Viezens, Lennart Maximilian

[["dc.bibliographiccitation.firstpage","277"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Medicina (Kaunas)"],["dc.bibliographiccitation.volume","58"],["dc.contributor.affiliation","Koepke, Leon-Gordian; 1Division of Spine Surgery, Department of Trauma and Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; m.stangenberg@uke.de (M.S.); m.dreimann@uke.de (M.D.); ann.heuer@uke.de (A.H.); l.viezens@uke.de (L.V.)"],["dc.contributor.affiliation","Weiser, Lukas; 2Clinic for Trauma, Orthopedics and Plastic Surgery, University Medical Center Göttingen, Georg-August-Universität, 37075 Göttingen, Germany; lukas.weiser@med.uni-goettingen.de"],["dc.contributor.affiliation","Stangenberg, Martin; 1Division of Spine Surgery, Department of Trauma and Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; m.stangenberg@uke.de (M.S.); m.dreimann@uke.de (M.D.); ann.heuer@uke.de (A.H.); l.viezens@uke.de (L.V.)"],["dc.contributor.affiliation","Dreimann, Marc; 1Division of Spine Surgery, Department of Trauma and Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; m.stangenberg@uke.de (M.S.); m.dreimann@uke.de (M.D.); ann.heuer@uke.de (A.H.); l.viezens@uke.de (L.V.)"],["dc.contributor.affiliation","Heuer, Annika; 1Division of Spine Surgery, Department of Trauma and Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; m.stangenberg@uke.de (M.S.); m.dreimann@uke.de (M.D.); ann.heuer@uke.de (A.H.); l.viezens@uke.de (L.V.)"],["dc.contributor.affiliation","Strahl, André; 4Division of Orthopedics, Department of Trauma and Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; a.strahl@uke.de"],["dc.contributor.affiliation","Viezens, Lennart; 1Division of Spine Surgery, Department of Trauma and Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; m.stangenberg@uke.de (M.S.); m.dreimann@uke.de (M.D.); ann.heuer@uke.de (A.H.); l.viezens@uke.de (L.V.)"],["dc.contributor.author","Koepke, Leon-Gordian"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Stangenberg, Martin"],["dc.contributor.author","Dreimann, Marc"],["dc.contributor.author","Heuer, Annika"],["dc.contributor.author","Strahl, André"],["dc.contributor.author","Viezens, Lennart"],["dc.date.accessioned","2022-04-01T10:03:22Z"],["dc.date.available","2022-04-01T10:03:22Z"],["dc.date.issued","2022"],["dc.date.updated","2022-09-03T20:07:05Z"],["dc.description.abstract","Background and Objectives: In osteoporotic fractures of the spine with resulting kyphosis and threatening compression of neural structures, therapeutic decisions are difficult. The posterior vertebral column resection (pVCR) has been described by different authors as a surgical treatment in a single-stage posterior procedure. The aim of this study is to evaluate midterm outcomes of patients treated by pVCR due to severe osteoporotic fractures. Materials and Methods: Retrospective data analysis of all the patients treated for osteoporotic fractures by pVCR from 2012–2020 at two centers was performed. Demographic data, visual analog scale (VAS), Frankel scale (FS), Karnofsky performance status (KPS), radiological result and spinal fusion rates were evaluated. Results: A total of 17 patients were included. The mean age was 70 ± 10.2 y. The mean VAS decreased significantly from 7.7 ± 2.8 preoperatively to 3.0 ± 1.6 at last follow-up (p < 0.001) and the segmental kyphosis decreased from 29.4 ± 14.1° to 7.9 ± 8.0° (p < 0.001). The neurologic function on the FS did not worsen in any and improved in four of the patients. The median KPS remained stable over the whole observation period (70% vs. 70%). Spinal fusion was observed in nine out of nine patients who received CT follow-up >120 days after index surgery. Conclusions: This study showed that pVCR is a safe surgical technique with few surgical complications and no neurological deterioration considering the cohort. The patients’ segmental kyphosis and VAS improved significantly, while the KPS remained stable."],["dc.identifier.doi","10.3390/medicina58020277"],["dc.identifier.pii","medicina58020277"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/106152"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1648-9144"],["dc.rights","CC BY 4.0"],["dc.title","Outcome after Posterior Vertebral Column Resection in Patients with Severe Osteoporotic Fractures—A Retrospective Analysis from Two Centers"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","221"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Neurosurgical Review"],["dc.bibliographiccitation.lastpage","228"],["dc.bibliographiccitation.volume","41"],["dc.contributor.author","Dreimann, Marc"],["dc.contributor.author","Hempfing, Axel"],["dc.contributor.author","Stangenberg, Martin"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Czorlich, Patrick"],["dc.contributor.author","Eicker, Sven Oliver"],["dc.date.accessioned","2020-12-10T14:11:12Z"],["dc.date.available","2020-12-10T14:11:12Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1007/s10143-017-0840-1"],["dc.identifier.eissn","1437-2320"],["dc.identifier.issn","0344-5607"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70996"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Posterior