|
0: intact bonding
|
5
|
14
|
19 (40.4%)
|
5
|
20
|
25 (61%)
|
44 (50%)
|
|
1: full retainer out and rebonded
|
1
|
0
|
1
|
3
|
2
|
5
|
6 (6.8%)
|
|
2: fracture
|
0
|
0
|
0
|
0
|
0
|
0
|
0 (0%)
|
|
3: detachment
|
0
|
10
|
10
|
4
|
3
|
7
|
17 (19.3%)
|
|
4: composite damage
|
5
|
11
|
16
|
1
|
3
|
4
|
20 (22.7%)
|
|
5: retainer replaced by a new retainer
|
0
|
0
|
0
|
0
|
0
|
0
|
0 (0%)
|
|
6: no retainer in situ at T3
|
1
|
0
|
1
|
0
|
0
|
0
|
1 (1.1%)
|
|
7: multiple types of failures at the same time
|
0
|
0
|
0
|
0
|
0
|
0
|
0 (0%)
|
|
Total failures per type of retainer
|
–
|
–
|
28 (59.6%)
|
–
|
–
|
16 (39%)
|
–
|
|
Total failures for both retainers
| |
44 (50%)
|
