Comparative assessment of the efficacy of closed helical loop and T-loop for space closure in lingual orthodontics—a finite element study

Progress in Orthodontics

Table 4 Force (F), moments (M), and M/F ratio on 1 mm activation of T-loop and closed helical loop with compensatory curvature

Loops	Nodes	F (g)	Moment (g mm)	M/F
T-loop	Anterior	105.6	407.62	3.86:1
T-loop	Posterior	72.29	96.87	1.34:1
Closed helical loop	Anterior	143.2	461.11	3.22:1
Closed helical loop	Posterior	100.1	102.11	1.02:1