{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T15:18:37Z","timestamp":1763047117498,"version":"3.45.0"},"reference-count":30,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T00:00:00Z","timestamp":1762992000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T00:00:00Z","timestamp":1762992000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Sohag University"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Int J Implant Dent"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Patients<\/jats:title>\n                    <jats:p>Twenty patients with residual bone heights of 4\u20137 mm in the posterior maxilla were randomly divided into two groups: Group 1 (conventional crestal approach) and Group 2 (endoscopic-assisted crestal approach). A 2.7\u00a0mm rigid endoscope was used to monitor membrane integrity after each surgical step. Bone grafting with a xenograft-platelet-rich fibrin mix was performed, followed by implant placement. Membrane perforation rates, surgical time, and bone density changes were evaluated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Twenty-two implants were placed (11 in each group). Membrane perforation occurred in 33% of cases in Group 1 and 10% in Group 2 (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.582). Group 2 had significantly longer surgical times (27.3\u2009\u00b1\u20092.00 min) compared to Group 1 (15.4\u2009\u00b1\u20092.22 min,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.0001). Bone density increased significantly from 609.55\u2009\u00b1\u2009108.71 HU postoperatively to 878.38\u2009\u00b1\u2009114.60 HU at six months (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Endoscopic-assisted techniques significantly reduced perforation rates and improved surgical precision.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The endoscopic-assisted crestal sinus lifting is a unique technique allowing visualization and assessment of membrane integrity and may enhance the safety and the predictability during membrane elevation, reducing complications such as membrane perforation. However, its benefits must be weighed against increased surgical time and cost.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s40729-025-00653-3","type":"journal-article","created":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T15:13:57Z","timestamp":1763046837000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Conventional versus endoscopic-assisted crestal sinus lifting with simultaneous implant placement: a comparative clinical study"],"prefix":"10.1186","volume":"11","author":[{"given":"Samy","family":"Elian","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ashraf","family":"Abdelfattah","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdelaziz","family":"Baiomy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,11,13]]},"reference":[{"issue":"8","key":"653_CR1","first-page":"613","volume":"38","author":"PJ Boyne","year":"1980","unstructured":"Boyne PJ, James RA. 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All patients signed an informed written consent form prior to the surgery, providing their approval to use the information obtained in the implant procedures. All patients gave their consent to participate in the surgery.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"All patients approved for publications.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors: Samy Elian, Ashraf Abdelfattah and Abdelaziz Baiomy declare that they have no conflict of interest.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"67"}}