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A specific 3D Imaging technology was used to generate 3D models of posterior dentition (M1\u2009=\u2009maxillary first molars, P2\u2009=\u2009second premolars, P1\u2009=\u2009first premolar) and calculate volumetric data (mean and percentage values) and shape changes, the latter obtained from deviation analysis between the radicular models at different time points. Evaluation of radicular length changes was performed for each tooth. Data were statistically analysed to perform intra-timing and inter-groups comparisons.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>A significant reduction of radicular volume and length was found in posterior dentition in both groups (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05), and the M1 (volume) and its palatal root (length) were mostly involved in this response. No differences were found between M1, P1 and P2 (<jats:italic>p<\/jats:italic>\u2009&gt;\u20090.05) when volumetric changes were calculated as percentage of the total volume. Deviation analysis revealed that the radicular areas mostly affected by shape change were the apex and bucco-medial side. The amount of ERR was significantly greater in TB group compared to BB group.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>BB-RME treatment could reduce the amount of ERR at the post-expansion stage.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12903-023-03280-9","type":"journal-article","created":{"date-parts":[[2023,8,12]],"date-time":"2023-08-12T09:02:19Z","timestamp":1691830939000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["External root resorption and rapid maxillary expansion in the short-term: a CBCT comparative study between tooth-borne and bone-borne appliances, using 3D imaging digital technology"],"prefix":"10.1186","volume":"23","author":[{"given":"Rosalia","family":"Leonardi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincenzo","family":"Ronsivalle","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gaetano","family":"Isola","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco","family":"Cicci\u00f9","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manuel","family":"Lagrav\u00e8re","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Flores-Mir","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonino","family":"Lo Giudice","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,8,12]]},"reference":[{"issue":"1","key":"3280_CR1","doi-asserted-by":"publisher","first-page":"9","DOI":"10.1186\/s40510-019-0261-5","volume":"20","author":"M Krusi","year":"2019","unstructured":"Krusi M, Eliades T, Papageorgiou SN. 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