From: Comparison of anchorage reinforcement with temporary anchorage devices or a Herbst appliance during lingual orthodontic protraction of mandibular molars without maxillary counterbalance extraction
Valid subjects (N)
Mean mm/month
SD
Minimum
Maximum
Median
Herbst
15
0.53
0.19
0.89
0.46
TAD
12
0.36
0.15
0.18
0.63
0.34
All Groups
27
0.45