title: The relationship between retruded contact position and intercuspal position in patients with TMJ osteoarthritis.
abstract: This study was conducted to investigate the relationship between posterior mandibular excursion movement and temporomandibular joint osteoarthntis (TMJ OA) in 25 orthodontic patients with Angle Class I and Class II, using a six degrees-of-freedom measuring device and helical computed tomography. There were significant differences found in three-dimensional length, antero-posterior, absolute latero-medial and supero-inferior incisal, and condylar intercuspal position (IP)-retruded contact position (RCP) slides between bilateral, unilateral, and no condylar bone change groups. With respect to the types of condylar bone change, there were significant differences found in three-dimensional length, antero-postenor, and absolute latero-medial condylar IP-RCP slides between flattening, erosion and osteophyte groups. These results suggest that large three-dimensional, not only incisal but also condylar, IP-RCP slides might be related to the uni-/bilaterality and kind of TMJ pathosis, which might make such slides useful as clinical indices of TMJ OA.
authors: Division of Orthodontics, Dept. of Oral Biological Science, Section for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho-dori, Niigata, 951-8514 Japan. kazuhiro@dent.niigata-u.ac.jp
authors: Kazuhiro
authors: K
authors: Yamada
authors: Tadao
authors: T
authors: Fukui
authors: Akemi
authors: A
authors: Tsuruta
authors: Kooji
authors: K
authors: Hanada
authors: Akiko
authors: A
authors: Hosogai
authors: Shoji
authors: S
authors: Kohno
authors: Takafumi
authors: T
authors: Hayashi
mesh_terms: D000328:Adult; D016302:Centric Relation; D003768:Dental Occlusion, Centric; D005260:Female; D006801:Humans; D007574:Jaw Relation Record; D008297:Male; D008310:Malocclusion / Q000150:complications / Q000503:physiopathology*; D008334:Mandible / Q000503:physiopathology*; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000473:pathology*; D009068:Movement; D010003:Osteoarthritis / Q000150:complications / Q000000981:diagnostic imaging / Q000503:physiopathology*; D015203:Reproducibility of Results; D018709:Statistics, Nonparametric; D013705:Temporomandibular Joint Disorders / Q000150:complications / Q000000981:diagnostic imaging / Q000503:physiopathology*; D036542:Tomography, Spiral Computed