{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T10:32:28Z","timestamp":1788517948406,"version":"build-2803163510"},"reference-count":33,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2023,5,30]],"date-time":"2023-05-30T00:00:00Z","timestamp":1685404800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2023,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>To assess in vitro the workflow for alveolar ridge augmentation with customised 3D printed block grafts and simultaneous computer\u2010assisted implant planning and placement.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Twenty resin mandible models with an edentulous area and horizontal ridge defect in the region 34\u201336 were scanned with cone beam computed tomography (CBCT). A block graft for horizontal ridge augmentation in the region 34\u201336 and an implant in the position 35 were digitally planned. Twenty block grafts were 3D printed out of resin and one template for guided implant placement were stereolithographically produced. The resin block grafts were positioned onto the ridge defects and stabilised with two fixation screws each. Subsequently, one implant was inserted in the position 35 through the corresponding template for guided implant placement. Optical scans of the study models together with the fixated block graft were performed prior to and after implant placement. The scans taken after block grafting were superimposed with the virtual block grafting plan through a best\u2010fit algorithm, and the linear deviation between the planned and the achieved block positions was calculated. The precision of the block fixation was obtained by superimposing the 20 scans taken after grafting and calculating the deviation between the corresponding resin blocks. The superimposition between the scans taken after and prior to implant placement was performed to measure a possible displacement in the block position induced by guided implant placement. The (98\u20132%)\/2 percentile value was determined as a parameter for surface deviation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean deviation in the position of the block graft compared to the virtual plan amounted to 0.79\u2009\u00b1\u20090.13\u2009mm. The mean deviation between the positions of the 20 block grafts measured 0.47\u2009\u00b1\u20090.2\u2009mm, indicating a clinically acceptable precision. Guided implant placement induced a mean shift of 0.16\u2009\u00b1\u20090.06\u2009mm in the position of the block graft.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Within the limitations of this in vitro study, it can be concluded that customised block grafts fabricated through CBCT, computer\u2010assisted design and 3D printing allow alveolar ridge augmentation with clinically acceptable predictability and reproducibility. Computer\u2010assisted implant planning and placement can be performed simultaneously with computer\u2010assisted block grafting leading to clinically non\u2010relevant dislocation of block grafts.<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.14098","type":"journal-article","created":{"date-parts":[[2023,5,30]],"date-time":"2023-05-30T08:14:55Z","timestamp":1685434495000},"page":"719-726","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Computer\u2010assisted bone augmentation, implant planning and placement: An in vitro investigation"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8692-8111","authenticated-orcid":false,"given":"S.","family":"Unger","sequence":"first","affiliation":[{"name":"Clinic of Cranio\u2010Maxillofacial and Oral Surgery, Center of Dental Medicine University of Zurich  Z\u00fcrich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7551-7934","authenticated-orcid":false,"given":"G. I.","family":"Benic","sequence":"additional","affiliation":[{"name":"Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center of Dental Medicine University of Zurich  Z\u00fcrich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Ender","sequence":"additional","affiliation":[{"name":"Clinic for Preventive Dentistry, Periodontology and Cariology, Center of Dental Medicine University of Zurich  Z\u00fcrich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Pasic","sequence":"additional","affiliation":[{"name":"Clinic of Cranio\u2010Maxillofacial and Oral Surgery, Center of Dental Medicine University of Zurich  Z\u00fcrich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8280-7347","authenticated-orcid":false,"given":"C. H. 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