Introduction: Class II sagittal anomalies have a prevalence of between 18-32% of the population. To resolve this type of malocclusion, various therapies have been proposed, some of which involve functional orthodontic or orthopedic appliances. However, it is still a matter of discussion whether the treatments should be started at an early age in patients, or if there are adverse effects that could harm structures of the stomatognathic system. Objective: To analyze the results obtained from early treatment in patients with Class II sagittal malocclusion through a literature review. Materials and methods: An advanced search with terms and connectors was carried out in the Medline via Pubmed and Science Direct databases. Inclusion and exclusion criteria were applied for the definitive selection. Results: Through this search, a total of 5909 articles were collected, of which 23 were consider...