From: “Clinical comparison of bond failure rate between two types of mandibular canine-canine bonded orthodontic retainers- a randomized clinical trial”
Type of retainer
No. of subjects
No. of teeth bonded
Frequency of bond failure (%)
Significance
(P-value)*
FRC
26
156
67 (42.94%)
0.012
MSW
49 (31.41%)
Total
52
312
116 (37.17%)