磨牙症患病率的多少取决于如何界定和评估磨牙症。清醒态磨牙症在成人中的患病率据报告为 20%。[2]Lavigne GJ, Khoury S, Abe S, et al. Bruxism physiology and pathology: an overview for clinicians. J Oral Rehabil. 2008;35:476-494.http://www.ncbi.nlm.nih.gov/pubmed/18557915?tool=bestpractice.com夜磨牙症的自我报告:儿童为 14% 至 18%,成人为 8% 至 10%,老人约为 3%。[2]Lavigne GJ, Khoury S, Abe S, et al. Bruxism physiology and pathology: an overview for clinicians. J Oral Rehabil. 2008;35:476-494.http://www.ncbi.nlm.nih.gov/pubmed/18557915?tool=bestpractice.com[9]Lobbezoo F, Aarab G, van der Zaag J. Definitions, epidemiology, and etiology of sleep bruxism. In: Lavigne GJ, Cistulli PA, Smith MT, eds. Sleep medicine for dentists: a practical overview. Chicago, IL: Quintessence Books; 2009:95-100.男女之间差异不大。[2]Lavigne GJ, Khoury S, Abe S, et al. Bruxism physiology and pathology: an overview for clinicians. J Oral Rehabil. 2008;35:476-494.http://www.ncbi.nlm.nih.gov/pubmed/18557915?tool=bestpractice.com
一项来在美国的研究发现,亚裔磨牙症自我报告率为 25%,而非洲裔自我报告率则是 9%。欧洲或拉美裔患病率居中。[10]van der Meulen MJ, Lobbezoo F, Aartman IH, et al. Ethnic background as a factor in temporomandibular disorder complaints. J Orofac Pain. 2009;23:38-46.http://www.ncbi.nlm.nih.gov/pubmed/19264034?tool=bestpractice.com