{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T16:37:36Z","timestamp":1792687056742,"version":"4.5.0"},"reference-count":20,"publisher":"Media Sphere Publishing House","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Stomatology"],"published-print":{"date-parts":[[2026,10,22]]},"abstract":"<jats:p>objective. To assess, using cone-beam computed tomography (CBCT), the association between a bone-augmented subantral barrier after sinus floor elevation and radiological signs of apical periodontitis and destructive sinus floor bone changes in adjacent maxillary premolars and molars. Material and methods. A retrospective comparative clinico-radiological study based on archived CBCT data was performed. The cohort comprised 494 patients (554 teeth) aged 25\u201475 years: main group \u2014 251 patients (289 teeth) examined 7 years (\u00b13 months) after sinus floor elevation; control group \u2014 243 patients (265 teeth) without sinus floor elevation. The primary analysis of apical periodontitis used generalized estimating equations (GEE) clustered by patient; the adjusted model included group, age, sex, tooth type, and previous endodontic treatment. Inter- and intra-observer agreement was assessed on a 100-tooth subsample. Results. Apical periodontitis was found in 2.8% (8\/289) of main-group teeth vs 9.8% (26\/265) of controls: crude OR 0.26 (95% CI 0.12\u20140.59; p&lt;0.001); GEE OR 0.29 (0.11\u20140.75; p=0.011). After adjustment the association attenuated to borderline significance: OR 0.38 (0.14\u20141.05; p=0.063). Destructive sinus floor bone changes were absent in the main group (0\/289) and present in 10.2% (27\/265) of controls. Observer agreement was substantial to almost perfect: Cohen\u2019s kappa 0.73\u20140.82; ICC(2.1) 0.98\u20140.99. Conclusion. A bone-augmented subantral barrier was associated with an approximately 2.5\u20143-fold reduction in the odds of apical periodontitis and with the absence of destructive sinus floor bone changes in the observed sample. The findings are consistent with a protective barrier hypothesis; causality cannot be inferred. The study is hypothesis-generating and requires prospective confirmation.<\/jats:p>","DOI":"10.17116\/stomat202610505149","type":"journal-article","created":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T15:39:02Z","timestamp":1792683542000},"page":"49","source":"Crossref","is-referenced-by-count":0,"title":["The protective effect of the bone-augmented subantral barrier after sinus lift on periapical changes of adjacent teeth based on CBCT data"],"prefix":"10.17116","volume":"105","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-1557-7130","authenticated-orcid":false,"given":"R.U.","family":"Bersanov","sequence":"first","affiliation":[{"name":"H.I. Ibragimov Comprehensive Research Institute Russian Academy of Sciences","place":["Grozny, Russia"]},{"name":"A.A. Kadyrov Chechen State University","place":["Grozny, Russia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-8718-7679","authenticated-orcid":false,"given":"G.G.","family":"Ibrahimov","sequence":"additional","affiliation":[{"name":"H.I. Ibragimov Comprehensive Research Institute Russian Academy of Sciences","place":["Grozny, Russia"]},{"name":"A.A. Kadyrov Chechen State University","place":["Grozny, Russia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-5438-4625","authenticated-orcid":false,"given":"S.M.","family":"Mammedov","sequence":"additional","affiliation":[{"name":"H.I. Ibragimov Comprehensive Research Institute Russian Academy of Sciences","place":["Grozny, Russia"]},{"name":"A.A. Kadyrov Chechen State University","place":["Grozny, Russia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-2010-3101","authenticated-orcid":false,"given":"M.U.","family":"Darchieva","sequence":"additional","affiliation":[{"name":"H.I. Ibragimov Comprehensive Research Institute Russian Academy of Sciences","place":["Grozny, Russia"]},{"name":"A.A. Kadyrov Chechen State University","place":["Grozny, Russia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-0299-6542","authenticated-orcid":false,"given":"M.D.","family":"Bataev","sequence":"additional","affiliation":[{"name":"H.I. Ibragimov Comprehensive Research Institute Russian Academy of Sciences","place":["Grozny, Russia"]},{"name":"A.A. 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