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Advanced Ultrasound Screening for Temporomandibular Joint (TMJ) Internal Derangement
Saul N Friedman1, Miriam Grushka2, Hussam K Beituni3
1Division of Nuclear Medicine, Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, MO 63110, USA.
Radiology Research and Practice
|May 20, 2020
Summary
Advanced ultrasound (US) effectively screens for temporomandibular joint (TMJ) internal derangement with high specificity, though medially displaced discs require further MRI evaluation.
Area of Science:
- Radiology
- Medical Imaging
- Orthopedics
Background:
- Temporomandibular joint (TMJ) internal derangement is a common condition.
- Accurate diagnosis is crucial for effective treatment planning.
- Current diagnostic methods may have limitations.
Purpose of the Study:
- To introduce an advanced ultrasound (US) technique for TMJ internal derangement screening.
- To evaluate the efficacy of this US technique as a diagnostic tool.
Main Methods:
- A novel US probe positioning technique, parallel to the articular disc, was developed.
- Sixty-one patients with suspected TMJ internal derangement underwent US screening.
- Magnetic resonance imaging (MRI) was used for definitive diagnosis and comparison.
Main Results:
- The US technique demonstrated 79% sensitivity and 100% specificity for detecting TMJ disc pathology.
- No false positive results were observed.
- Six false negative results occurred, primarily with medially displaced discs.
Conclusions:
- Ultrasound is a sensitive and specific screening tool for TMJ dysfunction when performed by trained professionals.
- Medially displaced discs may be an exception, requiring MRI confirmation.
- MRI remains essential for surgical planning and definitive diagnosis, especially when medial displacement is suspected.
