Condylar displacement between centric relation and maximum intercuspation in symptomatic and asymptomatic individuals.
OBJECTIVE
To measure condylar displacement between centric relation (CR) and maximum intercuspation (MIC) in symptomatic and asymptomatic subjects.


METHODS
The sample comprised 70 non-deprogrammed individuals, divided equally into two groups, one symptomatic and the other asymptomatic, grouped according to the research diagnostic criteria for temporomandibular disorders (RDC/TMD). Condylar displacement was measured in three dimensions with the condylar position indicator (CPI) device. Dahlberg's index, intraclass correlation coefficient, repeated measures analysis of variance, analysis of variance, and generalized estimating equations were used for statistical analysis.


RESULTS
A greater magnitude of difference was observed on the vertical plane on the left side in both symptomatic and asymptomatic individuals (P = .033). The symptomatic group presented higher measurements on the transverse plane (P = .015). The percentage of displacement in the mesial direction was significantly higher in the asymptomatic group than in the symptomatic one (P = .049). Both groups presented a significantly higher percentage of mesial direction on the right side than on the left (P = .036). The presence of bilateral condylar displacement (left and right sides) in an inferior and distal direction was significantly greater in symptomatic individuals (P = .012). However, no statistical difference was noted between genders.


CONCLUSIONS
Statistically significant differences between CR and MIC were quantifiable at the condylar level in asymptomatic and symptomatic individuals.
Weffort
Soo Young Kim
SY
Department of Orthodontics and Dental Pediatrics, Faculty of Dentistry, University of São Paulo, Brazil.
de Fantini
Solange Mongelli
SM
D000293:Adolescent; D000328:Adult; D016302:Centric Relation; D003430:Cross-Sectional Studies; D003725:Dental Articulators; D003768:Dental Occlusion, Centric; D005157:Facial Pain / Q000503:physiopathology; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D007574:Jaw Relation Record; D004204:Joint Dislocations / Q000473:pathology / Q000503:physiopathology; D008297:Male; D008335:Mandibular Condyle / Q000473:pathology* / Q000503:physiopathology; D008410:Masticatory Muscles / Q000503:physiopathology; D016059:Range of Motion, Articular / Q000502:physiology; D012737:Sex Factors; D013705:Temporomandibular Joint Disorders / Q000473:pathology* / Q000503:physiopathology; D014716:Vertical Dimension; D055815:Young Adult