Adolescent 1 Equipment Failure 1 Female Follow-Up Studies 1 Humans 1 Kaplan Meier method 1 Kaplan-Meier Estimate 1 Male 1 Mandible 1 Maxilla 1 Orthodontic Appliance Design 1 Orthodontic Appliances, Fixed 1 Orthodontic Retainers 1 Orthodontics, Corrective 1 Vacuum 1 Young Adult 1 adolescent 1 device failure 1 devices 1 female 1 follow up 1 human 1 male 1 mandible 1 maxilla 1 orthodontic procedure 1 orthodontic retainer 1 orthodontics 1 vacuum 1 young adult 1