vertebral column resection with 360-degree osteosynthesis in osteoporotic kyphotic deformity and spinal cord compression"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","301"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Operative Orthopädie und Traumatologie"],["dc.bibliographiccitation.lastpage","310"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Viezens, L."],["dc.contributor.author","Sehmisch, S."],["dc.contributor.author","Lehmann, W."],["dc.contributor.author","Weiser, L."],["dc.date.accessioned","2020-12-10T14:08:03Z"],["dc.date.available","2020-12-10T14:08:03Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00064-019-0609-5"],["dc.identifier.eissn","1439-0981"],["dc.identifier.issn","0934-6694"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16565"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70360"],["dc.language.iso","de"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Pedikelsubtraktionsosteotomie zur Korrektur rigider Deformitäten"],["dc.title.alternative","Pedicle subtraction osteotomy to correct rigid deformities"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","275"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Operative Orthopädie und Traumatologie"],["dc.bibliographiccitation.lastpage","283"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Dreimann, Marc"],["dc.contributor.author","Lehmann, Wolfgang"],["dc.date.accessioned","2020-12-10T14:08:03Z"],["dc.date.available","2020-12-10T14:08:03Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00064-019-0615-7"],["dc.identifier.eissn","1439-0981"],["dc.identifier.issn","0934-6694"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16357"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70363"],["dc.language.iso","de"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Dorsale Stabilisation der Halswirbelkörper HWK1/HWK2 modifiziert nach Goel-Harms mit HWK-1-Pedikelschrauben"],["dc.title.alternative","Dorsal stabilization of C1/C2 modified according to Goel-Harms with C1 pedicle screws"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","284"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Operative Orthopädie und Traumatologie"],["dc.bibliographiccitation.lastpage","292"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Lehmann, Wolfgang"],["dc.contributor.author","Viezens, Lennart"],["dc.date.accessioned","2020-12-10T14:08:03Z"],["dc.date.available","2020-12-10T14:08:03Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1007/s00064-019-0608-6"],["dc.identifier.eissn","1439-0981"],["dc.identifier.issn","0934-6694"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16356"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70359"],["dc.language.iso","de"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Techniken zur Steigerung der Pedikelschraubenstabilität im osteoporotischen Knochen"],["dc.title.alternative","Techniques to increase pedicle screw stability in osteoporotic vertebrae"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","e739"],["dc.bibliographiccitation.journal","World Neurosurgery"],["dc.bibliographiccitation.lastpage","e747"],["dc.bibliographiccitation.volume","109"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Reer, Phillip"],["dc.contributor.author","Strahl, Andre"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Schroeder, Malte"],["dc.contributor.author","Beyerlein, Joerg"],["dc.contributor.author","Schaefer, Christian"],["dc.date.accessioned","2020-12-10T15:21:41Z"],["dc.date.available","2020-12-10T15:21:41Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.wneu.2017.10.074"],["dc.identifier.issn","1878-8750"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73120"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Safety and Efficacy of Single-Stage versus 2-Stage Spinal Fusion via Posterior Instrumentation and Anterior Thoracoscopy: A Retrospective Matched-Pair Cohort Study with 247 Consecutive Patients"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","80"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Trauma und Berufskrankheit"],["dc.bibliographiccitation.lastpage","85"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Weiser, L."],["dc.contributor.author","Viezens, L."],["dc.contributor.author","Huber, G."],["dc.contributor.author","Lehmann, W."],["dc.date.accessioned","2018-10-10T07:58:47Z"],["dc.date.available","2018-10-10T07:58:47Z"],["dc.date.issued","2017"],["dc.fs.pkfprnr","74524"],["dc.identifier.doi","10.1007/s10039-017-0262-x"],["dc.identifier.fs","633993"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15923"],["dc.notes.status","zu prüfen"],["dc.title","Wirbelkörperfrakturen und Osteopenie: Augmentieren oder langstreckig?