Clinical and MRI findings Group A

(n = 23)
Group AL

(n = 14)
Mouth opening in mm (Mean [SD])
Without pain 28 (1.7) 27 (1.4)
Maximum assisted 36 (1.7) 35 (1.8)
CPI (Mean [SD]) 6.15 (0.31) 6.97 (0.34)
Disc displacement without reduction
Unilateral 15 9
Bilateral 8 5
Disc deformation
Unilateral 11 7
Bilateral 10 6
Joint effusion
Unilateral 7 8
Bilateral 7 3
Hard tissue changes
Unilateral 10 7
Bilateral 7 5

n = number of patients; MRI = magnetic resonance imaging; A = anaesthesia; AL = anaesthesia and lavage; CPI = characteristic pain index; SD = standard deviation.
Numbers of patients are given for MRI findings. No significant differences were found between the groups in any of the measures.