Appliances that are fixed or fitted onto to the teeth by the operator & cannot be removed by the patient at will are called fixed appliance.
It Can do complex tooth movement Better control over tooth movement Better control of anchorage & extraoral force can be used in conjunction with fixed Eg: Head gears. Doesn’t require pt co-operation Better aligning, detailing & finishing of the occlusion Disadvantages:- Difficult to maintain good oral hygiene More time consuming to fix & adjust More conspicuous and not esthetically pleasing. Requires special training of the operator Patient visit the orthodontist at regular intervals Comparatively expensive.