Retention and relapse in orthodontics explores the critical phase following active orthodontic treatment, focusing on how to maintain tooth alignment and prevent unwanted movement. The book delves into the biological and mechanical factors influencing relapse,types of retainers and evidence-based retention protocols.it also address patient compliance, long team follow up strategies, and the evolving role of digital technology in retention planning. this comprehensive guide serves as an essential resource for orthodontists seeking to ensure stable, lasting treatment outcomes.