Orthodontic retention is defined as keeping teeth in an optimal aesthetic and functional position after orthodontic treatment. Retention is important and necessary because it enables maturation of the newly formed bone, reorganization and adaptation of gingival fibers and periodontal ligaments, enables proper neuromuscular adaptation, reduces the negative effects of continuous growth on the new occlusion to a certain degree, provides proper stability after active orthodontic treatment. There are several types of retention, the most common of which are: multistrand retainer wire, flexible chain wire, CAD/CAM nickel-titanium retainer, rigid support attached only to canines (canine-to-canine), reinforced fibers. Most often, fixed retainers are safe and reliable, however, there are some emergency situations that may require quick and urgent intervention by a dentist or orthodontist, such as when the fixed retainer becomes partially or completely detached. The main disadvantage of all fixed retainers is the difficulty of maintaining oral hygiene in the interdental spaces. The use of dental floss over the contact between the teeth using a device for threading it, floss with threads that already have a rigid part for interdental threading, or interdental brushes is recommended.