Different types of braces use different sets and sizes of archwires. Some systems need 5-6 archwires per jaw over the whole course of treatment. Some systems use more archwires and some use fewer. The number of archwires doesn't determine how effective the braces are. The second-to-last and last archwires stay in the mouth the longest. They are known as the ‘working’ and ‘finishing’ archwires respectively. While the working archwire is tied into the braces, the bite is corrected – whether it's a deep bite, open bite, distal bite or underbite. Correcting the bite is one of the slowest stages of treatment, so this archwire may not be changed for a long time. The working archwire can also serve as the finishing archwire, or it can be replaced. Finishing is the final fine-tuning of small irregularities in the position of the teeth that have arisen during the earlier stages of treatment. This can also take a long time – from 2-3 months to 6-7 months or more.
This answer is for general information. Your own case needs an examination by an orthodontist.