{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T15:41:06Z","timestamp":1760888466381,"version":"build-2065373602"},"reference-count":55,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2011,1,1]],"date-time":"2011-01-01T00:00:00Z","timestamp":1293840000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100004375","name":"Tel Aviv University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004375","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2011,1]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> The crestal core elevation (CCE) technique is reportedly a less invasive procedure than the lateral window elevation technique. We retrospectively evaluated long\u2010term outcomes of CCE procedures over an 11\u2010year time period.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Core preparations were made after extractions of 57 upper molars in 45 patients. Extraction sites were drilled with a calibrated trephine bur to an estimated distance of 1 mm from the sinus membrane. The trephined interradicular bone and underlying sinus membrane were imploded into the sinus. The surgical crater and residual extraction socket were filled with deproteinized bovine bone mineral or freeze\u2010dried bone allograft, stabilized, and protected with an absorbable collagen membrane and fully covered with coronally positioned flaps. Implants were placed 4 months later. Success was defined if \u22659 mm available bone height was available. Where the available bone height varied between 7 and 9 mm, implant placement was complemented using the bone\u2010added osteotome sinus floor elevation technique; those sites were defined as a \u201cpartial success.\u201d<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The CCE technique was successful in 31 (68.9%) out of 45 sites, and partially successful in six (13.3%) out of 45 sites. Eight sites failed (17.8%). Surgical failures were caused by core detachment resulting in large tears of the sinus membrane. Implants placed in successful sites presented a 100% survival rate during the study duration.<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> CCE implemented simultaneously with molar extractions provided therapeutic benefits and clinical limitations. The subsequent implant placement using CCE revealed an excellent survival rate in the study population evaluated.<\/jats:p>","DOI":"10.1902\/jop.2010.090682","type":"journal-article","created":{"date-parts":[[2010,8,23]],"date-time":"2010-08-23T16:42:58Z","timestamp":1282581778000},"page":"41-51","source":"Crossref","is-referenced-by-count":8,"title":["Maxillary Sinus Augmentation by the Crestal Core Elevation 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