{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T00:46:56Z","timestamp":1787014016168,"version":"build-2736575974"},"reference-count":90,"publisher":"Wiley","issue":"S2","license":[{"start":{"date-parts":[[2014,10,27]],"date-time":"2014-10-27T00:00:00Z","timestamp":1414368000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clin Implant Dent Rel Res"],"published-print":{"date-parts":[[2015,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Reliable implant\u2010supported rehabilitation of an alveolar ridge needs sufficient volume of bone. In order to achieve a prosthetic\u2010driven positioning, bone graft techniques may be required.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>This prospective cohort study aims to clinically evaluate the amount of resorption of corticocancellous fresh\u2010frozen allografts bone blocks used in the reconstruction of the severe atrophic maxilla.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>Twenty\u2010two partial and totally edentulous patients underwent bone augmentation procedures with fresh\u2010frozen allogenous blocks from the iliac crest under local anesthesia. Implants were inserted into the grafted sites after a healing period of 5 months. Final fixed prosthesis was delivered\u2009\u00b1\u20094 months later. Ridge width analysis and measurements were performed with a caliper before and after grafting and at implant insertion. Bone biopsies were performed in 16 patients.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A total of 98 onlay block allografts were used in 22 patients with an initial mean alveolar ridge width of 3.41\u2009\u00b1\u20091.36\u2009mm. Early exposure of blocks was observed in four situations and one of these completely resorbed. Mean horizontal bone gain was 3.63\u2009\u00b1\u20091.28\u2009mm (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u2009.01). Mean buccal bone resorption between allograph placement and the reopening stage was 0.49\u2009\u00b1\u20090.54\u2009mm, meaning approximately 7.1% (95% confidence interval: [5.6%, 8.6%]) of total ridge width loss during the integration period. One hundred thirty dental implants were placed with good primary stability (\u2265\u200930\u2009Ncm). Four implants presented early failure before the prosthetic delivery (96.7% implant survival). All patients were successfully rehabilitated. Histomorphometric analysis revealed 20.9\u2009\u00b1\u20095.8% of vital bone in close contact to the remaining grafted bone. A positive strong correlation (adjusted\n                      <jats:italic>R<\/jats:italic>\n                      <jats:sup>2<\/jats:sup>\n                      \u2009=\u20090.44,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u2009.003) was found between healing time and vital bone percentage.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Augmentation procedures performed using fresh\u2010frozen allografts from the iliac crest are a suitable alternative in the reconstruction of the atrophic maxilla with low resorption rate at 5 months, allowing proper stability of dental implants followed by fixed prosthetic rehabilitation.<\/jats:p>\n                  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