{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T04:35:38Z","timestamp":1792643738719,"version":"4.5.0"},"reference-count":29,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2010,10,7]],"date-time":"2010-10-07T00:00:00Z","timestamp":1286409600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Dent Res"],"published-print":{"date-parts":[[2011,5]]},"abstract":"<jats:p>The smile of the famed portrait \u2018The Mona Lisa\u2019 has perplexed both art historians and researchers for the past 500 years. There has been a multitude of theories expounded to explain the nature of the model\u2019s enigmatic smile. The origin of the model\u2019s wry smile can be demonstrated through a careful analysis of both documented facts concerning the portrait\u2014some gathered only recently through the use of modern technology\u2014and a knowledge of the clinical presentation of Bell\u2019s palsy. Bell\u2019s palsy is more prevalent in women who are either pregnant or who have recently given birth. This paper postulates that the smile of the portrait\u2019s model was due to Leonardo da Vinci\u2019s anatomically precise representation of a new mother affected by Bell\u2019s palsy subsequent to her recent pregnancy.<\/jats:p>","DOI":"10.1177\/0022034510384629","type":"journal-article","created":{"date-parts":[[2010,10,7]],"date-time":"2010-10-07T23:52:17Z","timestamp":1286495537000},"page":"580-582","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":8,"title":["Bell\u2019s Palsy"],"prefix":"10.1177","volume":"90","author":[{"given":"W.J.","family":"Maloney","sequence":"first","affiliation":[{"name":"Department of Cariology and Comprehensive Care, College of Dentistry, New York University, 345 E. 24th Street, New York, NY 10010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2010,10,7]]},"reference":[{"key":"bibr1-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1177\/000348948909800306"},{"key":"bibr2-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1002\/lary.1978.88.5.787"},{"key":"bibr3-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1520\/JFS13364J"},{"key":"bibr4-0022034510384629","first-page":"90","volume":"59","author":"Davison JM","year":"1997","journal-title":"Kidney Int Suppl"},{"key":"bibr5-0022034510384629","first-page":"333","volume":"9","author":"Graham JG","year":"1982","journal-title":"Clin Obstet Gynecol"},{"key":"bibr6-0022034510384629","unstructured":"Halsall P (1996). Medieval sourcebook: Giorgio Vasari: life of Leonardo da Vinci 1550. Available at http:\/\/www.fordham.edu\/halsall\/source\/vasari1.html (URL accessed 08\/25\/2010)."},{"key":"bibr7-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1055\/s-2006-947216"},{"key":"bibr8-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1177\/000348947508400402"},{"key":"bibr9-0022034510384629","unstructured":"Judd T (2010). Veil suggests Mona Lisa model was pregnant. The Independent, 2010. Available at http:\/\/license.icopyright.net\/user\/viewFreeUse.act?fuid=NzA1OTY3Mw%3D%3D (URL accessed 08\/25\/2010)."},{"key":"bibr10-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1002\/ana.410200511"},{"key":"bibr11-0022034510384629","doi-asserted-by":"publisher","DOI":"10.3109\/14767050903009255"},{"key":"bibr12-0022034510384629","unstructured":"Livingstone MS (2010). The Neurobiology Department at Harvard Medical School. Available at http:\/\/neuro.med.harvard.edu\/faculty\/livingstone.html (URL accessed 08\/25\/2010)."},{"key":"bibr13-0022034510384629","unstructured":"Lorenzi R (2007). Mona Lisa\u2019s identity revealed. Discovery Channel News 2010. Available at http:\/\/dsc.discovery.com\/news\/2007\/05\/02\/monalisa_arc_print.html (URL accessed 08\/25\/2010)."},{"key":"bibr14-0022034510384629","unstructured":"Louvre (2010). Portrait of Lisa Gherardini, wife of Francesco del Giocondo-Leonardo di ser Pietro Da Vinci. Available at http:\/\/www.louvre.fr\/llv\/oeuvres\/detail_notice.jsp?CONTENT%3C%3Ecnt_id=10134198673226503&CURRENT_LLV_NOTICE%3C%3Ecnt_id=10134198673226503&FOLDER%3C%3Efolder_id=9852723696500816&bmLocale=en (URL accessed 08\/25\/2010)."},{"key":"bibr15-0022034510384629","unstructured":"Medline Plus (2010). Bell\u2019s palsy. Available at http:\/\/www.nlm.nih.gov\/medlineplus\/bellspalsy.html (URL accessed 08\/25\/2010)."},{"key":"bibr16-0022034510384629","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-124-1_Part_1-199601010-00005"},{"key":"bibr17-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1007\/s00404-005-0742-2"},{"key":"bibr18-0022034510384629","unstructured":"National Institute of Neurological Disorders and Stroke (2010). Bell\u2019s palsy fact sheet. Available at http:\/\/www.ninds.nih.gov\/disorders\/bells\/detail_bells.htm?css=print (URL accessed 08\/25\/2010)."},{"key":"bibr19-0022034510384629","unstructured":"No Authors Listed (2010). Leonardo Da Vinci: Renaissance man. Available at http:\/\/www.mos.org\/leonardo\/bio.html (URL accessed 08\/25\/2010)."},{"key":"bibr20-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1080\/000164802760370736"},{"key":"bibr21-0022034510384629","unstructured":"Roberts J (2010). Was Mona Lisa pregnant? CBS News. Available at http:\/\/www.cbsnews.com\/stories\/2006\/09\/27\/world\/main2043887.shtml (URL accessed 08\/25\/2010)."},{"key":"bibr22-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1046\/j.1468-1331.2002.00343.x"},{"key":"bibr23-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1080\/00016489950180577"},{"key":"bibr24-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1093\/qjmed\/95.6.359"},{"key":"bibr25-0022034510384629","doi-asserted-by":"publisher","DOI":"10.1016\/S1071-9091(03)00077-9"},{"key":"bibr26-0022034510384629","first-page":"351","volume":"42","author":"Tsai HS","year":"2009","journal-title":"J Microbiol Immunol Infect"},{"key":"bibr27-0022034510384629","first-page":"89","volume-title":"Lives of the most eminent painters, sculptors, and architects. Translated De Vere G du C","author":"Vasari G","year":"1896"},{"key":"bibr28-0022034510384629","unstructured":"Watt N, Kannampilly A (2010). Is Da Vinci\u2019s Mona Lisa a self-portrait? ABC News. Available at http:\/\/abcnews.go\/print?id=9662394 (URL accessed 08\/25\/2010)."},{"key":"bibr29-0022034510384629","unstructured":"Westall S (2010). German experts crack Mona Lisa smile. Reuters. Available at http:\/\/www.reuters.com\/article\/idUSL1179689520080114 (URL accessed 08\/25\/2010)."}],"container-title":["Journal of Dental Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0022034510384629","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/0022034510384629","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/0022034510384629","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T21:06:41Z","timestamp":1777496801000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/0022034510384629"}},"subtitle":["The Answer to the Riddle of Leonardo da Vinci\u2019s \u2018Mona Lisa\u2019"],"short-title":[],"issued":{"date-parts":[[2010,10,7]]},"references-count":29,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2011,5]]}},"alternative-id":["10.1177\/0022034510384629"],"URL":"https:\/\/doi.org\/10.1177\/0022034510384629","relation":{},"ISSN":["0022-0345","1544-0591"],"issn-type":[{"value":"0022-0345","type":"print"},{"value":"1544-0591","type":"electronic"}],"subject":[],"published":{"date-parts":[[2010,10,7]]}}}