Resistance and compression of the lumbar vertebrae

Perey, Olof

doi:10.1007/978-3-642-65718-4_5

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…Cements for orthopaedic luting applications have some very specific requirements. High radiopacity [3], low-curing temperature [4], nontoxic nature [5], adhesive properties [6], a sufficient working time (6-10 min) [3], a rapid setting time (15 min) [3], a high viscosity (required for injection and interpenetration of trabecular spaces) [7], sufficient strength [8][9][10][11], a modulus of elasticity similar to the surrounding bone [12][13][14] and good biocompatibility/bioactivity are required for such applications [3].…”

Section: Introductionmentioning

confidence: 99%

Strontium-based Glass Polyalkenoate Cements for Luting Applications in the Skeleton

2008

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Glass Polyalkenoate Cements (GPCs) based on strontium calcium zinc silicate (Sr-Ca-Zn-SiO2) glasses and high molecular weight poly(acrylic acid) (PAA) have been shown to exhibit suitable mechanical properties for orthopaedic arthroplasty applications, however for vertebroplasty and other medical luting applications these cements have working and setting times which are unsuitable for such applications. In this study GPCs based on Sr-Ca-Zn-SiO2 glasses and low molecular weight PAA were evaluated for orthopaedic luting applications. GPCs based on four different glasses; BT100 (0.16CaO, 0.36ZnO, 0.48SiO2), BT101 (0.04SrO, 0.12CaO, 0.36ZnO, 0.48SiO2), BT102 (0.08SrO 0.08CaO, 0.36ZnO, 0.48SiO2) and BT103 (0.12SrO 0.04CaO, 0.36ZnO, 0.48SiO2) and two PAAs (MW; 12,700 and 25,700) were examined. These cement formulations exhibited handling properties potentially suitable for luting applications as well as mechanical strengths which were similar to those of trabecular bone. Upon immersion in simulated body fluid, the GPCs showed sustained growth of a calcium phosphate layer on the surface of the cement indicating that these cements were bioactive in nature.

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Section: Introductionmentioning

confidence: 99%

Strontium-based Glass Polyalkenoate Cements for Luting Applications in the Skeleton

2008

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“…The progressive increase in size directly correlates with strength and the axial load-resisting ability of the spine. [9][10][11][12][13][14] This phenomenon is also at least partially responsible for the decreased incidence of fractures of the lower lumbar spine.…”

Section: Vertebral Bodymentioning

confidence: 98%

Biomechanics of the Spine

Kowalski¹,

Ferrara²,

Benzel³

2005

Neurosurgery Quarterly

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“…As already discussed, the trabecular structure of vertebral bodies gives the best resistance/ weight ratio. The load-bearing capacity of vertebral bodies is well correlated to body size 24,25,31 ( figure 24).…”

Section: The Intrinsic Strength Of the Spinal Elementsmentioning

confidence: 99%

“…In osteoporosis a simultaneous resorption of both horizontal lamellae and vertical columns occurs with simultaneous thinning and lengthening of the columns, mostly in the central body causing a prevalence of central endplate failures (figures 25,26). When the normal disc is put under a symmetric compression, the central part transmits pressure in all directions and the annulus fibres enter into tension 13,16 .…”

Section: The Intrinsic Strength Of the Spinal Elementsmentioning

confidence: 99%

Biomechanics of the Spine II

Izzo

Diano

Lacquaniti

et al. 2005

Rivista di Neuroradiologia

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Spine biomechanics represents a traditional area of research by orthopaedists, neurosurgeons, bioengineers and physicists. Working in an emergency setting and managing spinal traumas every day we began a study on extended literature devoted to biomechanics of the spine, to see beyond the usual static evaluation of neuroimaging patterns. After our earlier paper on biomechanics of the spine16, we have reviewed and broadened some topics such as the role of the ligaments and introduced the main mechanisms of primary spinal traumas and deformations. The spine is a multiarticular complex structure controlled by the muscles whose correct function presupposes its stability. Several “stability factors” ensure spinal stability and correct movements. A number of biomechanical studies analysed the contribution of individual bony and soft spinal elements to stability and the effects of traumas. Several theories have been derived from these studies to account for the distribution of loads and vector forces, including failure-producing loads, among the components of functional spinal units (FSU). Holdsworth's initial two column concept, the three column models by Louis and Denis up to most recent four column theory by Cartolari all represent evolutions in assessing the distribution of loads and the presence and degree of instability in spinal traumas. Whether acute or chronic spinal instability means a partial or complete loss of one or both functions of the spine: load-bearing and cord protection. The diagnosis of spinal instability is crucial to establish the most appropriate strategy of management, namely in acute conditions. Biomechanical concepts are fundamental to understand the factors deciding the type, location and extent of spinal traumas, possible instability and the primary mechanism of the main types of injuries.

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Resistance and compression of the lumbar vertebrae

Cited by 4 publications

References 22 publications

Strontium-based Glass Polyalkenoate Cements for Luting Applications in the Skeleton

Strontium-based Glass Polyalkenoate Cements for Luting Applications in the Skeleton

Biomechanics of the Spine

Biomechanics of the Spine II

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