{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T15:07:30Z","timestamp":1779462450888,"version":"3.53.1"},"reference-count":43,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T00:00:00Z","timestamp":1767312000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,1,2]],"date-time":"2026-01-02T00:00:00Z","timestamp":1767312000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To evaluate the long\u2010term clinical outcomes of quad zygomatic implants (ZIs) as a rescue therapy for patients with failed full\u2010arch implant rehabilitation in the maxilla due to advanced peri\u2010implantitis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and Methods<\/jats:title>\n                    <jats:p>This was a retrospective cohort study of all patients treated with the Quad Zygoma Protocol. Primary outcomes included the ZI survival and success rates, and secondary outcomes, the prosthetic success rate and complications.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The study population included 28 consecutive patients who received 112 ZIs between 2006 and 2024, with a mean follow\u2010up of 8.2\u2009\u00b1\u20094.1\u2009years. In 23 patients, a total of 113 failed conventional implants were removed, and 48 ZIs were immediately placed into the explantation sites. The ZI survival rate was 98.2%, with two ZIs requiring removal due to late complications. The implant success rate was 93.5%, and prosthetic success was achieved in 96.4% of cases. Sinusitis was diagnosed in 8 patients (28.5%) at a mean of 5.92\u2009years postoperatively; all cases were successfully managed medically without implant loss. Soft tissue recession occurred in 9.8% of cases, while oroantral fistula and facial fistula were each observed in 0.9% of implants.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The Quad Zygoma Protocol may represent a reliable and predictable option for the rescue of failed maxillary full\u2010arch implant rehabilitations. Despite a relatively high prevalence of sinusitis, favorable long\u2010term clinical outcomes were achieved with appropriate management.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/clr.70086","type":"journal-article","created":{"date-parts":[[2026,1,3]],"date-time":"2026-01-03T07:15:01Z","timestamp":1767424501000},"page":"413-425","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Rescue Therapy With Quad Zygoma After Failure of Full\u2010Arch Implant Rehabilitation: A Retrospective Study With a Mean Follow\u2010Up of 8\u2009Years"],"prefix":"10.1111","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0231-7151","authenticated-orcid":false,"given":"Shengchi","family":"Fan","sequence":"first","affiliation":[{"name":"Oral Surgery and Implantology, Faculty of Medicine and Health Sciences University of Barcelona  Barcelona Spain"},{"name":"Department of Oral and Maxillofacial Surgery, Plastic Operations University Medical Center Mainz  Mainz Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8158-253X","authenticated-orcid":false,"given":"Wenjie","family":"Zhou","sequence":"additional","affiliation":[{"name":"Second Dental Center, Ninth People's Hospital Shanghai Jiao Tong University, School of Medicine  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8665-5803","authenticated-orcid":false,"given":"Bilal","family":"Al\u2010Nawas","sequence":"additional","affiliation":[{"name":"Department of Oral and Maxillofacial Surgery, Plastic Operations University Medical Center Mainz  Mainz Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9669-3187","authenticated-orcid":false,"given":"Eduard","family":"Valmaseda\u2010Castell\u00f3n","sequence":"additional","affiliation":[{"name":"Oral Surgery and Implantology, 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