{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T21:10:07Z","timestamp":1773695407910,"version":"3.50.1"},"reference-count":41,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2022,2,16]],"date-time":"2022-02-16T00:00:00Z","timestamp":1644969600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2022,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To evaluate the long\u2010term integrity of implant\u2013abutment complexes in implant systems with two internal conical angles.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and Methods<\/jats:title><jats:p>12,538 bone\u2010level implants of two systems placed between January 2012 and December 2018 were retrospectively analyzed. Cumulative abutment\/implant fracture rates in systems with larger (LA, 7.5\u00b0) and smaller (SA, 5.7\u00b0) internal conical angles were estimated using the Kaplan\u2013Meier analysis and compared between groups. The association between implant systems and jammed abutment retrievability was evaluated by multivariable generalized estimating equation logistic regression modeling.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>For LA, the 8\u2010year cumulative incident rate was 0.10% (95% confidence interval (CI): 0\u20130.24%) for implant fracture and 0.26% (95% CI: 0.11%\u20130.41%) for abutment fracture, demonstrating a significant difference in gender (<jats:italic>p<\/jats:italic>\u00a0=\u00a0.03), implant diameter (<jats:italic>p<\/jats:italic>\u00a0=\u00a0.01), jaw (<jats:italic>p<\/jats:italic>\u00a0=\u00a0.006), and antagonist tooth (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.001). For SA, the 8\u2010year cumulative incident rate was 0.38% (95% CI: 0\u20130.79%) for implant fracture and 2.62% (95% CI: 0.05%\u20135.13%) for abutment fracture, which was influenced by implant diameter (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.001) and site (<jats:italic>p<\/jats:italic>\u00a0=\u00a0.03). The cumulative implant\/abutment fracture rate was lower for LA implants, particularly for LA implant\u2010supported single crowns (SCs) (<jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.05). The abutment\u2010retrieval success rate was 92.9% for LA and 57.1% for SA (<jats:italic>p<\/jats:italic>\u00a0=\u00a0.055).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>LA implants exhibited a lower incidence of fracture in abutment\u2013implant complexes and a relatively higher retrievability success rate for jammed abutments.<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.13898","type":"journal-article","created":{"date-parts":[[2022,2,3]],"date-time":"2022-02-03T14:34:28Z","timestamp":1643898868000},"page":"377-390","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["A retrospective study of 12,538 internal conical connection implants focused on the long\u2010term integrity of implant\u2013abutment complexes"],"prefix":"10.1111","volume":"33","author":[{"given":"Xiaoting","family":"Jin","sequence":"first","affiliation":[{"name":"Department of Prosthodontics Stomatology Hospital School of Stomatology Zhejiang University School of Medicine Zhejiang Provincial Clinical Research Center for Oral Diseases Key Laboratory of Oral Biomedical Research of Zhejiang Province Cancer Center of Zhejiang University  Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ye","family":"Guan","sequence":"additional","affiliation":[{"name":"Stomatology Hospital School of Stomatology Zhejiang University School of Medicine Zhejiang Provincial Clinical Research Center for Oral Diseases Key Laboratory of Oral Biomedical Research of Zhejiang Province Cancer Center of Zhejiang University  Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jie","family":"Ren","sequence":"additional","affiliation":[{"name":"Stomatology Hospital School of Stomatology Zhejiang University School of Medicine Zhejiang Provincial Clinical Research Center for Oral Diseases Key Laboratory of Oral Biomedical Research of Zhejiang Province Cancer Center of Zhejiang University  Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanwei","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Zhejiang University  Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoxiang","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering Zhejiang University  Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0302-4492","authenticated-orcid":false,"given":"Fuming","family":"He","sequence":"additional","affiliation":[{"name":"Department of Prosthodontics Stomatology Hospital School of Stomatology Zhejiang University School of Medicine Zhejiang Provincial Clinical Research Center for Oral Diseases Key Laboratory of Oral Biomedical Research of Zhejiang Province Cancer Center of Zhejiang University  Hangzhou China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,2,16]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prosdent.2019.10.014"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/ccr3.2375"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9290(03)00177-5"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prosdent.2018.10.008"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12970"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.msec.2016.10.025"},{"issue":"5","key":"e_1_2_12_8_1","first-page":"e439","article-title":"Influence of different restorative materials on the stress distribution in dental implants","volume":"10","author":"Datte C. 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