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Raw scan data, digitally mounted casts after scan\u2011repair, and digital casts after tooth segmentation in OnyxCeph were analyzed. IA reproduction accuracy and segmentation quality were statistically compared using the Median test and Chi\u2011squared test (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.05).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      All IOS reproduced IAs significantly more accurately than the CVI (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Among IOS, PRI2\u2011wl achieved\u2009&gt;\u200980% correct IA reproduction, whereas 3800\u2011wl and TRI5\u2011wl fell short by up to 20%. Scan\u2011repair marginally improved IA capture for some IOS, while the conventional impression showed no change. Segmentation errors clustered in teeth with pronounced gingival recession; healthy gingiva yielded higher accuracy. Significant differences between raw and segmented data were found for TRI5\u2011wl (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.027) and 3800\u2011wl (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.044).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Within the limits of this in vitro study, IOS outperform conventional impressions for IA reproduction in PCDs. Accuracy varies among IOS and is linked to raw\u2011scan quality. Automated segmentation is reliable for teeth with healthy gingiva but is challenged by periodontal defects.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance<\/jats:title>\n                    <jats:p>Precise IA capture enhances orthodontic movement planning and streamlines CAD\u2011based workflows, reducing manual corrections and improving outcomes for patients with compromised periodontium.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00784-026-07069-2","type":"journal-article","created":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T06:51:47Z","timestamp":1786085507000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Capturing of interdental areas with digital and conventional impression systems and their impact on automatic tooth segmentation in CAD software: an in vitro study"],"prefix":"10.1007","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4929-9213","authenticated-orcid":false,"given":"Katharina","family":"Klaus","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linus Vincent","family":"Hardt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bernd","family":"W\u00f6stmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabine","family":"Ruf","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maximiliane Amelie","family":"Schlenz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,8,7]]},"reference":[{"key":"7069_CR1","doi-asserted-by":"publisher","DOI":"10.1002\/9781118702925","volume-title":"Adult orthodontics","author":"B Melsen","year":"2012","unstructured":"Melsen B (2012) Adult orthodontics. 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