Mattos Bretz, Yasmin, 		Paiva, Saul, 		Bastos Lages, Elizabeth, AND 		Abreu, Lucas.
" Perceptions of pain levels and chewing impairment among adolescents undergoing orthodontic treatment with fixed appliances." <em>Journal of Oral Research</em> [Online], Volume 7 Number 3 (27 March 2018)