Objetivo: Determinar los cambios de la posición e inclinación del incisivo superior y del labio superior postratamiento de ortodoncia de una serie de 3 casos clínicos. Materiales y Métodos: Los 3 casos clínicos reportados corresponden a pacientes adultos los cuales fueron tratados con ortodoncia fija y exodoncias de premolares. Se realizaron las mediciones de la posición del incisivo superior (PIS), la inclinación del incisivo superior (IIS), la posición del labio superior (PLS) y la inclinación del labio superior (ILS) en las radiografías cefalométricas del pretratamiento y postratamiento para la evaluación de los cambios. Resultados: En el caso 1 se halló una variación de -1 mm tanto para la PIS y la PLS, así como una variación de la IIS y la ILS, aunque en diferente magnitud. El caso 2 presentó una variación de 2 mm en la IIS con cambios mínimos en el labio superior...

Orthodontists must fully inform patients about the implications of orthodontic treatment and the subsequent need for retention. This review provides an update on relapse, unwanted movements, and different factors that can cause loss of stability following orthodontic treatment. Since it is difficult to predict which patients will present some degree of loss of stability after treatment, it is essential that they be treated as if they have a high potential for relapse. The present review included a bibliographic search in the main sources of scientific review including Medline via PubMed, Scopus, and the Cochrane library. The search strategy was carried out until May 5, 2022. Only 34 studies fulfilled the selection criteria. Our results showed that maintaining teeth in the correct position following orthodontic treatment is a great challenge for orthodontists. The etiology of relapse is c...

Objective: To determine the changes in the position and inclination of the upper incisor and upper lip after orthodontic treatment in a series of 3 clinical cases. Materials and Methods: The three reported clinical cases correspond to adult patients who were treated with fixed orthodontics and premolar extractions. Measurements of upper incisor position (UIP), upper incisor inclination (UII), upper lip position (ULP), and upper lip inclination (ULI) were performed on pre-treatment and post-treatment cephalometric radiographs for assessment of changes. Results: In the first case a variation of -1 mm was found for both the UIP and the ULP, as well as a variation of the UII and the ULI, although in different magnitude. Case 2 presented a 2 mm variation in the UII with minimal changes in the upper lip (Δ ULP = 0 mm and Δ ULI =-0.5 mm) and in case 3 a 2 mm variation was obtained for both II...