© 1987 by European Orthodontic Society
Impaired mandibular function and its possible effect on mandibular growth in juvenile rheumatoid arthritis
Dental Faculty, University of Oslo Norway
Dr. Anne E Stabrun Dental Faculty, Department of Orthodontics Geitmyrsvn. 71 0455 Oslo 4 Norway
Condylar translatory capacity of the temporomandibular joint (TMJ) was evaluated in 103 patients with juvenile rheumatoid arthritis (JRA), and in a control group of 55 children without joint disease. Mean age of the patients was 9.0 years, and 9.4 years for the controls. There was a statistically significant difference in translatory capacity between patients and controls, as measured on standardized radiographs. There was a significant rank correlation between structural and functional abnormalities in the patients. In unilateral cases the TMJ showed a significantly reduced translation in the affected joint, and to some extent in the healthy one. Translatory capacity among the patients was significantly correlated to maximum mouth opening.
Maximum length of the mandible, as measured on oblique, postero-anterior radiographs, was dependent on body height, structural TMJ abnormalities, sex, duration of disease and age at onset. The study did not allow any conclusions as to the influence of impaired mandibular function upon growth.
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