{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T23:04:37Z","timestamp":1792019077047,"version":"4.4.0"},"reference-count":31,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2024,4,8]],"date-time":"2024-04-08T00:00:00Z","timestamp":1712534400000},"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":[[2024,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>The objective of this study is (1) to compare the accuracy of an open\u2010sleeved static computer\u2010assisted implant system (sCAIS) with a closed\u2010sleeve sCAIS and free\u2010hand approach in immediate implant placement (IIP) of maxillary molar sites and (2) to investigate the influence of socket morphology on these approaches.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Ninety partially edentulous duplicated maxillary models simulating three different molar sockets (type A, B, and C based on Smith and Tarnow's classification) were investigated. Three modalities, including sCAIS with open\u2010sleeves, sCAIS with closed\u2010sleeves, and free\u2010hand approach, were applied separately to 30 models with 120 sockets. A customized Python script automatically measured the deviations between the virtual and actual implant positions for all 360 implants.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The 3D deviations of sCAIS were significantly influenced by the socket and sleeve types. Both guided groups exhibited significantly less deviation than the free\u2010hand approach. Type A and C sockets resulted in better implant positions than type B socket sites. In type B sockets, the open\u2010sleeve group achieved significantly less deviation compared to the closed\u2010sleeve group, with respect to apical global (1.34\u2009\u00b1\u20090.53 vs. 1.84\u2009\u00b1\u20090.59\u2009mm), coronal horizontal (0.68\u2009\u00b1\u20090.36 vs. 0.93\u2009\u00b1\u20090.34\u2009mm), apical horizontal (1.21\u2009\u00b1\u20090.59 vs. 1.74\u2009\u00b1\u20090.63\u2009mm), and angular (3.30\u2009\u00b1\u20091.41 vs. 4.41\u2009\u00b1\u20091.96\u00b0) deviations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Guided implant surgery significantly reduces deviations during molar IIP compared to free\u2010hand procedures. Furthermore, the use of open\u2010sleeve sCAIS appears to be more effective in minimizing deviations in type B sockets when compared with the closed\u2010sleeve guided system.<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.14265","type":"journal-article","created":{"date-parts":[[2024,4,8]],"date-time":"2024-04-08T11:04:06Z","timestamp":1712574246000},"page":"694-705","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Accuracy of open\u2010sleeved vs. closed\u2010sleeved static computer\u2010assisted implant systems in immediate maxillary molar implant placement: An in\u00a0vitro study"],"prefix":"10.1111","volume":"35","author":[{"given":"Zhaozhao","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Periodontics and Oral Medicine, School of Dentistry University of Michigan  Ann Arbor Michigan 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