A headgear is an orthodontic appliance used to correct specific types of malocclusions, such as overbites and underbites. It consists of a metal wire structure that attaches to the back of the teeth and is secured around the head with straps or bands. The headgear applies gentle pressure to the teeth and jawbone, helping to move them into the correct position.Typically, headgear is worn for a specified number of hours each day, often during sleep, and can be removed for eating and brushing. While it may be uncomfortable to wear, headgear can effectively treat certain orthodontic issues.