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Postoperative CBCT scans, acquired 16.7\u2009\u00b1\u20095.3 months after surgery, were registered to the corresponding preoperative scans using voxel-based superimposition. Skeletal displacement and corresponding overlying soft-tissue thickness were assessed at subspinale (A), supradentale (Sd), infradentale (Id), supramentale (B), pogonion (Pog), and menton (Me). Soft-tissue thickness was defined as the linear distance between each hard-tissue landmark and its corresponding soft-tissue landmark. Skeletal displacement was measured at the corresponding hard-tissue landmarks.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      89 patients were enrolled, 33 male and 56 female, mean age of 30.3\u2009\u00b1\u200910.3 years. Significant postoperative soft-tissue thinning was observed at A (0.40\u2009\u00b1\u20091.51\u00a0mm), Id (2.20\u2009\u00b1\u20092.11\u00a0mm), B (0.33\u2009\u00b1\u20091.30\u00a0mm), and Pog (0.48\u2009\u00b1\u20091.29\u00a0mm), whereas soft-tissue thickness at Sd and Me did not change significantly. Pearson correlation analysis indicated that thickness changes were not associated with age, sex, or CBCT interval. Larger sagittal advancement at A and Id was associated with more pronounced thinning of the corresponding soft tissue (A:\n                      <jats:italic>r<\/jats:italic>\n                      = -0.650,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001; Id:\n                      <jats:italic>r<\/jats:italic>\n                      = -0.338,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.001), with ratios of thinning to movement of 0.20 and 0.30, respectively. In contrast, larger downward vertical movement of B was associated with less thinning at B (\n                      <jats:italic>r<\/jats:italic>\n                      \u2009=\u20090.240,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.023), with a ratio of thinning to downward movement of 0.05.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Bimaxillary surgery in skeletal Class II patients without genioplasty resulted in region specific soft-tissue thinning, particularly affecting the lower lip.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical relevance<\/jats:title>\n                    <jats:p>Postoperative soft-tissue thinning should be considered during surgical planning and patient communication.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00784-026-07074-5","type":"journal-article","created":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T01:56:12Z","timestamp":1786413372000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Soft-tissue thickness changes following bimaxillary surgery in skeletal class II malocclusion"],"prefix":"10.1007","volume":"30","author":[{"given":"Hao","family":"Chen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dirk-Melle","family":"Beek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Baan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephan Christian","family":"M\u00f6hlhenrich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kasper","family":"Stokbro","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9142-9253","authenticated-orcid":false,"given":"Tong","family":"Xi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,8,11]]},"reference":[{"key":"7074_CR1","volume-title":"Essentials of orthognathic surgery","author":"JP Reyneke","year":"2022","unstructured":"Reyneke JP (2022) Essentials of orthognathic surgery, 3rd edition. 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