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Table 8 Failures per patient in the mandible and maxilla according to the type of retainer

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

  

Mean (SD)

Median

p25

p50

p75

Mandible

.016″ × .022″ braided SS (N = 47)

2.17 (3.15)

1.0

0

1

3

.027″ TMA (N = 41)

0.66 (1.03)

0

0

0

1

Total (N = 88)

1.47 (2.52)

0.5

0

0.5

2

Maxilla

.016″ × .022″ braided SS 4 incisors (N = 82)

1.14 (2.93)

0

0

0

1

  1. p25 = lower quartile (25%); p75 = upper quartile (75%)