Relationship Between Digital Infrared Thermographic Imaging Findings and Status of The Joint on Magnetic Resonance Imaging in Temporomandibular Disorders
Authors
임재형 ; 허종기 ; 김형곤 ; 박광호 ; 민성윤 ; 고원경
Citation
Journal of Korean Association Maxillofacial Plastic Reconstructive Surgery (대한악안면성형재건외과학회지), Vol.26(3) : 272-279, 2004
Digital infrared thermographic imaging ; Temporomandibular disorders ; Magnetic resonance imaging
Abstract
Digital infrared thermographic imaging (DITI) in dentistry is helpful for evaluation of inflammatory disease of maxilla and mandible, temporomandibular disorders, vitality loss of tooth, and injury of the sensory nerve. Diagnostic usefulness of the DITI is obscure. In this study, we are to clarify the facial temperature change according to the temporomandibular joint (TMJ) internal derangement (ID) and the amount of synovial fluid collection within the TMJ. The average temperature of 5 areas on the lateral facial imaging was measured; temporal muscle, temporomandibular joint, cheek, masseter muscle, sternocleidomastoid muscle. TMJ ID was categorized as normal disc position, disc displacement with reduction (DDcR), early state of disc displacement without reduction (DDsR) and late state of DDsR on T1-weighted magnetic resonance imaging (MRI). The amount of synovial fluid collection was divided into not-detected, small, moderate, and large amount on T2-weighted MRI. In unilateral TMJ ID, TMJ area of the DDcR (+0.24degrees C) and masseter muscle area of the early state of DDsR (+0.21degrees C) showed significantly elevated surface temperature. In bilateral TMJ ID, the temperature of masseter muscle area with more severe TMJ ID (-0.21degrees C and -0.19degrees C) was significantly low. The different amount of synovial fluid collection did not show significant temperature difference. Structural disharmonies such as TMJ ID might change the circular activities of the TMJ and surrounding muscular systems. The circular activities might show different features according to the states of the TMJ ID.