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","128"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","European Spine Journal"],["dc.bibliographiccitation.lastpage","135"],["dc.bibliographiccitation.volume","30"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Sellenschloh, Kay"],["dc.contributor.author","Püschel, Klaus"],["dc.contributor.author","Morlock, Michael M."],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Lehmann, Wolfgang"],["dc.contributor.author","Huber, Gerd"],["dc.date.accessioned","2021-04-14T08:23:35Z"],["dc.date.available","2021-04-14T08:23:35Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s00586-020-06593-3"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/80974"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1432-0932"],["dc.relation.issn","0940-6719"],["dc.title","Cortical threaded pedicle screw improves fatigue strength in decreased bone quality"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","130"],["dc.bibliographiccitation.journal","Clinical Biomechanics"],["dc.bibliographiccitation.lastpage","139"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Roch, Paul Jonathan"],["dc.contributor.author","Wagner, Markus"],["dc.contributor.author","Weiland, Jan"],["dc.contributor.author","Gezzi, Riccardo"],["dc.contributor.author","Spiering, Stefan"],["dc.contributor.author","Lehmann, Wolfgang"],["dc.contributor.author","Saul, Dominik"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Wachowski, Martin Michael"],["dc.date.accessioned","2020-06-15T07:08:09Z"],["dc.date.available","2020-06-15T07:08:09Z"],["dc.date.issued","2020"],["dc.description.abstract","Information about kinematics in different functional spinal units before and after total disc arthroplasties is necessary to improve prostheses and determine indications. There is little information about the nonstationary instantaneous helical axis of rotation under lateral bending in the cervical spine before and after total disc arthroplasty."],["dc.identifier.doi","10.1016/j.clinbiomech.2020.01.007"],["dc.identifier.pmid","31982810"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66244"],["dc.language.iso","en"],["dc.relation.eissn","1879-1271"],["dc.relation.issn","0268-0033"],["dc.title","Total disc arthroplasties change the kinematics of functional spinal units during lateral bending"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","109608"],["dc.bibliographiccitation.journal","Journal of Biomechanics"],["dc.bibliographiccitation.volume","100"],["dc.contributor.author","Roch, Paul Jonathan"],["dc.contributor.author","Wagner, Markus"],["dc.contributor.author","Weiland, Jan"],["dc.contributor.author","Spiering, Stefan"],["dc.contributor.author","Lehmann, Wolfgang"],["dc.contributor.author","Saul, Dominik"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Wachowski, Martin Michael"],["dc.date.accessioned","2020-06-08T13:20:06Z"],["dc.date.available","2020-06-08T13:20:06Z"],["dc.date.issued","2020"],["dc.description.abstract","Total disc arthroplasty (TDA) increases the risk of adjacent segment disease (ASD). Kinematic analyses are necessary to compare the intact condition (IC) with alterations after TDA to develop better prostheses. A well-established 6D measuring apparatus (resolution < 2.4 μm; 400 positions/cycle) was used. Kinematics of the flexion and extension of 8 human cervical spine segments (cFSU) C3/C4 and C5/C6 (67.9 ± 13.2 y) were analyzed in the IC and after TDA (Bryan® Cervical Disc [B-TDA], Prestige LP® Cervical Disc [P-TDA]). The migration of the instantaneous helical axis (IHA) and the stiffness of the segments were calculated. Analyses demonstrated a stretched U-curved IHA migration in the sagittal plane. The IHA positions were significantly more cranial in cFSU C5/C6 than in C3/C4 in IC and after either TDA (IC: p < 0.001; B-TDA: p = 0.001; P-TDA: p = 0.045). In cFSU C3/C4 IHA positions shifted anteriocranially after either TDA (p < 0.001). In cFSU C5/C6, the IHA positions were significantly more anterocranial after B-TDA than in IC and after P-TDA (anterior: p < 0.001; cranial: p = 0.005). After B-TDA, the IHA migration path length was significantly longer in cFSU C3/C4 than in C5/C6 (p = 0.007) and longer than in IC in both cFSU (C3/C4: p = 0.047; C5/C6: p < 0.001). Stiffness was increased after both TDA. Various kinematic alterations were observed after both TDA. Increased translation and IHA position shifting after both TDA might indicate abnormal strain and a derogated benefit of TDA. These results imply the most abnormal strain after B-TDA. The lower cFSU might be more susceptible to alterations after TDA than the upper cFSU."],["dc.identifier.doi","10.1016/j.jbiomech.2020.109608"],["dc.identifier.pmid","31926589"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66200"],["dc.language.iso","en"],["dc.relation.eissn","1873-2380"],["dc.relation.issn","0021-9290"],["dc.title","Total disc arthroplasties alter the characteristics of the instantaneous helical axis of the cervical functional spinal units C3/C4 and C5/C6 during flexion and extension in in vitro conditions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]