The relationship between retruded contact position and intercuspal position in patients with TMJ osteoarthritis.
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.
Yamada
Kazuhiro
K
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
Fukui
Tadao
T
Tsuruta
Akemi
A
Hanada
Kooji
K
Hosogai
Akiko
A
Kohno
Shoji
S
Hayashi
Takafumi
T
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