Introduction:The main objectives of root canal treatment are to provide comfort, function, aesthetics and long-term prevention of re-infection. Endodontic treatment has success rates of between 86% and 98%. Treatment options after initial unsuccessful treatment include non-surgical retreatment, endodontic surgery, dental autotransplantation, intentional reimplantation and extraction. Objective: To review the literature on possible treatments to be performed following conventional endodontic treatment. Methodology: Information was searched in PubMed, SCOPUS and Google Scholar. Key words were used to search for information such as: "non-surgical retreatment", "apical surgery", "apicectomy", "autotransplantation", "intentional reimplantation". Results: Endodontic retreatment is a non-surgical procedure that involves the removal of previous filling materials, followed by cleaning, shaping and filling the canals. Apicoectomy involves surgical treatment of a tooth with a periapical lesion that cannot be resolved by routine endodontic treatment. Autotransplantation is the repositioning of an autogenous tooth at another site to replace teeth. Intentional replantation involves purposefully removing a compromised tooth and replanting the tooth in its socket. Conclusion:The first choice when dental treatment fails is non-surgical retreatment, which will allow the previously treated canal to be cleaned and better results to be obtained. Intentional reimplantation, although not the most appropriate treatment, has been shown to be successful and is considered one of the last treatment options.

Sleep disordered breathing (SDB) leads to pathological changes that lead to increased morbidity and mortality in patients. Objective: To analyze the literature on sleep disordered breathing, its etiology, diagnosis, signs and symptoms and treatment in children. Methodology: Articles on the subject published through the PubMed, SCOPUS and Google Academic databases were analyzed, with an emphasis on the last 5 years. It was carried out with the words "Sleep-Disordered Breathing", "children" "etiology" "diagnosis" "symptoms" "treatment". Results: The etiology of SDB is associated in children with developmental anomalies, craniofacial malformations, syndromes, these lead to airway narrowing that triggers adenotonsillar hypertrophy and shortness of breath. Polysomnography is found as an effective and most used diagnostic test, however in very young children or with severe diseases additional studies are needed with a pediatric otolaryngologist, other tests are pulse oximetry or questionnaires. There are nighttime symptoms such as shortness of breath, night sweats, sleep irregularities and snoring, those present during the day are summarized as lack of performance, poor performance, moodiness, hyperactivity. Together they result in signs of malocclusion and altered facial development. Tonsillectomy or adenoidectomy is the most effective treatment in patients with SDB, this is complemented with orthodontic treatment and functional appliances improve the quality of life of patients. Conclusion:It is of great importance to diagnose and treatment SDB because it causes alterations in the development of facial growth and in the quality of life of pediatric patients.

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