{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:48:12Z","timestamp":1790765292846,"version":"4.1.0"},"reference-count":72,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2022,12,15]],"date-time":"2022-12-15T00:00:00Z","timestamp":1671062400000},"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":["Clin Implant Dent Rel Res"],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Choosing four or six implants to support immediate full\u2010arch fixed prostheses (FAFPs) is still controversial worldwide. This study aims to analyze and compare the long\u2010term results of All\u2010on\u20104 and All\u2010on\u20106.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>This retrospective cohort study enrolled 217 patients rehabilitated with 1222 implants supporting 271 FAFPs, including 202 prostheses supported by 4 implants (All\u2010on\u20104 group) and 69 prostheses supported by 6 implants (All\u2010on\u20106 group), and followed up for 3\u201313\u2009years. Implant survival, prosthesis survival, complications, and implant marginal bone loss (MBL) were evaluated and compared between two groups. Patient characteristics including age, gender, jaw, opposite dentition condition, smoking habit, bruxism, bone quantity and quality, cantilever length (CL), prosthesis material, and oral hygiene were analyzed to assess their influence on the clinical results of the two groups. Six surgeons and three prosthodontists who performed FAFPs more than 5\u2009years were invited for questionnaires, to assess patient\u2010 and clinician\u2010related influences on implant number.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Result<\/jats:title>\n                    <jats:p>\n                      In general, All\u2010on\u20104 group indicated no significant difference with All\u2010on\u20106 group in the implant survival (implant\u2010level: hazard ratio [HR]\u00a0=\u00a01.0 [95% confidence interval (CI): 0.8\u20131.2],\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a00.96; prosthesis\u2010level: HR\u00a0=\u00a00.8 [95% CI: 0.3\u20131.8],\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a00.54), prosthesis survival (odds ratio [OR]\u00a0=\u00a00.8 [95% CI: 0.3\u20132.8],\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a00.56), biological complications (OR\u00a0=\u00a00.9 [95% CI: 0.5\u20131.8],\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a00.78), technical complications of provisional prosthesis (OR\u00a0=\u00a01.3 [95% CI: 0.7\u20132.3],\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a00.42), technical complications of definitive prosthesis (OR\u00a0=\u00a01.1 [95% CI: 0.6\u20132.2],\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0=\u00a00.33) and the 1st, 5th, and 10th year MBL (\n                      <jats:italic>P\u2009=<\/jats:italic>\n                      \u00a00.65,\n                      <jats:italic>P\u2009=<\/jats:italic>\n                      \u00a00.28,\n                      <jats:italic>P\u2009=<\/jats:italic>\n                      \u00a00.14). However, for specific covariates, including elderly patients, opposing natural\/fixed dentition, smoking, bruxism, long CL, low bone density, and all acrylic provisional prostheses, All\u2010on\u20106 was more predictable in some clinical measurements than All\u2010on\u20104. The implant prosthodontists and the medium\u2010experienced clinicians showed significant preference for All\u2010on\u20106 (\n                      <jats:italic>P\u2009&lt;<\/jats:italic>\n                      \u00a00.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Based on this study, the long\u2010term clinical results showed no significant difference between All\u2010on\u20104 and All\u2010on\u20106 groups in general. However, for some specific characteristics, All\u2010on\u20106 seemed to be more predictable in some clinical measurements than All\u2010on\u20104. For the clinicians' decision\u2010making, medium\u2010experienced clinicians and the implant prosthodontists showed significant preference for All\u2010on\u20106.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/cid.13170","type":"journal-article","created":{"date-parts":[[2022,12,16]],"date-time":"2022-12-16T00:39:46Z","timestamp":1671151186000},"page":"381-397","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Comparison of 4\u2010 or 6\u2010implant supported immediate full\u2010arch fixed prostheses: A retrospective cohort study of 217 patients followed up for 3\u201313\u2009years"],"prefix":"10.1111","volume":"25","author":[{"given":"Yan","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Oral Implantology Peking University School and Hospital of Stomatology  Beijing People's Republic of 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USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ye","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Oral Implantology Peking University School and Hospital of Stomatology  Beijing People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,12,15]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12380"},{"issue":"4","key":"e_1_2_11_3_1","first-page":"495","article-title":"Ten\u2010year results for Branemark implants immediately loaded with fixed prostheses at implant placement","volume":"12","author":"Schnitman PA","year":"1997","journal-title":"Int J Oral Maxillofac 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