Clinical Efficiency of Two Sequences of Orthodontic Wires to Correct Crowding of the Lower Anterior Teeth

Table 1

Arch wires (inches) used in each clinical sequence.

Schedule	Conventional NiTi arch wires	NiTi heat-activated arch wires
First month	.012′′ NiTi
Second month	.016′′ NiTi	.018′′ NiTi heat-activated
Third month	.018′′ NiTi	.016′′   .022′′ NiTi heat-activated
Fourth month	.019′′   .025′′ NiTi
Fifth month	.019′′   .025′′ steel