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Therefore, we analyzed the swallowing dynamics of masticatory swallowing in anterior cervical spine disease surgery using foods that require chewing close to actual meals.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>A day before and one week after the surgery, a videofluoroscopic swallow study (VFSS) was performed, and the distance of hyoid bone movement in the anterior and superior directions, amount of opening of the upper esophageal sphincter (UES), time of passage through the pharynx, number of swallows, and amount of pharyngeal residual were measured on the VFSS images during a masticatory swallow of corn flakes. The swallowing function was evaluated by DSS (dysphagia severity scale) and FOIS (functional oral intake scale). Imaging software was used for the measurements.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Postoperative hyoid movement during masticatory swallowing was not significantly different for anterior movement but significantly limited in upward movement (<jats:italic>p<\/jats:italic>\u2009=\u20090.002); UES opening volume was significantly decreased (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), and bolus residue was significantly worse (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), compared to preoperative. The pharyngeal transit time was not significantly different; the number of swallows increased (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), along with DSS (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and FOIS (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), with significant differences before and after surgery, indicating worsened swallowing function.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Swallowing function worsened in masticatory swallowing after surgery for cervical spine disease, mainly due to the restriction of upward movement of the hyoid bone and the resulting increase in pharyngeal residuals after swallowing.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00586-023-08022-7","type":"journal-article","created":{"date-parts":[[2023,11,15]],"date-time":"2023-11-15T10:02:13Z","timestamp":1700042533000},"page":"243-252","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Kinematic analysis of chewing and swallowing function after cervical spine surgery"],"prefix":"10.1007","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5512-2609","authenticated-orcid":false,"given":"Kota","family":"Aritaki","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5572-4159","authenticated-orcid":false,"given":"Kazuharu","family":"Nakagawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5005-036X","authenticated-orcid":false,"given":"Kanako","family":"Yoshimi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Yoshizawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8998-8961","authenticated-orcid":false,"given":"Shohei","family":"Hasegawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5752-5946","authenticated-orcid":false,"given":"Ryosuke","family":"Yanagida","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Motonori","family":"Hashimoto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6200-0100","authenticated-orcid":false,"given":"Takashi","family":"Hirai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7034-4402","authenticated-orcid":false,"given":"Kohei","family":"Yamaguchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9543-1388","authenticated-orcid":false,"given":"Ayako","family":"Nakane","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3511-9020","authenticated-orcid":false,"given":"Toshitaka","family":"Yoshii","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0227-8658","authenticated-orcid":false,"given":"Atsushi","family":"Okawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5514-6419","authenticated-orcid":false,"given":"Haruka","family":"Tohara","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,11,15]]},"reference":[{"key":"8022_CR1","doi-asserted-by":"publisher","first-page":"E177","DOI":"10.1097\/BSD.0000000000000060","volume":"29","author":"Y Min","year":"2016","unstructured":"Min Y, Kim W, Kang S, Choi J, Yeom J, Paik N (2016) Incidence of dysphagia and serial videofluoroscopic swallow study findings after anterior cervical discectomy and fusion: a prospective study. 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