{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T11:09:16Z","timestamp":1787656156732,"version":"build-2736575974"},"reference-count":42,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2022,9,29]],"date-time":"2022-09-29T00:00:00Z","timestamp":1664409600000},"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":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2022,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To compare clinical and patient\u2010reported outcomes when providing maxillary overdentures on four and six splinted implants placed in the posterior region during a 10\u2010year follow\u2010up period.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Sixty\u2010six edentulous participants with functional maxillary denture complaints and insufficient bone volume to allow implant placement were scheduled for a bone augmentation procedure. After healing, participants were randomized to receive either four or six implants in the posterior maxilla. After 3\u00a0months of osseointegration, a bar overdenture was constructed. Implant survival, overdenture survival, clinical scores, peri\u2010implant bone height changes, and patient satisfaction were assessed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Forty\u2010six participants completed the 10\u2010year follow\u2010up. Implant survival was 100% in the 4\u2010implant group and 96.7% in the 6\u2010implant group. Seven new overdentures were made in the 4\u2010implant group and 12 new overdentures were made in the 6\u2010implant group due to excessive wear of the denture base and teeth. Clinical parameters did not differ significantly between groups. Mean marginal bone loss compared to baseline was 0.41\u2009\u00b1\u20090.37\u2009mm in the 4\u2010implant group and 0.70\u2009\u00b1\u20091.07\u2009mm in the 6\u2010implant group. Overall, patient satisfaction improved significantly, but did not differ between groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>From this 10\u2010year follow\u2010up trial, it was concluded that bar maxillary overdentures on four or six implants in the posterior region of an augmented maxilla resulted in a comparable treatment outcome with high implant survival, limited loss of peri\u2010implant marginal bone, and high patients' satisfaction. (Clinical trial registration number: NTR9729).<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.13997","type":"journal-article","created":{"date-parts":[[2022,9,24]],"date-time":"2022-09-24T11:19:58Z","timestamp":1664018398000},"page":"1147-1156","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Maxillary bar overdentures on four or six posterior implants: 10\u2010year results from a randomized clinical trial"],"prefix":"10.1111","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8318-4113","authenticated-orcid":false,"given":"Wim","family":"Slot","sequence":"first","affiliation":[{"name":"Department of Implant Dentistry, Dental School, University Medical Center Groningen University of 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 Medical Center Groningen University of Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco S.","family":"Cune","sequence":"additional","affiliation":[{"name":"Department of Fixed Prosthodontics, Dental School, University Medical Center Groningen University of Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arjan","family":"Vissink","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillofacial Surgery, University Medical Center Groningen University of Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1702-6031","authenticated-orcid":false,"given":"Henny J. A.","family":"Meijer","sequence":"additional","affiliation":[{"name":"Department of Implant Dentistry, Dental School, University Medical Center Groningen University of Groningen  Groningen The Netherlands"},{"name":"Department of Oral and Maxillofacial Surgery, University Medical Center Groningen University of Groningen  Groningen The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,9,29]]},"reference":[{"key":"e_1_2_10_2_1","first-page":"253","article-title":"Implant\u2010supported overdentures: A longitudinal prospective study","volume":"13","author":"Bergendal T.","year":"1998","journal-title":"The International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/joor.12241"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/jcpe.12013"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12903-021-01572-6"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpor.2018.08.006"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.3758\/BF03203630"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2002.130305.x"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.13034"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365\u20102842.2009.02020.x"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2003.140117.x"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0278\u20102391(96)90257\u20108"},{"key":"e_1_2_10_13_1","first-page":"447","article-title":"Posterior mandibular residual ridge resorption in patients with conventional dentures and implant overdentures","volume":"18","author":"Kordatzis K.","year":"2003","journal-title":"The International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_10_14_1","first-page":"343","article-title":"Implant\u2010supported maxillary overdentures retained with milled bars: Maxillary anterior versus maxillary posterior concept. 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