Viezens, Lennart Maximilian

[["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","57"],["dc.bibliographiccitation.journal","World Neurosurgery"],["dc.bibliographiccitation.lastpage","63"],["dc.bibliographiccitation.volume","94"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Dreimann, Marc"],["dc.contributor.author","Gessler, Roland"],["dc.contributor.author","Stangenberg, Martin"],["dc.contributor.author","Eicker, Sven Oliver"],["dc.date.accessioned","2018-11-07T10:07:22Z"],["dc.date.available","2018-11-07T10:07:22Z"],["dc.date.issued","2016"],["dc.description.abstract","BACKGROUND: The lumbar neural foraminal stenosis still is a challenging condition in minimally invasive spine surgery. Because of the anatomic situation a complete decompression of the nerve root often leads to a subtotal facetectomy associated with potential instability and the need for additional instrumentation of the decompressed segment. The iO-Flex system was introduced to address this problem by using a minimally invasive wire-guided microblade shaver to increase the neuroforaminal space by reducing the stenosis from intraforaminal while sparing bigger parts of the facet joint. In this study, we evaluated the feasibility and the surgical and radiological success in relation to the experience of the surgeon. METHODS: We performed decompression of the neuroforamen in 10 lumbar levels of 2 fresh-frozen human cadavers. Before and after decompression, we obtained high-resolution computed tomography data to evaluate the diameter of the neural foramen. RESULTS: The mean foraminal width (7.88-10.94 mm, P < 0.0001) and area (123.27-149.18 mm(2), P < 0.003) increased significantly after the decompression, whereas the facet joints area (131.9-107.51 mm(2), P < 0.005) and width (16.4-13.75 mm, P < 0.001) indeed decreased significantly but with an overall reduction of facet joint width by 16% and facet joint area by 18%. No complications such as nerve root damages or dural tears were observed. CONCLUSIONS: The flexible micro blade shaver system is feasible with a steep learning curve and achieves sufficient decompression of the neuroforamen in this cadaveric study."],["dc.identifier.doi","10.1016/j.wneu.2016.06.106"],["dc.identifier.isi","000390353200010"],["dc.identifier.pmid","27377224"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39261"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Inc"],["dc.relation.issn","1878-8769"],["dc.relation.issn","1878-8750"],["dc.title","Lumbar Neuroforaminal Decompression with a Flexible Microblade Shaver System: Results of a Cadaveric Study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["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"]]

[["dc.bibliographiccitation.firstpage","1094"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Der Unfallchirurg"],["dc.bibliographiccitation.lastpage","1095"],["dc.bibliographiccitation.volume","120"],["dc.contributor.author","Viezens, L."],["dc.contributor.author","Weiser, L."],["dc.contributor.author","Lehmann, W."],["dc.date.accessioned","2020-12-10T14:08:29Z"],["dc.date.available","2020-12-10T14:08:29Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1007/s00113-017-0431-1"],["dc.identifier.eissn","1433-044X"],["dc.identifier.issn","0177-5537"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70477"],["dc.language.iso","de"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Modifizierte Goel-Harms-Technik mit C1-Pedikelschrauben"],["dc.title.alternative","Modified Goel–Harms technique using C1 pedicle screws"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1964"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","European Spine Journal"],["dc.bibliographiccitation.lastpage","1971"],["dc.bibliographiccitation.volume","27"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Huber, Gerd"],["dc.contributor.author","Sellenschloh, Kay"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Püschel, Klaus"],["dc.contributor.author","Morlock, Michael