This narrative review explores the stability and success of Clear Aligner Therapy (CAT) in orthodontics. CAT, a removable, aesthetic alternative to traditional fixed appliances, has gained popularity due to its convenience and effectiveness in treating mild to moderate malocclusions. The review highlights the biomechanics, indications, contraindications, and limitations of CAT, emphasizing its role in managing cases involving crowding, spacing, and malocclusions. It also discusses the use of auxiliaries and attachments to enhance treatment outcomes for complex cases. The review notes that while CAT is effective for many orthodontic issues, its long-term stability depends on factors such as patient compliance, proper case selection, and the use of advanced technologies. The study also addresses challenges in treating severe rotations, open bites, and deep bites, emphasizing the need for careful planning and the use of supplementary techniques. Additionally, the review discusses the importance of material properties in aligner effectiveness, with multi-layer designs showing improved performance. The conclusion underscores the growing acceptance of CAT in orthodontics, particularly for complex cases, and highlights the need for further research to expand its application and optimize outcomes. The review also emphasizes the role of orthodontic expertise in ensuring successful treatment and long-term stability. Overall, CAT has demonstrated significant potential in orthodontic treatment, although its effectiveness can be influenced by various factors, including patient adherence and the use of advanced technologies.This narrative review explores the stability and success of Clear Aligner Therapy (CAT) in orthodontics. CAT, a removable, aesthetic alternative to traditional fixed appliances, has gained popularity due to its convenience and effectiveness in treating mild to moderate malocclusions. The review highlights the biomechanics, indications, contraindications, and limitations of CAT, emphasizing its role in managing cases involving crowding, spacing, and malocclusions. It also discusses the use of auxiliaries and attachments to enhance treatment outcomes for complex cases. The review notes that while CAT is effective for many orthodontic issues, its long-term stability depends on factors such as patient compliance, proper case selection, and the use of advanced technologies. The study also addresses challenges in treating severe rotations, open bites, and deep bites, emphasizing the need for careful planning and the use of supplementary techniques. Additionally, the review discusses the importance of material properties in aligner effectiveness, with multi-layer designs showing improved performance. The conclusion underscores the growing acceptance of CAT in orthodontics, particularly for complex cases, and highlights the need for further research to expand its application and optimize outcomes. The review also emphasizes the role of orthodontic expertise in ensuring successful treatment and long-term stability. Overall, CAT has demonstrated significant potential in orthodontic treatment, although its effectiveness can be influenced by various factors, including patient adherence and the use of advanced technologies.