{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T22:29:59Z","timestamp":1790288999578,"version":"4.1.0"},"reference-count":40,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2024,7,31]],"date-time":"2024-07-31T00:00:00Z","timestamp":1722384000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medicina"],"abstract":"<jats:p>Complications that occur after maxillary sinus floor augmentation (MSA) can be divided into early and late complications. Early complication is a side effect that occurs during the MSA procedure or during the initial healing period. Usually, late complication refers to a side effect that occurs after 3 weeks of MSA. However, in the longer term, there are cases that occur during the follow-up period after the prosthesis is delivered, and most of them present with peri-implantitis. In the present two cases, sinus graft complications occurred 1\u20132 years after prosthesis delivery but were independent of peri-implantitis and had atypical features showing asymptomatic results. Although the route of the infection source is unclear, the lesions were presumed to be caused by slow and delayed inflammation of oral bacteria infiltrating the bone graft area of the maxillary sinus. Within the limitations of present case reports, bone defects were successfully managed with a guided bone regeneration (GBR) procedure that included thorough defect degranulation, surface decontamination of exposed implant, and regrafting. Periodic monitoring of radiographic images is required for the detection of unusual sinus graft complications in sinus-augmented sites.<\/jats:p>","DOI":"10.3390\/medicina60081246","type":"journal-article","created":{"date-parts":[[2024,7,31]],"date-time":"2024-07-31T08:02:27Z","timestamp":1722412947000},"page":"1246","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Atypical and Late-Developed Sinus Graft Complications Following Maxillary Sinus Augmentation: Successful Management with Guided Bone Regeneration"],"prefix":"10.3390","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9123-7019","authenticated-orcid":false,"given":"Won-Bae","family":"Park","sequence":"first","affiliation":[{"name":"Department of Periodontology, School of Dentistry, Kyung Hee University; Seoul 02447, Republic of Korea"},{"name":"Private Practice in Periodontics and Implant Dentistry, Seoul 02771, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenechi P.","family":"Okany","sequence":"additional","affiliation":[{"name":"Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences Columbia University College of Dental Medicine, #PH7E-110, 630 W. 168 St., New York, NY 10032, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wonhee","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Dentistry, Division of Dentistry, College of Medicine, Hanyang University, Gyeongchun-ro, Guri-si 11923, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2364-8366","authenticated-orcid":false,"given":"Ji-Young","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Division of Dentistry, College of Medicine, Hanyang University, 222-1 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7695-1708","authenticated-orcid":false,"given":"Hyun-Chang","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Periodontology, Periodontal-Implant Clinical Research Institute, School of Dentistry, Kyunghee Daero 23, Dongdaemoon-gu, Seoul 02447, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8140-3095","authenticated-orcid":false,"given":"Philip","family":"Kang","sequence":"additional","affiliation":[{"name":"Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences Columbia University College of Dental Medicine, #PH7E-110, 630 W. 168 St., New York, NY 10032, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1016\/j.ijom.2017.05.001","article-title":"A systematic review and meta-analysis of long-term studies (five or more years) assessing maxillary sinus floor augmentation","volume":"47","author":"Aludden","year":"2018","journal-title":"Int. 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