{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T17:49:22Z","timestamp":1787507362702,"version":"build-2736575974"},"reference-count":63,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,12,26]],"date-time":"2022-12-26T00:00:00Z","timestamp":1672012800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bioengineering"],"abstract":"<jats:p>The hybrid dynamic stabilization system, Dynesys-Transition-Optima, represents a novel pedicle-based construct for the treatment of lumbar degenerative disease. The theoretical advantage of this system is to stabilize the treated segment and preserve the range of motion within the adjacent segment while potentially decreasing the risk of adjacent segment disease following lumbar arthrodesis. Satisfactory short-term outcomes were previously demonstrated in the Dynesys-Transition-Optima system. However, long-term follow-up reported accelerated degeneration of adjacent segments and segmental instability above the fusion level. This study investigated the biomechanical effects of the Dynesys-Transition-Optima system on segment motion and intradiscal pressure at adjacent and implanted levels. Segmental range of motion and intradiscal pressure were evaluated under the conditions of the intact spine, with a static fixator at L4\u20135, and implanted with DTO at L3\u20134 (Dynesys fixator) and L4\u20135 (static fixator) by applying the loading conditions of flexion\/extension (\u00b17.5 Nm) and lateral bending (\u00b17.5 Nm), with\/without a follower preload of 500 N. Our results showed that the hybrid Dynesys-Transition-Optima system can significantly reduce the ROM at the fusion level (L4\u2013L5), whereas the range of motion at the adjacent level (L3\u20134) significantly increased. The increase in physiological loading could be an important factor in the increment of IDP at the intervertebral discs at the lumbar spine. The Dynesys-Transition-Optima system can preserve the mobility of the stabilized segments with a lesser range of motion on the transition segment; it may help to prevent the occurrence of adjacent segment degeneration. However, the current study cannot cover all the issues of adjacent segmental diseases. Future investigations of large-scale and long-term follow-ups are needed.<\/jats:p>","DOI":"10.3390\/bioengineering10010031","type":"journal-article","created":{"date-parts":[[2022,12,27]],"date-time":"2022-12-27T04:40:39Z","timestamp":1672116039000},"page":"31","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Biomechanical Effect of Hybrid Dynamic Stabilization Implant on the Segmental Motion and Intradiscal Pressure in Human Lumbar Spine"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6269-199X","authenticated-orcid":false,"given":"Chih-Kun","family":"Hsiao","sequence":"first","affiliation":[{"name":"Department of Medical Research, E-Da Hospital, Kaohsiung 82445, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi-Jung","family":"Tsai","sequence":"additional","affiliation":[{"name":"Department of Medical Research, E-Da Hospital, Kaohsiung 82445, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cheng-Yo","family":"Yen","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, E-Da Hospital, Kaohsiung 82445, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi-Chen","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, E-Da Hospital, Kaohsiung 82445, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao-Yuan","family":"Hsiao","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, E-Da Hospital, Kaohsiung 82445, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuan-Kun","family":"Tu","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics, E-Da Hospital, Kaohsiung 82445, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1016\/j.clineuro.2016.02.004","article-title":"Adjacent segment degeneration after posterior lumbar fusion: An analysis of possible risk factors","volume":"143","author":"Ghasemi","year":"2016","journal-title":"Clin. 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