|Baltic Dental and Maxillofacial Journal|
December, 2004, Vol. 6, No. 4
© 2004 Stomatologija
Stomatologija 2004; 6 (4): 99-102 164 KB
Magnetic Resonance Imaging Findings of the Temporomandibular Joint Internal Derangement in a Non-patient Population
Giedre Kobs, Olaf Bernhardt, Thomas Kocher, Georg Meyer
Objectives. To describe the prevalence of internal derangement of the temporomandibular joint (TMJ) in subjects from a population representative cross-sectional study through the distribution of frequency of the data obtained from MRI findings.
Material and methods. 114 subjects with at least one sign of temporomandibular disorders (tenderness/pain on palpation of the joints or muscles, TMJ sounds, pain or deviation during maximum mouth opening (active/passive)) and 193 controls underwent MRI after proper history taking and assessment of clinical symptoms.
Results. 464 joints with no disk displacement (NDD), 114 joints with reducible displaced disk (RDD), and 36 joints with permanently displaced disk (PDD) were confirmed on magnetic resonance imaging (MRI). Pathological TMJ states such as partially and medially disk displacement with complete reposition and retroplaced condyle were the most frequent forms of the internal derangement of the temporomandibular joint.
Conclusion. The results of this study confirm the concept that musculoskeletal abnormality may not be related to patients’ symptoms.
Key words: temporomandibular joint; temporomandibular disorders; internal derangement; clinical examination; magnetic resonance imaging.
Received: 15 11 2004
Accepted for publishing: 22 12 2004
1Institute of Odontology, Faculty of Medicine, Vilnius University, Lithuania.
2Department of Restorative Dentistry, Periodontology and Pediatric Dentistry, University of Greifswald, Germany.
3Department of Periodontology and Pediatric Dentistry, University of Greifswald, Germany.
Olaf Bernhardt2 - D.D.S., PhD, assistant professor, assistant medical director.
Thomas Kocher3 - D.D.S., PhD, dr.hab.med., professor and Head of Department.
George Meyer2 - D.D.S., PhD, dr.hab.med., professor and Head of Department.