Efficacy of Low-level Laser Acupuncture and Microcurrent Electrical Stimulation on Gag Reflex on Children

Inclusion Criteria: * children free of any systemic disease or special health care needs * children with score 2 or 3 according to the frankle behavioral rating scale * a full arch maxillary alginate impression is needed * moderate to severe gagging according to the gagging severity index * written informed consent of the legal guardian Exclusion Criteria: * children taking anti-emetic drugs * children sensitive to alginate