{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T23:07:11Z","timestamp":1778713631107,"version":"3.51.4"},"reference-count":37,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2012,8,6]],"date-time":"2012-08-06T00:00:00Z","timestamp":1344211200000},"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":[[2013,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Different concepts regarding the number of implants and attachment systems for the preparation of implant\u2010supported over\u2010dentures (<jats:styled-content style=\"fixed-case\">IOD<\/jats:styled-content>s) have been discussed. Nonetheless, long\u2010term results for double\u2010crown\u2010retained<jats:styled-content style=\"fixed-case\">IOD<\/jats:styled-content>s with an observational period of more than 10\u00a0years are still rare in the literature.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>The aim of this practice\u2010based study was to retrospectively evaluate the long\u2010term clinical outcome (success\/survival rates, technical\/biological complications) of<jats:styled-content style=\"fixed-case\">IOD<\/jats:styled-content>s retained by double crowns.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and methods<\/jats:title><jats:p>In a private practice, 36 non\u2010smoking edentulous patients were restored between 1991 and 2002 with double\u2010crown\u2010retained<jats:styled-content style=\"fixed-case\">IOD<\/jats:styled-content>s supported by 2\u20136 implants. For the retrospective evaluation of implant and prosthetic survival (<jats:italic>in\u2010situ<\/jats:italic>criterion) and success (event\u2010free observational period), only those patients were included who regularly (at least once a year) participated in a professional maintenance programme and who had a functional period for the restoration of more than 10\u00a0years.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Twenty\u2010two patients (12 Women\/10 men, mean age 60.1\u00a0\u00b1\u00a09.8\u00a0years) with 89 implants supporting nine maxillary and 13 mandibulary dentures (mean number of implants\/prosthesis\u00a0=\u00a04) met the inclusion criteria. The mean follow\u2010up period was 14.1\u00a0\u00b1\u00a02.8\u00a0years. One implant failed after 4.9\u00a0years (cumulative\u2010survival rate: 98.9%). Seven implants in two patients showed peri\u2010implantitis (prevalence: patient\u2010based\u00a0=\u00a09.1%\/implant\u2010based\u00a0=\u00a08%). Five dentures were renewed (prosthetic\u2010survival rate 77.3% Maintenance procedures (i.e. screw loosening or acrylic fractures) were required at a rate of 0.31\/year and patient.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study indicates that<jats:styled-content style=\"fixed-case\">IOD<\/jats:styled-content>s retained with double crowns offer predictable long\u2010term performance with a limited incidence of biological and technical complications.<\/jats:p><\/jats:sec>","DOI":"10.1111\/j.1600-0501.2012.02568.x","type":"journal-article","created":{"date-parts":[[2012,8,7]],"date-time":"2012-08-07T03:53:14Z","timestamp":1344311594000},"page":"1281-1287","source":"Crossref","is-referenced-by-count":43,"title":["Long\u2010term results of implant\u2010supported over\u2010dentures retained by double crowns: a practice\u2010based retrospective study after minimally 10\u00a0years follow\u2010up"],"prefix":"10.1111","volume":"24","author":[{"given":"Eberhard","family":"Frisch","sequence":"first","affiliation":[{"name":"Dental Practice Hofgeismar Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dirk","family":"Ziebolz","sequence":"additional","affiliation":[{"name":"Department of Preventive Dentistry, Periodontology and Cariology University Medical Center Goettingen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sven","family":"Rinke","sequence":"additional","affiliation":[{"name":"Dental Practice Hanau Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2012,8,6]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"195","article-title":"Prosthodontic complications with implant overdentures: a systematic literature review","volume":"3","author":"Andreiotelli M.","year":"2010","journal-title":"International Journal of 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