{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,15]],"date-time":"2025-12-15T19:50:42Z","timestamp":1765828242761},"reference-count":21,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2022,11,18]],"date-time":"2022-11-18T00:00:00Z","timestamp":1668729600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["The grant\u2010in\u2010Aid for Scientific Research (B) progr"],"award-info":[{"award-number":["The grant\u2010in\u2010Aid for Scientific Research (B) progr"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Biomed Mater Res"],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Rigid spinal fusion with instrumentation has been widely applied in treating degenerative spinal disorders and has shown excellent and stable surgical results. However, adjacent segment pathology or implants' loosening could be problematic due to the spine's segmental fusion. Therefore, this study verified a novel concept for posterior stabilization with polyethylene inserts inside a pedicle screw assembly using bone models. We observed that although the gripping capacity of the dynamic pedicle screw system using a tensile and compression tester was less than half that of the rigid pedicle screw system, the flexion\u2010extension moment of the dynamic pedicle screws was significantly lower than that of the rigid pedicle screws. Furthermore, while the bending force of the rigid pedicle screw assembly increased linearly with an increase in the bending angle throughout the test, that of the dynamic pedicle screw assembly also increased linearly until a bending angle of 2.5\u00b0 was reached. However, this angle decreased at a bending angle of more than 2.5\u00b0. Additionally, the fatigue test of 1.0\u2009\u00d7\u200910<jats:sup>6<\/jats:sup> cycles showed that the pull\u2010out force of the dynamic pedicle screws from two different polyurethane foam blocks was significantly higher than that of the rigid pedicle screws. Therefore, based on our results, we propose that the device can be applied in clinical cases to reduce screw loosening and adjacent segment pathology.<\/jats:p>","DOI":"10.1002\/jbm.b.35191","type":"journal-article","created":{"date-parts":[[2022,11,19]],"date-time":"2022-11-19T05:05:46Z","timestamp":1668834346000},"page":"805-811","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A dynamic pedicle screw system using polyethylene insert for the lumbar spine"],"prefix":"10.1002","volume":"111","author":[{"given":"Yasushi","family":"Oshima","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"So","family":"Kato","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toru","family":"Doi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuki","family":"Taniguchi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshitaka","family":"Matsubayashi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nozomu","family":"Ohtomo","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenichi","family":"Watanabe","sequence":"additional","affiliation":[{"name":"Division of Science for Joint Reconstruction, Graduate School of Medicine The University of Tokyo  Tokyo Japan"},{"name":"Medical R&amp;D Center, KYOCERA Corporation  Shiga Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masayuki","family":"Kyomoto","sequence":"additional","affiliation":[{"name":"Division of Science for Joint Reconstruction, Graduate School of Medicine The University of Tokyo  Tokyo Japan"},{"name":"Medical R&amp;D Center, KYOCERA Corporation  Shiga Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sakae","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toru","family":"Moro","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery The University of Tokyo Hospital  Tokyo Japan"},{"name":"Division of Science for Joint Reconstruction, Graduate School of Medicine The University of Tokyo  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,11,18]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.spinee.2018.05.025"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00586-015-3768-6"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/BRS.0b013e3181e9af93"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/jbm.a.34986"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-016-0913-2"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.spinee.2012.11.014"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1177\/0954411919880694"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nec.2021.05.007"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1097\/00024720-200308000-00015"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00586-002-0438-2"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000200092.49001.6e"},{"key":"e_1_2_9_13_1","first-page":"219256822199669","article-title":"Evaluating screw stability after pedicle screw fixation with PEEK rods. 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