Theoretical distribution of load in the radius and ulna carpal joint

Márquez-Flórez, Kalenia; Vergara-Amador, Enrique; Casas, Estevam Barbosa de Las; Garzón‐Alvarado, Diego Alexander

doi:10.1016/j.compbiomed.2015.02.016

Cited by 17 publications

(11 citation statements)

References 36 publications

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“…For this reason, the authors have also taken data from studies using other measurement techniques. Analytical studies have used rigid bodyspring models (RBSM) in 2D (Iwasaki et al, 1998a;Iwasaki et al, 1998b;Schuind et al, 1995;Watanabe et al, 1993) and then in 3D (Genda and Horii, 2000;Iwasaki et al, 1998b;Majima et al, 2008;Márquez-Florez et al, 2015). 2D studies, which are schematically based on a slice taken from the centre of the wrist in the antero-posterior direction, do not account for the load variation between the anterior, middle and posterior areas of the wrist, shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Conversely, 3D models take in account this distribution. With RBSMs, the bones are considered solid, while the cartilage and ligaments are considered as linear elastic materials (Márquez-Florez et al, 2015). This technique was used when the available computing power was less than it is today, and because there was insufficient computing power to work with finite elements.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Lunate loads following different osteotomies used to treat Kienböck's disease: A 3D finite element analysis

Camus

Aimar

Overstraeten

et al. 2020

Clinical Biomechanics

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Background: One of most accepted principles for treating Kienböck's disease before wrist degeneration settles in is to decompress the lunate by an osteotomy. Several osteotomies have been proposed since 1935. However, they are based on biomechanical hypotheses that are sometimes conflicting: This study compares the decompression effect of radius transverse shortening, radius lateral closing and medial closing wedge osteotomies, capitate shorteningwith and without hamate shorteningand a Camembert-type radius wedge osteotomy with and without ulnar head shortening according to Sennwald. Methods: We built a 3D wrist model using finite elements that included the metacarpal, carpal and forearm bones. All wrist ligaments and Triangular Fibrocartilage Complex were incorporated in the simulation. Load was applied on the metacarpals with the forearm bones fixed. We then applied the different osteotomies to the model. Findings: When load was applied to the wrist, the osteotomies that best unloaded the lunate were the capitate shortening osteotomy combined with hamate shortening and the Camembert osteotomy combined with ulna shortening; the latter was the only osteotomy that completely unloaded the lunate. Interpretation: We think the association of the radius Camembert osteotomy and ulna Sennwald's shortening osteotomy is the most effective procedure to propose in Kienböck's disease.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Lunate loads following different osteotomies used to treat Kienböck's disease: A 3D finite element analysis

Camus

Aimar

Overstraeten

et al. 2020

Clinical Biomechanics

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“…Models of biological stress can be built based on internal changes (metabolic, ionic gradients, membrane repair, among others) generated by resistance forces and the amount of energy spent on these changes. Predictive models can be built, and computer simulations can provide information about the average responsiveness of the living system to a specific stressor [18] Due immense diversity of living systems, the application of mathematical formalism to study stress in these systems seems impossible. But, the work of Epel et al [96], cited above, showed that, like the non-living systems studied in Physics, intense and/or prolonged stress can "deform" structures in the biological system, as the shortening that they observed in telomeres.…”

