From: The influence of bracket type on the external apical root resorption in class I extraction patients - a retrospective study
Characteristics
Conventional
(mean and SD)
Self-ligating
P value
Age
15.21
4.43
15.15
4.52
NS
Sex
Female
23
24
Male
26
25
Treatment duration (mo)
22.10
5.15
20.25
5.11