M."],["dc.contributor.author","Lehmann, Wolfgang"],["dc.date.accessioned","2020-12-10T14:10:50Z"],["dc.date.available","2020-12-10T14:10:50Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1007/s00586-018-5660-7"],["dc.identifier.eissn","1432-0932"],["dc.identifier.issn","0940-6719"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70894"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Time to augment?! Impact of cement augmentation on pedicle screw fixation strength depending on bone mineral density"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","719"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Die Orthopädie"],["dc.bibliographiccitation.lastpage","726"],["dc.bibliographiccitation.volume","51"],["dc.contributor.author","Oberthür, Swantje"],["dc.contributor.author","Sehmisch, Stephan"],["dc.contributor.author","Weiser, Lukas"],["dc.contributor.author","Viezens, Lennart"],["dc.contributor.author","Stübig, Timo"],["dc.date.accessioned","2022-09-01T09:51:25Z"],["dc.date.available","2022-09-01T09:51:25Z"],["dc.date.issued","2022"],["dc.description.abstract","Hintergrund\r\n\r\nNavigationssysteme sollen die Präzision erhöhen und den Operateur bei der Durchführung bestimmter Eingriffe unterstützen. Unterschieden werden eine bildbasierte und eine bildfreie Navigation. Bildbasierte Verfahren beruhen auf 2‑D- bzw. heutzutage meist auf 3‑D-Systemen. Bei der bildfreien Navigation wird u. a. der 3‑D-Druck eingesetzt.\r\nIndikationen\r\n\r\nIn der Literatur existieren zahlreiche Studien zu Navigationsverfahren in der Unfallchirurgie. Während sich die Navigation in der Extremitätenchirurgie nicht durchsetzen konnte, ist der Einsatz der 3‑D-Navigation in der Becken- und Wirbelsäulenchirurgie etabliert. Vor allem bei Frakturen des hinteren Beckenringes (SI-Verschraubung) und bei dorsalen Stabilisierungsoperationen der Halswirbelsäule wird die Navigation regelmäßig angewendet.\r\nVoraussetzungen\r\n\r\nUm die Navigation optimal einsetzen zu können, sollte die Lernkurve abgeschlossen sein und die Technik regelmäßig angewendet werden. Zudem sollte der Chirurg die Operationstechnik sicher in konventioneller Technik beherrschen, um potenzielle Fehler der Navigation zu erkennen.\r\nVor- und Nachteile\r\n\r\nVorteile sind neben der erhöhten Patientensicherheit, die reduzierte Strahlenbelastung sowie eine geringere Invasivität chirurgischer Eingriffe. Als Nachteile sind unter ökonomischen Gesichtspunkten u. a. die hohen Anschaffungskosten anzuführen."],["dc.description.abstract","Background\r\n\r\nNavigation systems are supposed to increase precision and support surgeons while they perform certain interventions. 2D, or nowadays 3D, systems are used in image-based approaches. Image-free navigation uses 3D printing.\r\nIndications\r\n\r\nThere are several studies on navigation procedures in trauma surgery. In contrast to limb surgery, the use of 3D navigation in pelvic and spine surgery is already well established. Navigation is especially regularly used to treat fractures of the posterior pelvic ring and for posterior stabilization of the cervical spine.\r\nRequirements\r\n\r\nTo be able to utilize navigation systems optimally, the learning curve should be completed, and the technique should be used regularly. In addition, the surgeon should know the surgical technique without navigation in order to recognize potential errors of the navigation.\r\nAdvantages and disadvantages\r\n\r\nAdvantages include increased patient safety, reduction in radiation exposure and less invasive surgical procedures. However, among other disadvantages, initial costs are high."],["dc.identifier.doi","10.1007/s00132-022-04288-9"],["dc.identifier.pii","4288"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/113960"],["dc.language.iso","de"],["dc.notes.intern","DOI-Import GROB-597"],["dc.relation.eissn","2731-7153"],["dc.relation.issn","2731-7145"],["dc.relation.orgunit","Universitätsmedizin Göttingen"],["dc.relation.orgunit","Klinik für Unfallchirurgie, Orthopädie und Plastische Chirurgie"],["dc.rights.uri","https://www.springer.com/tdm"],["dc.title","Hat die Navigation in der Traumatologie noch einen Stellenwert?"],["dc.title.translated","Does navigation still have a value in trauma surgery?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]