{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T15:50:03Z","timestamp":1762444203507},"reference-count":33,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2010,4,7]],"date-time":"2010-04-07T00:00:00Z","timestamp":1270598400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2010,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:bold>Objectives: <\/jats:bold> To assess the biological and technical complication rates of single crowns on vital teeth (SC\u2010V), endodontically treated teeth without post and core (SC\u2010E), with a cast post and core (SC\u2010PC) and on implants (SC\u2010I).<\/jats:p><jats:p><jats:bold>Material and methods: <\/jats:bold> From 392 patients with chronic periodontitis treated and documented by graduate students during the period from 1978 to 2002, 199 were reexamined during 2005 for this retrospective cohort study, and 64 of these patients were treated with SCs. Statistical analysis included Kaplan\u2013Meier survival functions and event rates per 100 years of object\u2010time. Poisson regression was used to compare the four groups of crowns with respect to the incidence rate ratio of failures, and failures and complications combined over 10 years and the entire observation period.<\/jats:p><jats:p><jats:bold>Results: <\/jats:bold> Forty\u2010one (64%) female and 23 (36%) male patients participated in the reexamination. At the time of seating the crowns, the mean patient age was 46.8 (range 24\u201366.3) years. One hundred and sixty\u2010eight single unit crowns were incorporated. Their mean follow\u2010up time was 11.8 (range 0.8\u201326.4) years. During the time of observation, 22 biological and 11 technical complications occurred; 19 SC were lost. The chance for SC\u2010V (56) to remain free of any failure or complication was 89.3% (95% confidence interval [CI] 76.1\u201395.4) after 10 years, 85.8% (95% CI 66\u201394.5) for SC\u2010E (34), 75.9% for SC\u2010PC (39), (95% CI 58.8\u201386.7) and 66.2% (95% CI 45.1\u201380.7) for SC\u2010I (39). Over 10 years, 95% of SC\u2010I remained free of failure and demonstrated a cumulative incidence of failure or complication of 34%. Compared with SC\u2010E, SC\u2010I were 3.5 times more likely to yield failures or complications and SC\u2010PC failed 1.7 times more frequently than did SC\u2010E. SC\u2010V had the lowest rate of failures or complications over the 10 years.<\/jats:p><jats:p><jats:bold>Conclusions: <\/jats:bold> While SCs on vital teeth have the best prognosis, those on endodontically treated teeth have a slightly poorer prognosis over 10 years. Crowns on teeth with post and cores and implant\u2010supported SCs displayed the highest incidence of failures and complications.<\/jats:p><jats:p> <jats:bold>To cite this article<\/jats:bold>:\u2028Schmidlin K, Schnell N, Steiner S, Salvi GE, Pjetursson B, Matuliene G, Zwahlen M, Br\u00e4gger U, Lang NP. Complication and failure rates in patients treated for chronic periodontitis and restored with single crowns on teeth and\/or implants\u2028<jats:italic>Clin. Oral Impl. Res<\/jats:italic>. <jats:bold>21<\/jats:bold>, 2010; 550\u2013557.\u2028doi: 10.1111\/j.1600\u20100501.2009.01907.x<\/jats:p>","DOI":"10.1111\/j.1600-0501.2009.01907.x","type":"journal-article","created":{"date-parts":[[2010,4,8]],"date-time":"2010-04-08T02:07:06Z","timestamp":1270692426000},"page":"550-557","source":"Crossref","is-referenced-by-count":31,"title":["Complication and failure rates in patients treated for chronic periodontitis and restored with single crowns on teeth and\/or implants"],"prefix":"10.1111","volume":"21","author":[{"given":"Kurt","family":"Schmidlin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Natascha","family":"Schnell","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stefanie","family":"Steiner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giovanni E.","family":"Salvi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bjarni","family":"Pjetursson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giedre","family":"Matuliene","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcel","family":"Zwahlen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Urs","family":"Br\u00e4gger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niklaus P.","family":"Lang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,4,7]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.1984.55.2.63"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.1992.tb01150.x"},{"key":"e_1_2_6_4_1","first-page":"691","article-title":"A multicenter report on 1'022 consecutively placed ITI implants","volume":"15","author":"Brocard D.","year":"2000","journal-title":"The International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.14219\/jada.archive.2005.0232"},{"key":"e_1_2_6_6_1","first-page":"34","article-title":"5\u2010year follow\u2010up of a prospective clinical study on various types of core restorations","volume":"18","author":"Creugers N.H.","year":"2005","journal-title":"International Journal of Prosthodontics"},{"key":"e_1_2_6_7_1","first-page":"136","article-title":"An 18\u2010year retrospective survival study of full crowns with or without posts","volume":"19","author":"De Backer H.","year":"2006","journal-title":"International Journal of Prosthodontics"},{"key":"e_1_2_6_8_1","first-page":"53","article-title":"Alginate impressions for fixed prosthodontics. 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