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| Placement location | Failed | Functional | Total | |||
| n | % | n | % | n | % | |
| Upper anterior | 0 | 0 | 28 | 50.9 | 28 | 50.9 |
| Upper premolar | 0 | 0 | 5 | 9.1 | 5 | 9.1 |
| Upper molar | 0 | 0 | 3 | 5.4 | 3 | 5.4 |
| Lower anterior | 0 | 0 | 4 | 7.3 | 4 | 7.3 |
| Lower premolar | 2 | 3.6 | 3 | 5.5 | 5 | 9.1 |
| Lower molar | 0 | 0 | 10 | 18.2 | 10 | 18.2 |
| Total | 2 | 3.6 | 53 | 96.4 | 55 | 100 |
| X2= 20.755 df=5 P=0.001 | ||||||
