Pattern of lip competence and its association with malocclusion traits: a retrospective analysis of cases seen at a tertiary institution. Port Harcourt Medical Journal, [S. l.], v. 20, n. 1, p. 39–45, 2026. DOI: 10.60787/phmj.v20i1.250. Disponível em: https://www.phmj.org.ng/index.php/home/article/view/250. Acesso em: 10 apr. 2026.