From: Clinical comparison between Multi-Stranded Wires and Single strand Ribbon wires used for lingual fixed retainers
Treatment
Success
Fail
Mean failure time (month)
95% CI
Twisted wire
113 (81.9%)
25 (18.1%)
23.48
23.14
23.81
Ribbon wire
102 (91.1%)
10 (8.9%)
23.53
23.09
23.97