Correlation of MRI and arthroscopic findings with clinical outcome in temporomandibular joint disorders: a retrospective cohort study

Table 1 Scoring system for MRI and arthroscopy

	MRI	Arthroscopy
Discal displacement	Likert	Likert
Anterior	Likert	Likert
• Posterior	Likert	Likert
• Partial	Likert	Likert
• Reduction	Likert	Likert
Discal deformation	Likert	Likert
• Crumpled disc	Likert	Likert
• Rounded disc	Likert	Likert
• Flat disc	Likert	Likert
• Disc perforations	Likert	Likert
Adhesions	Likert	Likert
Joint effusion	Likert	–
Lateral pterygoid muscle anomalies	Likert	–
Pterygoid shadow anomaly	–	Likert
Retrodiscal deformation	Likert	Likert
Glenoid fossa deformation	Likert	Likert
• Chondromalacia grade	–	Grading
Articular eminence deformation	Likert	Likert
• Chondromalacia grade	–	Grading
Condylar deformation	Likert	–
Overall synovitis	–	Likert
Haemorrhagic infiltrations
• Anterior band of the disc	–	Grading
• Posterior band of the disc	–	Grading
• Retrodiscal synovium	–	Grading
• Anterior recess	–	Grading
• Fossa	–	Grading
• Articular eminence	–	Grading
• Medial synovium	–	Grading

Likert scale 1 to 5:
1. Absolutely not
2. Probably not
3. Uncertain
4. Probably yes
5. Absolutely yes
Synovitis Grading
0. Normal, with whitish synovial tissue and wire capillaries
1. Light hypervascularity, with larger capillaries
2. Moderate hypervascularity, with the presence of petechiae
3. Severe hypervascularity, with the presence of broad areas of petechiae/ecchymosis
Chondromalacia Grading
0. Normal, completely smooth, smooth white surface with striations on the surface
1. Surface degeneration
2. Intermediate degeneration, with fibrocartilage with bubbles, but without bone exposure
3. Advanced degeneration, with evident bone exposure throughout the joint
If a variable is not assessed on MRI or arthroscopy, it is indicated with ‘-‘

ISSN: 1746-160X