Section: Stress As a Principle Of Naturementioning

confidence: 99%

Biological Stress as a Principle of Nature: A Review of Literature

Cortez¹,

Silva²

2020

OJBIPHY

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This review paper attempts to approximate the concept of biological stress to the stress concept in Physics using the phenomenological view of physics to discuss the source of generator forces of biological stress state. Based on the literature, parallels are drawn between the two concepts and a discussion on the steady state in open systems and homeostatic state in biological systems is developed. Using the concepts of thermodynamic entropy and informational entropy, and comparing stress in living systems and nonliving, we attempt to build a basis for a view of stress as a principle of nature linked to the adaptability property of matter, opposing entropy. It is known that the increasing number of microstates possible in a complex system increases the entropy. In that way, entropy is related to the amount of additional information needed to specify the exact physical state of a system, given its macroscopic specification. By controlling the metabolic processes (catabolism-anabolism) to decrease the entropy, stress reduces the number of possible states for which the living system could evolve, avoiding the loss of "life information", preserving its characteristics and preventing its extinction. The loss of function of a species within an ecosystem or of cells within an organ can be showing that the limits of the stress principle were "transgressed". That is, the intensity and/or duration of stress exceeded the capacity of living organism to process of information extracted from stressor and reprogram its physiological mechanisms, activating its adaptability process, while its internal balance is preserved.

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“…For example, the structural mechanics enables wrist motion (Fischli et al, 2009; Majors and Wayne, 2011), provides stability to the carpal tunnel (Garcia-Elias et al, 1989a), and allows for force transmission between the hand and forearm during hand use, e.g. grasping (Horii et al, 1990; Marquez-Florez et al, 2015; Matsuki et al, 2009; Schuind et al, 1995). The intercarpal ligaments stabilize the wrist and facilitate the force transmission by preventing excessive carpal bone movement (Garcia-Elias, 2013); the loss of a single ligament can alter the mechanical balance of the wrist (Garcia-Elias et al, 1989a; Garcia-Elias et al, 1992; Gartsman et al, 1986).…”

Section: Introductionmentioning

confidence: 99%

“…The two-dimensional mechanics of the wrist have also been investigated with respect to the compliance of the carpal tunnel (Tung et al, 2010), force transmission across wrist (Garcia-Elias et al, 1989b; Schuind et al, 1995), and manipulation of the carpal tunnel's cross-sectional area (Li et al, 2013; Li et al, 2011; Li et al, 2009). Three-dimensional studies of the wrist structure have been mainly studied with computational modeling with a particular focus on force transmission across the carpus (Fischli et al, 2009; Guo et al, 2009; Majima et al, 2008; Majors and Wayne, 2011; Marquez-Florez et al, 2015; Matsuki et al, 2009). However, there is a lack of experimental studies investigating the three-dimensional biomechanics of the wrist structure.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional stiffness of the carpal arch

Gabra

2016

Journal of Biomechanics

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The carpal arch of the wrist is formed by irregularly shaped carpal bones interconnected by numerous ligaments, resulting in complex structural mechanics. The purpose of this study was to determine the three-dimensional stiffness characteristics of the carpal arch using displacement perturbations. It was hypothesized that the carpal arch would exhibit an anisotropic stiffness behavior with principal directions that are oblique to the conventional anatomical axes. Eight (n = 8) cadavers were used in this study. For each specimen, the hamate was fixed to a custom stationary apparatus. An instrumented robot arm applied three-dimensional displacement perturbations to the ridge of trapezium and corresponding reaction forces were collected. The displacement-force data were used to determine a three-dimensional stiffness matrix using least squares fitting. Eigendecomposition of the stiffness matrix was used to identify the magnitudes and directions of the principal stiffness components. The carpal arch structure exhibited anisotropic stiffness behaviors with a maximum principal stiffness of 16.4 ± 4.6 N/mm that was significantly larger than the other principal components of 3.1 ± 0.9 and 2.6 ± 0.5 N/mm (p < 0.001). The principal direction of the maximum stiffness was pronated within the cross section of the carpal tunnel which is accounted for by the stiff transverse ligaments that tightly bind distal carpal arch. The minimal principal stiffness is attributed to the less constraining articulation between the trapezium and scaphoid. This study provides advanced characterization of the wrist's three-dimensional structural stiffness for improved insight into wrist biomechanics, stability, and function.

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Theoretical distribution of load in the radius and ulna carpal joint

Cited by 17 publications

References 36 publications

Lunate loads following different osteotomies used to treat Kienböck's disease: A 3D finite element analysis

Lunate loads following different osteotomies used to treat Kienböck's disease: A 3D finite element analysis

Biological Stress as a Principle of Nature: A Review of Literature

Three-dimensional stiffness of the carpal arch

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