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Additionally, it investigates the relationship between the degree of fusion in the operated disc space and mobility changes in the adjacent segments.\n<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>In total, 170 disc spaces were operated on in 104 consecutive patients qualified for one- or two-level surgery. The degree of mobility of segments directly above and below the implant insertion site was calculated. Measurements were performed the day before the surgery and 12\u00a0months post-surgery. Functional (flexion and extension) radiographs of the cervical spine and CT scans obtained 12\u00a0months post-surgery were used to evaluate the fusion status. The results were subjected to statistical analysis.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Statistically significant increase in mobility was recorded for the segments situated immediately below the operative site, with a mean change in mobility of 1.7\u00a0mm. Complete fusion was demonstrated in 101 cases (71.1%), and partial fusion in 43 cases (29.9%). In the complete fusion subgroup, the ranges of both flexion and extension in the segments directly below the operative site were significantly greater than those in the partial fusion (pseudoarthrosis) subgroup.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The mobility of the adjacent segment below the implant insertion site was significantly increased at 12\u00a0months post-ACDF surgery. The range of this compensatory hypermobility was significantly greater in patients with complete fusion at the ACDF site than in cases of pseudoarthrosis. Implant subsidence was not associated with mobility changes in the segments directly above or directly below the site of ACDF surgery.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00586-023-07634-3","type":"journal-article","created":{"date-parts":[[2023,3,26]],"date-time":"2023-03-26T23:05:18Z","timestamp":1679871918000},"page":"1616-1623","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Adjacent segment mobility after ACDF considering fusion status at the implant insertion site"],"prefix":"10.1007","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0673-1480","authenticated-orcid":false,"given":"Bartosz","family":"Godlewski","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6687-1517","authenticated-orcid":false,"given":"Adam","family":"Bebenek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5109-4970","authenticated-orcid":false,"given":"Maciej","family":"Dominiak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7811-2852","authenticated-orcid":false,"given":"Marcin","family":"Bochniak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4545-4845","authenticated-orcid":false,"given":"Piotr","family":"Cieslik","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1421-2050","authenticated-orcid":false,"given":"Tomasz","family":"Pawelczyk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,3,14]]},"reference":[{"issue":"21","key":"7634_CR1","doi-asserted-by":"publisher","first-page":"2439","DOI":"10.1097\/01.brs.0000239125.54761.23","volume":"31","author":"JS Schwab","year":"2006","unstructured":"Schwab JS, Diangelo DJ, Foley KT (2006) Motion compensation associated with single-level cervical fusion: where does the lost motion go? 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