Libri correalti

Bonded fixed retainers are frequently used nowadays as the main—and often the only—retention protocol after orthodontic treatment. The expectations for long-lasting lifetime stability of the occlusion led orthodontists to seek the ultimate retention protocol with minimal patient compliance, including fixed retainers. However, fixed retainers have many disadvantages and risks that should be considered in advance. Different failures of fixed retainers are described and categorized, and the workflow for the retreatment of poor occlusion after relapse, despite the fixed retainers, is described. Three case presentations (open bite, root movement, and maxillomandibular protrusion) are described, and all received clear aligner treatment. A revised retention protocol is suggested. Parole chiave: clear aligners, fixed retainers, retention, stability

Clear aligner treatment is a widely used and extremely popular treatment modality. The types of attachments that should be used and their optimal size, shape and location are the subject of debate among clinicians and in the literature. Different companies have different concepts of attachments. The present authors raise the question of whether so many attachments are truly necessary in all scenarios, outlining two cases that were treated without any attachments at all and seeking to explore the factors that led to their success. Parole chiave: aligner sequence, attachments, simulation