Pre-emptive analgesia for primary tooth extractions in children: systematic review of literature. SciELO Preprints, 2022. DOI: 10.1590/SciELOPreprints.4843. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/4843. Acesso em: 6 jun. 2026.