{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,7]],"date-time":"2026-09-07T20:31:23Z","timestamp":1788813083485,"version":"build-2803163510"},"reference-count":37,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2022,10,7]],"date-time":"2022-10-07T00:00:00Z","timestamp":1665100800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Clinic Periodontology"],"published-print":{"date-parts":[[2023,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>To evaluate bar\u2010supported maxillary implant overdenture treatment when supported by either four or six implants after 10\u2009years.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Edentulous subjects with maxillary denture complaints and ample bone volume to facilitate implants in the anterior region of the maxilla were planned for implant overdenture treatment, randomized to receive either four implants (<jats:italic>n<\/jats:italic>\u00a0=\u00a025) or six implants (<jats:italic>n<\/jats:italic>\u00a0=\u00a025) and subsequently evaluated after 10\u2009years of function. Outcome variables included peri\u2010implant bone\u2010level changes, implant and overdenture survival, complications, presence of plaque, calculus and bleeding, degree of peri\u2010implant inflammation, probing depth and patient satisfaction. Differences between the groups and between evaluation periods were tested with a Student's <jats:italic>t<\/jats:italic>\u2010test.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Fourteen patients with totally 72 implants were lost to follow\u2010up. Two patients from the six\u2010implant group experienced implant loss (four implants), resulting in 96.1% implant survival in this group versus 100% survival in the four\u2010implant group. Clinical, radiographical and patient\u2010reported outcome measures did not differ statistically significant between the two groups. Patients from both groups were generally quite satisfied with the result after 10\u2009years.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Similar and favourable outcomes are seen in bar\u2010supported maxillary overdentures on either four or six anteriorly placed implants after a 10\u2010year evaluation period.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jcpe.13726","type":"journal-article","created":{"date-parts":[[2022,9,20]],"date-time":"2022-09-20T00:39:50Z","timestamp":1663634390000},"page":"36-44","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Maxillary overdentures supported by four or six implants in the anterior region: 10\u2010year randomized controlled trial results"],"prefix":"10.1111","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8318-4113","authenticated-orcid":false,"given":"Wim","family":"Slot","sequence":"first","affiliation":[{"name":"Dental School, Department of Implant Dentistry University of Groningen, University Medical Center Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3578-7141","authenticated-orcid":false,"given":"Gerry M.","family":"Raghoebar","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillofacial Surgery University of Groningen, University Medical Center Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco S.","family":"Cune","sequence":"additional","affiliation":[{"name":"Dental School, Department of Restorative Dentistry and Biomaterials University of Groningen, University Medical Center Groningen  Groningen The Netherlands"},{"name":"Department of Oral and Maxillofacial Surgery, Prosthodontics and Special Dental Care University Medical Center Utrecht  Utrecht The Netherlands"},{"name":"Department of Oral and Maxillofacial Surgery, Prosthodontics and Special Dental Care St. Antonius Hospital  Nieuwegein The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arjan","family":"Vissink","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillofacial Surgery University of Groningen, University Medical Center Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1702-6031","authenticated-orcid":false,"given":"Henny J. 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