Effect of surgically assisted rapid maxillary expansion on masticatory muscle activity: a pilot study - Sverzut, Cassio Edvard; Martorelli, Karinna; Jabur, Roberto; Petri, Alice Dias; Trivellato, Alexandre Elias; Siéssere, Selma; Regalo, Simone Cecílio Hallak (Annals of Maxillofacial Surgery, 2011)