RT Journal Article SR Electronic T1 Orofacial Symptoms Related to Temporomandibular Joint Arthritis in Juvenile Idiopathic Arthritis: Smallest Detectable Difference in Self-reported Pain Intensity JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2352 OP 2358 DO 10.3899/jrheum.120437 VO 39 IS 12 A1 PETER STOUSTRUP A1 KASPER D. KRISTENSEN A1 CARLALBERTA VERNA A1 ANNELISE KÜSELER A1 TROELS HERLIN A1 THOMAS K. PEDERSEN YR 2012 UL http://www.jrheum.org/content/39/12/2352.abstract AB Objective. Temporomandibular joint (TMJ) inflammation in patients with juvenile idiopathic arthritis (JIA) may lead to mandibular growth disturbances and interfere with optimal joint and muscle function. Orofacial symptoms are common clinical findings in relation to TMJ arthritis in adolescence. Knowledge about their clinical manifestation is important for TMJ arthritis diagnosis, treatment choice, and outcome evaluation. The aim of our prospective observational study was to evaluate and describe the frequency, the main complaints, and the localization of TMJ arthritis-related orofacial symptoms. The smallest detectable differences (SDD) for minimal, average, and maximal pain were estimated. Methods. Thirty-three patients with JIA and arthritis-related orofacial symptoms in relation to 55 affected TMJ were included in our questionnaire study (mean age 14.11 yrs). Calculation of the SDD was based on a duplicate assessment 45 min after the first questionnaire was completed. Results. The majority of the patients had common orofacial symptoms during mastication and maximal mouth opening procedures. Persistent orofacial symptoms were rare. The TMJ area in combination with the masseter muscle region was the orofacial region where symptoms were most common. The SDD for minimal, average, and maximal pain were between 10 and 14 mm on a visual analog scale. Conclusion. Our study offers new knowledge about TMJ arthritis-related orofacial symptoms that may aid diagnosis and clinical decision-making. We suggest that TMJ arthritis-related orofacial symptoms could be understood as products of the primary TMJ inflammation in combination with secondary myogenic and functional issues.