Evaluation of the presence of bone marrow edema, effusion and osteoarthrosis in TMJs with displacement disc by nuclear magnetic resonance

Abstract

Considering the importance of the image diagnosis associated with the clinical examination in the patient’s evaluation with temporomandibular disorders, the aim of this research was to investigate, through nuclear magnetic resonance images (RMN), the relationship of disc displacement with the intramedullar bone edema, effusion and osteoarthrosis of temporomandibular joint (TMJ). For this, it was evaluated 65 TMJs of the 37 adults subjects, of both gender, with clinical diagnosis of temporomandibular disorders and radiographic of the displacement disc. The results showed the presence of osteoarthrosis in 26,3%, effusion in 33,7% and edema in 16,8% of the cases. The osteoarthrosis was presented in 70,6% of the TMJs with displacement disc without reduction and in only 12,5% displacement with reduction. Furthermore, there was no significant relationship between anatomic displacement disc and the pathologies. This variability showed the importance of the RMN diagnosis for differential treatment for each case. Key words: Temporomandibular joint. Disc displacement. Intramedullar bone edema. Effusion. Osteoarthrosis.