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Cone\u2010beam computed tomography scans at five time points were analyzed to quantify graft volume and height changes. Surgical methods and clinical outcomes for implant replacement were also recorded. Paired\n                      <jats:italic>t<\/jats:italic>\n                      \u2010test and repeated measures ANOVA were used to compare the radiographic outcomes.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The shrinkage rate of endo\u2010sinus bone grafts was statistically comparable between failed and surviving implants (32.54%\u2009\u00b1\u200920.68% vs. 21.93%\u2009\u00b1\u200910.54% at 1\u2010year follow\u2010up,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&gt;\u20090.05). Residual bone graft reached adequate height to support replaced implants. Most failed sites were successfully restored with direct implant replacement, and reinserted implants achieved a 90% survival rate over a mean follow\u2010up of 45\u2009months.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The findings suggest that implant failure after LSFE does not necessarily correlate with accelerated resorption of bone graft, supporting the feasibility of direct implant replacement without further grafting.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/cid.70154","type":"journal-article","created":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T03:15:47Z","timestamp":1777518947000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Long\u2010Term Stability of Bone Graft After Implant Failure in Lateral Sinus Floor Elevation: A Retrospective Paired Study"],"prefix":"10.1111","volume":"28","author":[{"given":"Mengdie","family":"Fu","sequence":"first","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danji","family":"Zhu","sequence":"additional","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-9552-4717","authenticated-orcid":false,"given":"Luyao","family":"Song","sequence":"additional","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zichun","family":"Xia","sequence":"additional","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenyi","family":"Xu","sequence":"additional","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8203-6151","authenticated-orcid":false,"given":"Zhiwei","family":"Jiang","sequence":"additional","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1780-8757","authenticated-orcid":false,"given":"Guoli","family":"Yang","sequence":"additional","affiliation":[{"name":"Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Zhejiang Key Laboratory of Oral Biomedical  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,4,29]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.13249"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/clr.12524"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/jcpe.13055"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.13086"},{"key":"e_1_2_10_6_1","first-page":"160","article-title":"Influence of Anatomy on Schneiderian Membrane Perforations During Sinus Elevation Surgery: Three\u2010Dimensional Analysis","volume":"13","author":"Cho S. 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