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Table 5 Number of failures according to tooth type in the mandible for the .016″ × .022″ braided SS retainers (47 patients, 282 total bonded sites)

From: Survival of maxillary and mandibular bonded retainers 10 to 15 years after orthodontic treatment: a retrospective observational study

Number of failures 43 (%) 42 (%) 41 (%) 31 (%) 32 (%) 33 (%) Total (%)
0 (no failures) 38 (80.9%) 35 (74.5%) 34 (72.4%) 30 (63.9%) 33 (70.3%) 42 (89.4%) 212 (75.1%)
1 7 (14.9%) 6 (12.8%) 11 (23.4%) 11 (23.4%) 11 (23.4%) 4 (8.5%) 50 (17.7%)
2 1 (2.1%) 5 (10.6%) 1 (2.1%) 3 (6.4%) 3 (6.3%) 1 (2.1%) 14 (5.0%)
3 1 (2.1%) 1 (2.1%) 0 (0%) 1 (2.1%) 0 (0%) 0 (0%) 3 (1.1%)
4 0 (0%) 0 (0%) 1 (2.1%) 1 (2.1%) 0 (0%) 0 (0%) 2 (0.7%)
7 0 (0%) 0 (0%) 0 (0%) 1 (2.1%) 0 (0%) 0 (0%) 1 (0.4%)
Total number of failures (%) 9 (19.1%) 12 (25.5%) 13 (27.6%) 17 (36.1%) 14 (29.7%) 47 (10.6%) 70 (24.9%)