Comparison of static MRI and pseudo-dynamic MRI in tempromandibular joint disorder patients

측두하악관절장애 환자에서의 static MRI와 pseudo-dynamic MRI의 비교연구

  • Lee, Jin-Ho (Department of Oral and Maxillofacial Radiology, School of Medicine, Eul-Ji University) ;
  • Yun, Kyoung-In (Department of Oral and Maxillofacial Surgery, School of Medicine, Eul-Ji University) ;
  • Park, In-Woo (Department of Oral and Maxillofacial Radiology & Research Institute of Oral Science, College of Dentistry, Kangnung National University) ;
  • Choi, Hang-Moon (Department of Oral and Maxillofacial Radiology & Research Institute of Oral Science, College of Dentistry, Kangnung National University) ;
  • Park, Moon-Soo (Department of Oral Medicine and Diagnosis & Research Institute of Oral Science, College of Dentistry, Kangnung National University)
  • Published : 2006.12.31

Abstract

Purpose: The purpose of this study was to evaluate comparison of static MRI and pseudo-dynamic (cine) MRI in temporomandibular joint (TMJ) disorder patients. Materials and Methods: In this investigation, 33 patients with TMJ disorders were examined using both conventional static MRI and pseudo-dynamic MRI. Multiple spoiled gradient recalled acquisition in the steady state (SPGR) images were obtained when mouth opened and closed. Proton density weighted images were obtained at the closed and open mouth position in static MRI. Two oral and maxillofacial radiologists evaluated location of the articular disk, movement of condyle and bony change respectively and the posterior boundary of articular disk was obtained. Results: No statistically significant difference was found in the observation of articular disk position, mandibular condylar movement and posterior boundary of articular disk using static MRI and pseudo-dynamic MRI (P<0.05). Statistically significant difference was noted in bony changes of condyle using static MRI and pseudo-dynamic MRI (P<0.05). Conclusion: This study showed that pseudo-dynamic MRI didn't make a difference in diagnosing internal derangement of TMJ in comparison with static MRI. But it was considered as an additional method to be supplemented in observing bony change.