Universität zu Köln

Wilmanns, Nadja, Beckmann, Agnes, Nicolini, Luis Fernando, Herren, Christian, Sobottke, Rolf, Hildebrand, Frank, Siewe, Jan, Kobbe, Philipp, Markert, Bernd and Stoffel, Marcus (2022). Biomechanical In Vitro and Finite Element Study on Different Sagittal Alignment Postures of the Lumbar Spine During Multiaxial Daily Motion. J. Biomech. Eng.-Trans. ASME, 144 (7). NEW YORK: ASME. ISSN 1528-8951

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Abstract

Lumbar lordotic correction (LLC), the gold standard treatment for sagittal spinal malalignment (SMA), and its effect on sagittal balance have been critically discussed in recent studies. This paper assesses the biomechanical response of the spinal components to LLC as an additional factor for the evaluation of LLC. Human lumbar spines (L2L5) were loaded with combined bending moments in flexion (Flex)/extension (Ex) or lateral bending (LatBend) and axial rotation (AxRot) in a physiological environment. We examined the dependency of AxRot range of motion (RoM) on the applied bending moment. The results were used to validate a finite element (FE) model of the lumbar spine. With this model, the biomechanical response of the intervertebral discs (IVD) and facet joints under daily motion was studied for different sagittal alignment postures, simulated by a motion in Flex/Ex direction. Applied bending moments decreased AxRot RoM significantly (all P < 0.001). A stronger decline of AxRot RoM for Ex than for Flex direction was observed (all P < 0.0001). Our simulated results largely agreed with the experimental data (all R-2 > 0.79). During the daily motion, the IVD was loaded higher with increasing lumbar lordosis (LL) for all evaluated values at L2L3 and L3L4 and posterior annulus stress (AS) at L4L5 (all P < 0.0476). The results of this study indicate that LLC with large extensions of LL may not always be advantageous regarding the biomechanical loading of the IVD. This finding may be used to improve the planning process of LLC treatments.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wilmanns, Nadja UNSPECIFIED UNSPECIFIED UNSPECIFIED Beckmann, Agnes UNSPECIFIED UNSPECIFIED UNSPECIFIED Nicolini, Luis Fernando UNSPECIFIED UNSPECIFIED UNSPECIFIED Herren, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Sobottke, Rolf UNSPECIFIED UNSPECIFIED UNSPECIFIED Hildebrand, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Siewe, Jan UNSPECIFIED UNSPECIFIED UNSPECIFIED Kobbe, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED Markert, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Stoffel, Marcus UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-681224
DOI:	10.1115/1.4053083
Journal or Publication Title:	J. Biomech. Eng.-Trans. ASME
Volume:	144
Number:	7
Date:	2022
Publisher:	ASME
Place of Publication:	NEW YORK
ISSN:	1528-8951
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PROXIMAL JUNCTIONAL KYPHOSIS; INTERVERTEBRAL DISC; STEPWISE REDUCTION; FACET JOINT; SEGMENT; RANGE; DEGENERATION; SURGERY; MODELS; SYSTEM Multiple languages Biophysics; Engineering, Biomedical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68122