Stress Distribution on the Screws in Posterior Lumbar Fusion of Isthmic Spondylolisthesis with 2- or 3-Vertebra Fixation Techniques: A Biomechanical Cadaveric Study

Wu, Zixiang; Ce, Z.; Geng, Changran; Liu, Da; Wan, Shengpeng; Zhang, Yang; Xiong, Zhi‐Gang; Lei, Wei

doi:10.1016/j.jss.2011.05.004

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…3, 4). A biomechanical in vitro study based on SG-technique glued directly on the neck of pedicle screw, confirmed that the stress on the caudal screw of a L2-L4 segment is significantly higher than at the intermediate one when axial compression is applied [36]: this confirms the result obtained in the full stabilization construct during standing.…”

Section: Discussionsupporting

confidence: 68%

Preclinical evaluation of posterior spine stabilization devices: can we compare in vitro and in vivo loads on the instrumentation?

Barbera

Galbusera

Wilke³

et al. 2016

Eur Spine J

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Section: Discussionsupporting

confidence: 68%

Preclinical evaluation of posterior spine stabilization devices: can we compare in vitro and in vivo loads on the instrumentation?

Barbera

Galbusera

Wilke³

et al. 2016

Eur Spine J

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“…Furthermore, due to strong stress-shielding effects caused by internal fixation, bone stress stimulation was significantly reduced, leading to bone reconstruction and absorption [ 13 ]. Biomechanical measurement of fusion techniques shows that all fusion will increase the stress of adjacent vertebrae [ 14 ]. Animal experiments also confirmed that strong internal fixation could cause stress occlusion and osteoporosis [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Ti-24Nb-4Zr-8Sn Alloy Pedicle Screw Improves Internal Vertebral Fixation by Reducing Stress-Shielding Effects in a Porcine Model

Zheng

Dong

et al. 2018

BioMed Research International

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To ensure the biomechanical properties of Ti-24Nb-4Zr-8Sn, stress-shielding effects were compared between Ti-24Nb-4Zr-8Sn and Ti-6Al-4V fixation by using a porcine model. Twelve thoracolumbar spines (T12–L5) of 12-month-old male pigs were randomly divided into two groups: Ti-24Nb-4Zr-8Sn (EG, n = 6) and Ti-6Al-4V (RG, n = 6) fixation. Pedicle screw was fixed at the outer edge of L4-5 vertebral holes. Fourteen measuring points were selected on the front of transverse process and middle and posterior of L4-5 vertebra. Electronic universal testing machine was used to measure the strain resistance of measuring points after forward and backward flexion loading of 150 N. Meanwhile, stress resistance was compared between both groups. The strain and stress resistance of measurement points 1, 2, 5, 6, 9, and 10–14 in Ti-24Nb-4Zr-8Sn fixation was lower than that of Ti-6Al-4V fixation after forward and backward flexion loading (P < 0.05). The strain and stress resistance of measurement points 3, 4, 7, and 8 was higher in Ti-24Nb-4Zr-8Sn fixation than that of Ti-6Al-4V fixation (P < 0.05). Stress-shielding effects of Ti-24Nb-4Zr-8Sn internal fixation were less than that of Ti-6Al-4V internal fixation. These results suggest that Ti-24Nb-4Zr-8Sn elastic fixation has more biomechanical goals than conventional Ti-6Al-4V internal fixation by reducing stress-shielding effects.

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Oblique Lateral Interbody Fusion versus Transforaminal Lumbar Interbody Fusion in Degenerative Lumbar Spondylolisthesis: A Single-Center Retrospective Comparative Study

She

et al. 2021

BioMed Research International

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Objective. To compare the efficacy of oblique lateral interbody fusion (OLIF) and transforaminal lumbar interbody fusion (TLIF) in single-level degenerative lumbar spondylolisthesis (DLS). Methods. A retrospective analysis of patients who underwent single-level DLS surgery in our department from 2015 to 2018 was performed. According to the surgical method, the enrolled patients were divided into two groups, namely, the OLIF group who underwent OLIF combined with percutaneous pedicle screw fixation (PPSF) and the TLIF group. Clinical outcomes included operation time, operation blood loss, postoperative drainage, hospital stay, visual analog scale (VAS) score, Oswestry disability index (ODI), and complications, and imaging outcomes included upper vertebral slip, intervertebral space height (ISH), intervertebral foramen height (IFH), intervertebral space angle (ISA), lumbar lordosis (LL), and bone fusion rate. All outcomes were recorded and analyzed. Results. A total of 65 patients were finally included, and there were 28 patients and 37 patients in the OLIF group and the TLIF group, respectively. The OLIF group showed shorter operation time, less blood loss, less postoperative drainage, and shorter hospital stay than the TLIF group ( P < 0.05 ). The ISH, IFH, ISA, and LL were all larger in the OLIF group at postoperative and last follow-up ( P < 0.05 ), but the degree of upper vertebral slip was found no difference between the two groups ( P > 0.05 ). The bone graft fusion rate of OLIF group and TLIF group at 3 months, 6 months, and last follow-up was 78.57%, 92.86%, and 100% and 70.27%, 86.49%, and 97.30%, respectively, and no significant differences were found ( P > 0.05 ). Compared with the TLIF group, the OLIF group showed a superior improvement in VAS and ODI at 1 month, 3 months, and 6 months postoperative ( P < 0.05 ), but no differences were found at 12 months postoperative and the last follow-up ( P > 0.05 ). There was no significant difference in complications between the two groups, with 4 patients and 6 patients in the OLIF group and TLIF group, respectively ( P > 0.05 ). Conclusions. Compared with TLIF, OLIF showed the advantages of less surgical invasion, better decompression effect, and faster postoperative recovery in single-level DLS surgery.

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Stress Distribution on the Screws in Posterior Lumbar Fusion of Isthmic Spondylolisthesis with 2- or 3-Vertebra Fixation Techniques: A Biomechanical Cadaveric Study

Cited by 4 publications

References 27 publications

Preclinical evaluation of posterior spine stabilization devices: can we compare in vitro and in vivo loads on the instrumentation?

Preclinical evaluation of posterior spine stabilization devices: can we compare in vitro and in vivo loads on the instrumentation?

Ti-24Nb-4Zr-8Sn Alloy Pedicle Screw Improves Internal Vertebral Fixation by Reducing Stress-Shielding Effects in a Porcine Model

Oblique Lateral Interbody Fusion versus Transforaminal Lumbar Interbody Fusion in Degenerative Lumbar Spondylolisthesis: A Single-Center Retrospective Comparative Study

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