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In this case, being reported, non\u2010articular hysterical trismus caused the jaw to lock in an 11\u2010year\u2010old boy for 3 months. During this period the jaw was completely locked and the locking was associated with moderate to severe pain. After three sessions of therapy the patient was able to open his mouth 33\u00a0mm and his eating was back to normal. Conversion disorders often present with dramatic physical presentation including trismus and jaw lock. This report highlights the importance of complete history taking and a thorough clinical examination to make a correct diagnosis in a patient with trismus.<\/jats:p>","DOI":"10.1111\/scd.12860","type":"journal-article","created":{"date-parts":[[2023,4,7]],"date-time":"2023-04-07T08:34:10Z","timestamp":1680856450000},"page":"130-135","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A case of conversion disorder presenting as chronic trismus"],"prefix":"10.1111","volume":"44","author":[{"given":"Robert L.","family":"Merrill","sequence":"first","affiliation":[{"name":"School of Dentistry University of California  Los Angele USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Donald","family":"Goodman","sequence":"additional","affiliation":[{"name":"Clinician UCLA Orofacial Pain Department  Los Angele USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Goli","family":"Chamani","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine Orofacial Pain Clinic Kerman School of Dentistry  Kerman Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2082-5849","authenticated-orcid":false,"given":"Mohammad","family":"Shabani","sequence":"additional","affiliation":[{"name":"Neuroscience Research Center Neuropharmacology Institute Kerman University of Medical Sciences  Kerman Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,4,7]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1988.03410190179046"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/dmcn.12636"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.12968\/denu.2002.29.2.88"},{"key":"e_1_2_8_5_1","first-page":"591","article-title":"Diagnostic and statistical manual of mental disorders","volume":"21","author":"Edition F","year":"2013","journal-title":"Am Psychiatric Assoc"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s13312-015-0589-y"},{"issue":"3","key":"e_1_2_8_7_1","first-page":"861","article-title":"Conversion disorder","volume":"24","author":"Feinstein A","year":"2018","journal-title":"Continuum (Minneap Minn)"},{"issue":"2","key":"e_1_2_8_8_1","first-page":"25","article-title":"Hysterical trismus: review & a case report","volume":"1","author":"Dhanrajani P","journal-title":"Case Rep Dent Sci"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1177\/0333102416686302"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/0030-4220(72)90405-7"},{"issue":"9","key":"e_1_2_8_11_1","first-page":"413","article-title":"Hysterical tismus. 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