Analysis of Criteria for MRI Diagnosis of TMJ Disc Displacement and Arthralgia
Table 1
(a) The relationship of anterior disc displacement, diagnosed by the standard protocol, to arthralgia. (b) The relationship of anterior disc displacement, diagnosed by the alternative protocol, to arthralgia. (c) Comparison of the relationship of anterior disc displacement, standard versus alternative diagnoses, to arthralgia. (d) Comparison of the standard versus alternative diagnoses of anterior disc displacement.
(a)
Standard
Arthralgia
No arthralgia
Total no.
ADD
34
14
48
No ADD
2
8
10
Total no.
36
22
58
ADD: anterior disc displacement, arthralgia: a symptomatic TM joint, no arthralgia: an asymptomatic TM joint; total no. reflects the number of TM joint examined with that finding and diagnosis.
(b)
Alternative
Arthralgia
No arthralgia
Total no.
ADD
23
1
24
No ADD
13
21
34
Total no.
36
22
58
ADD: anterior disc displacement, arthralgia: a symptomatic TM joint, no arthralgia: an asymptomatic TM joint; total no. reflects the number of TM joint examined with that finding and diagnosis.
(c)
Arthralgia
No arthralgia
Total no.
STD ADD
34
14
48
ALT ADD
23
1
24
Total no.
57
15
72
STD ADD: anterior disc displacement using the standard protocol, ALT ADD: anterior disc displacement using the proposed alternative protocol, arthralgia: a symptomatic TM joint, no arthralgia: an asymptomatic TM joint; total no. reflects the number of TM joint examined with that finding and diagnosis.
(d)
STD
ADD
No ADD
Total no.
ALT
ADD
24
0
24
No ADD
24
10
34
Total no.
48
10
58
STD: standard protocol for determining disc displacement, ALT: proposed alternative protocol for determining disc displacement, ADD: anterior disc displacement, arthralgia: a symptomatic TM joint, no arthralgia: an asymptomatic TM joint; total no. reflects the number of TM joint examined with that finding and diagnosis.
