysis on the relationship between anterior disc displacement and balancing‐side occlusal contact
Author(s) -
Ohta M.,
Minagi S.,
Sato T.,
Okamoto M.,
Shimamura M.
Publication year - 2003
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.2003.01000.x
Subject(s) - magnetic resonance imaging , displacement (psychology) , orthodontics , dentistry , materials science , nuclear magnetic resonance , medicine , physics , psychology , radiology , psychotherapist
summary The purpose of this study was to evaluate the relationship between balancing‐side occlusal contact patterns and the prevalence of the internal derangement of the temporomandibular joint (TMJ). Forty‐one patients were used for the magnetic resonance image (MRI) analysis of TMJ and occlusal examination. Balancing‐side occlusal contact patterns observed during mandibular lateral excursive movements were classified into the three following categories: group A, simultaneous balancing‐side contact, group B, balancing‐side contact (with clenching only) and Group C, no balancing‐side contact (with or without clenching). By the occlusal examination of 57 sides, 31·6% showed group A, 8·8% showed group B and 59·6% showed group C contact. Group A could not be observed in the patient group with normal disc position. In the disc displacement group, the prevalence of group A, group B and group C were 40·9, 6·8 and 52·3%, respectively. The higher prevalence of simultaneous balancing‐side contact was revealed to be associated with articular disc dislocation.