title: MR evidence of characteristics in symptomatic osteoarthritis of the temporomandibular joint: increased signal intensity ratio on proton density-weighted images of bone marrow in the mandibular condyle.
abstract: The purpose of this study was to clarify the presence of pain and a correlation between pain and characteristics of signal intensity of mandibular bone marrow in temporomandibular joints (TMJ) with osteoarthritis (OA). A total of 196 joints in 98 patients with TMJ disorders were examined using magnetic resonance imaging (MRI). A pain score and signal intensity on mandibular bone marrow were analyzed in the TMJ with OA. TMJ with OA showed a higher degree of pain compared to those without (p < 0.05). During opening, the joints in the higher signal intensity group showed a significantly higher degree of pain compared to the joints in the lower signal intensity group in those with OA on proton density weighted images (p < 0.05). It was concluded that TMJ with osteoarthritis is related to pain and that a symptomatic osteoarthritic TMJ can accompany bone marrow changes in the condyle, showing an increased signal on proton density weighted images.
authors.affiliation: Dept. of Oral and Maxillofacial Radiology, Tokyo Dental College 1-2-2 Masago, Mihama-ku Chiba 261-8502, Japan. ayayajima@tdc.ac.jp
authors.forename: Aya
authors.initials: A
authors.lastname: Yajima
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Sano
authors.forename: Mika
authors.initials: M
authors.lastname: Otonari-Yamamoto
authors.forename: Takamichi
authors.initials: T
authors.lastname: Otonari
authors.forename: Mai
authors.initials: M
authors.lastname: Ohkubo
authors.forename: Takuya
authors.initials: T
authors.lastname: Harada
authors.forename: Mamoru
authors.initials: M
authors.lastname: Wakoh
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D018771:Arthralgia / Q000209:etiology / Q000473:pathology*; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008335:Mandibular Condyle / Q000473:pathology*; D008875:Middle Aged; D010003:Osteoarthritis / Q000150:complications / Q000473:pathology*; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D013704:Temporomandibular Joint / Q000503:physiopathology; D013705:Temporomandibular Joint Disorders / Q000150:complications / Q000473:pathology*