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Table 6 Number of failures according to tooth type in the mandible for the .027″ round TMA retainers (41 patients, 82 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 (%) 33 (%) Total (%)
0 (no failures) 31 (75.6%) 28 (68.3%) 59 (71.9%)
1 8 (19.5%) 11 (26.8%) 19 (23.2%)
2 2 (4.9%) 2 (4.9%) 4 (4.9%)
Total number of failures (%) 10 (24.4%) 13 (31.7%) 23 (28.1%)