Wilkes classification

Question 1

clinical exam - Painless clicking, No restricted motion, no locking

Answer 1

Stage I, Early internal derangement

Question 2

clinical exam - Occasional painful clicking, Intermittent locking,
Headaches

Answer 2

Stage II, early/intermediate internal derangement

Question 3

clinical exam - Frequent pain,
Joint tenderness, 
headaches,
Locking,
 Restricted motion, 
Painful chewing

Answer 3

Stage III, intermediate internal derangement

Question 4

clinical exam - Chronic pain,
headache
Restricted motion with crepitus

Answer 4

Stage IV, intermediate/late internal derangement

Question 5

clinical exam - Variable pain

Joint crepitus

Answer 5

Stage V, late internal derangement

Question 6

imaging - Slight anterior disc displacement that reduces on opening, normal osseous contours

Answer 6

Stage I, Early internal derangement

Question 7

imaging - Slight anterior disc displacement that reduces upon opening, Early disc deformity, Normal osseous contours

Answer 7

Stage II, early/intermediate internal derangement

Question 8

imaging - Anterior disc displacement, reducing early progressing to non-reducing* late Moderate disc deformity
Normal osseous contours

Answer 8

Stage III, intermediate internal derangement

Question 9

imaging - Anterior disc displacement that does not recapture on opening;
Marked disc deformity;
degenerative osseous changes

Answer 9

Stage IV, intermediate/late internal derangement

Question 10

imaging - Anterior disc displacement, non-reducing;
Marked disc deformity;
degenerative osseous changes

Answer 10

Stage V, late internal derangement

Question 11

surgical - Normal disc form;

Slight anterior displacement

Answer 11

Stage I, Early internal derangement

Question 12

surgical - Anterior disc displacement; Thickened disc

Answer 12

Stage II, early/intermediate internal derangement

Question 13

surgical - Disc deformed & displaced ;
Variable adhesions
No bone changes

Answer 13

Stage III, intermediate internal derangement

Question 14

surgical -
Disc perforation, displacement, and adhesions
Degenerative changes in condyle and/or fossa

Answer 14

Stage IV, intermediate/late internal derangement

Question 15

surgical - disc perforation, displacement, and adhesions;

degenerative changes in condyle and/or fossa

Answer 15

Stage V, late internal derangement