{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,16]],"date-time":"2026-05-16T16:02:33Z","timestamp":1778947353055,"version":"3.51.4"},"reference-count":30,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2014,10,27]],"date-time":"2014-10-27T00:00:00Z","timestamp":1414368000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Dent Res"],"published-print":{"date-parts":[[2015,1]]},"abstract":"<jats:p>The hypothesis of this 5-y randomized clinical trial was that there would be no significant difference in the satisfaction of edentulous participants with removable complete overdentures attached to 1 or 2 mandibular implants. Secondary aims were to test changes in satisfaction between and within the groups from baseline to 5 y and differences between the groups in implant survival and prosthodontic maintenance over 5 y. Each of the 86 participants (mean age, 67 y) was randomly allocated to receive either 1 implant in the midline (group 1) or 2 implants in the canine areas (group 2) attached to a mandibular overdenture opposing a maxillary complete denture. Satisfaction was self-assessed by participants on a visual analog scale at baseline prior to implants, as well as at 2 mo and 1, 3, and 5 y with implant overdentures, whereas implant survival and prosthodontic maintenance were assessed by clinical examination. After 5 y, 29 participants in group 1 and 33 in group 2 were available, with most dropouts due to death. Satisfaction with the implant denture after 5 y was significantly ( P &lt; 0.001) higher than at baseline in both groups and remained with no significant difference ( P = 0.32) between the groups. No implants failed in group 1 but 5 failed before loading in 4 participants in group 2. Most participants required maintenance or occasionally denture replacement, and although differences between the groups were not statistically significant, group 1 experienced almost twice as many fractured dentures usually adjacent to the implant attachment. We conclude that there were no significant differences after 5 y in satisfaction or survival of implants with mandibular overdentures retained by 1 implant or 2 implants. Additional research is required to confirm long-term treatment effectiveness of single-implant dentures and the implications of prosthetic maintenance with implant overdentures (ClinicalTrials.gov: NCT02117856).<\/jats:p>","DOI":"10.1177\/0022034514554224","type":"journal-article","created":{"date-parts":[[2014,10,28]],"date-time":"2014-10-28T01:13:29Z","timestamp":1414458809000},"page":"36-43","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":102,"title":["A 5-Year Randomized Trial to Compare 1 or 2 Implants for Implant Overdentures"],"prefix":"10.1177","volume":"94","author":[{"given":"S.R.","family":"Bryant","sequence":"first","affiliation":[{"name":"Division of Prosthodontics and Dental Geriatrics, Department of Oral Health Sciences, University of British Columbia, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.N.","family":"Walton","sequence":"additional","affiliation":[{"name":"Division of Prosthodontics and Dental Geriatrics, Department of Oral Health Sciences, University of British Columbia, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.I.","family":"MacEntee","sequence":"additional","affiliation":[{"name":"Division of Prosthodontics and Dental Geriatrics, Department of Oral Health Sciences, University of British Columbia, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2014,10,27]]},"reference":[{"key":"bibr1-0022034514554224","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0528.1998.tb01978.x"},{"key":"bibr2-0022034514554224","first-page":"S117","volume":"22","author":"Bryant SR","year":"2007","journal-title":"Int J Oral Maxillofac Implants"},{"issue":"1","key":"bibr3-0022034514554224","first-page":"163","volume":"25","author":"Cehreli MC","year":"2010","journal-title":"Int J Oral Maxillofac Implants"},{"key":"bibr4-0022034514554224","doi-asserted-by":"crossref","unstructured":"Cohen ME. 2001. 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