Document Detail

Prevalence of bone marrow signal abnormalities observed in the temporomandibular joint using magnetic resonance imaging.
MedLine Citation:
PMID:  8600259     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The purpose of this investigation was to determine the prevalence of bone marrow signal abnormalities in patients referred for temporomandibular joint (TMJ) magnetic resonance imaging (MRI). This investigation was done because of prior studies suggesting that condylar marrow signal abnormalities indicate avascular necrosis. SUBJECTS AND METHODS: Retrospective review was done of 449 consecutive TMJ MR examinations in 415 patients from 1991 to 1994. Examinations were obtained with a surface coil at 1.5 T with routine T1, T2, and T2* images. Condylar marrow signal abnormalities were reviewed and classified into either a bone marrow edema pattern (hypointense T1, hyperintense T2) or a sclerosis pattern (hypointense T1 and hypointense T2). Patients with typical findings of osteoarthritis were excluded from the sclerosis category. RESULTS: Condylar marrow signal abnormalities were present in 37 patients (9%). Twenty-six patients (6%) had the edema pattern, 14 patients (3%) had the sclerosis pattern, and 3 patients had both. Two patients with the edema pattern had a history of surgery; five patients with the sclerosis pattern had a history of surgery. The only follow-up MRIs obtained in the 37 patients were on one patient with edema at 8 months and on one patient with sclerosis at 10 months. MRI demonstrated a stable appearance of these patterns. CONCLUSION: It was concluded that condylar marrow signal abnormalities are not rare in patients referred for TMJ MRI. The clinical significance of the changes is uncertain.
J M Lieberman; C L Gardner; A O Motta; R D Schwartz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons     Volume:  54     ISSN:  0278-2391     ISO Abbreviation:  J. Oral Maxillofac. Surg.     Publication Date:  1996 Apr 
Date Detail:
Created Date:  1996-04-26     Completed Date:  1996-04-26     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8206428     Medline TA:  J Oral Maxillofac Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  434-9; discussion 439-40     Citation Subset:  AIM; D; IM    
University Hospitals of Cleveland, Department of Radiology, OH 44106, USA.
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MeSH Terms
Bone Marrow Diseases / pathology*
Edema / pathology
Magnetic Resonance Imaging
Mandibular Condyle / pathology
Osteonecrosis / pathology
Retrospective Studies
Temporomandibular Joint Disorders / pathology*

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