{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T06:33:13Z","timestamp":1792477993226,"version":"4.5.0"},"reference-count":20,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2012,7,16]],"date-time":"2012-07-16T00:00:00Z","timestamp":1342396800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Dental Traumatology"],"published-print":{"date-parts":[[2012,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background\/Aim<\/jats:title><jats:p>Prediction tools are increasingly used to inform patients about the future dental health outcome. Advanced statistical methods are required to arrive at unbiased predictions based on follow\u2010up studies.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and methods<\/jats:title><jats:p>The Internet risk calculator at the Dental Trauma Guide provides prognoses for teeth with traumatic injuries based on the Copenhagen trauma database: <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"http:\/\/www.dentaltraumaguide.org\">http:\/\/www.dentaltraumaguide.org<\/jats:ext-link> The database includes 2191 traumatized permanent teeth from 1282 patients that were treated at the dental trauma unit at the University Hospital in Copenhagen (Denmark) in the period between 1972 and 1991. Subgroup analyses and estimates of event probabilities were based on the Kaplan\u2013Meier and the Aalen\u2013Johansen method.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The Internet risk calculator shows individualized prognoses for the short\u2010 and long\u2010term healing outcome of traumatized teeth with the following injuries: concussion, subluxation, extrusion, lateral luxation, intrusion, avulsion, crown fractures without luxation, root fractures and alveolar fractures. The prognoses for pulp necrosis, pulp canal obliteration, infection\u2010related root resorption, ankylosis, surface resorption, marginal bone loss, and tooth loss were based on the tooth's root development stage and other risk factors at the time of the injury.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This article explains the database, the functionality and the statistical approach of the Internet risk calculator.<\/jats:p><\/jats:sec>","DOI":"10.1111\/j.1600-9657.2012.01161.x","type":"journal-article","created":{"date-parts":[[2012,7,19]],"date-time":"2012-07-19T03:39:08Z","timestamp":1342669148000},"page":"351-357","source":"Crossref","is-referenced-by-count":7,"title":["The dental trauma internet calculator"],"prefix":"10.1111","volume":"28","author":[{"given":"Thomas Alexander","family":"Gerds","sequence":"first","affiliation":[{"name":"Department of Biostatistics University of Copenhagen  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eva","family":"Lauridsen","sequence":"additional","affiliation":[{"name":"Department of Pediatric Dentistry and Clinical Genetics School of Dentistry University of Copenhagen  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S\u00f8ren Steno","family":"Ahrensburg","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillo\u2010Facial Surgery Centre of Rare Oral Diseases Copenhagen University Hospital  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jens Ove","family":"Andreasen","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillo\u2010Facial Surgery Centre of Rare Oral Diseases Copenhagen University Hospital  Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,7,16]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1985.tb00651.x"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1985.tb00583.x"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.2011.01102.x"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.2011.01101.x"},{"key":"e_1_2_5_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.2011.01100.x"},{"key":"e_1_2_5_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.2012.01165.x"},{"key":"e_1_2_5_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/edt.12000"},{"key":"e_1_2_5_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.2006.00422.x"},{"key":"e_1_2_5_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.2006.00423.x"},{"key":"e_1_2_5_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1995.tb00461.x"},{"key":"e_1_2_5_12_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1995.tb00462.x"},{"key":"e_1_2_5_13_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1995.tb00463.x"},{"key":"e_1_2_5_14_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1995.tb00464.x"},{"key":"e_1_2_5_15_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1989.tb00331.x"},{"key":"e_1_2_5_16_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-9657.1988.tb00323.x"},{"key":"e_1_2_5_17_1","first-page":"1993","volume-title":"Statistical Models Based on Counting Processes. 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