{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T17:32:11Z","timestamp":1773595931851,"version":"3.50.1"},"reference-count":0,"publisher":"Georg Thieme Verlag KG","issue":"01","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Knee Surg"],"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Patellar dislocation is a relatively common knee injury and can be challenging to diagnose. We describe an arthroscopic finding we noted in recurrent patellar dislocation. Arthroscopic photos were evaluated from 50 knees with a history patellar dislocation and 100 control patients. We quantified the amount of patellar subluxation seen on a single arthroscopic view and coined it Empty Sunrise Sign if the patella did not overlap the trochlea. Empty Sunrise Sign was found in 82% of 50 cases with recurrent patellar dislocation and none of the 100 control cases. The finding was 100% specific for identifying a recurrent patellar dislocator. High interobserver agreement was noted. Empty Sunrise Sign suggests significant capsular laxity. This may need to be considered in the surgical treatment of recurrent patellar dislocation.<\/jats:p>","DOI":"10.1055\/s-0038-1676350","type":"journal-article","created":{"date-parts":[[2018,12,13]],"date-time":"2018-12-13T23:56:05Z","timestamp":1544745365000},"page":"089-093","source":"Crossref","is-referenced-by-count":1,"title":["Empty Sunrise Sign: An Arthroscopic Finding in Recurrent Patellar Dislocation"],"prefix":"10.1055","volume":"33","author":[{"given":"Craig","family":"Smith","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Mount Carmel Health System, Columbus, Ohio"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeffrey","family":"Otte","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Mount Carmel Health System, Columbus, Ohio"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Steensen","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Mount Carmel Health System, Columbus, Ohio"},{"name":"Orthopedic ONE, Hilliard, Ohio"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2018,12,13]]},"container-title":["The Journal of Knee Surgery"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.thieme-connect.de\/products\/ejournals\/pdf\/10.1055\/s-0038-1676350.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,1,2]],"date-time":"2020-01-02T23:37:39Z","timestamp":1578008259000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.thieme-connect.de\/DOI\/DOI?10.1055\/s-0038-1676350"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,12,13]]},"references-count":0,"journal-issue":{"issue":"01","published-online":{"date-parts":[[2020,1,2]]},"published-print":{"date-parts":[[2020,1]]}},"URL":"https:\/\/doi.org\/10.1055\/s-0038-1676350","relation":{},"ISSN":["1538-8506","1938-2480"],"issn-type":[{"value":"1538-8506","type":"print"},{"value":"1938-2480","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,12,13]]}}}