Magnetic resonance imaging study on temporomandibular joint morphology

Area of Science:

• Radiology
• Dentistry
• Orthodontics

Background:

• Temporomandibular disorders (TMD) pose diagnostic challenges.
• Magnetic resonance imaging (MRI) offers advanced visualization for temporomandibular joint (TMJ) assessment.
• Disc displacement (DD) is a common finding in TMD.

Purpose of the Study:

• To evaluate the diagnostic efficacy of MRI in identifying disc displacement (DD) in temporomandibular joint (TMJ) disorders.
• To compare the prevalence and types of DD in symptomatic versus asymptomatic individuals.
• To investigate the correlation between clinical findings and radiographic evidence of DD in TMD.

Main Methods:

• A study cohort included 40 patients with clinical TMD symptoms and 25 asymptomatic subjects.
• Clinical examinations were performed to assess TMJ status.
• MRI was utilized to confirm and characterize disc displacement (DD) in the temporomandibular joint (TMJ).

Main Results:

• Disc displacement (DD) was diagnosed in 18% of temporomandibular joints (TMJs) in asymptomatic individuals.
• Among symptomatic patients, the prevalence of total DD without reduction was 44.1%.
• Total DD with reduction accounted for 34.9% and partial DD with reduction for 21% of symptomatic TMJs.

Conclusions:

• MRI is effective in diagnosing disc displacement (DD) in temporomandibular joint (TMJ) disorders.
• A significant prevalence of DD exists even in asymptomatic individuals, highlighting the complexity of TMD.
• Further research is needed to elucidate the relationship between clinical presentation and imaging findings in TMJ disorders.