Auxetic Polymeric Bone Stent for Tubular Fractures: Design, Fabrication and Structural Analysis

Munib, Zainab; Ali, Murtaza Najabat; Ansari, Umair; Mir, Mariam

doi:10.1080/03602559.2015.1021481

Cited by 14 publications

(10 citation statements)

References 19 publications

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“…A semi-permeable polyurethane film was bonded to the matrix. The use of polyurethane has been reported in many biomedical applications (Munib et al 2015 ). Favorable results were seen regarding “quality of life” (QOL) assessments and pain reduction (Jørgensen et al 2006 ).This is a significant finding since wound pain may potentiate a more aggravated sympathetic nervous system response and hence an increase in the release of catecholamines.…”

Section: Foamsmentioning

confidence: 99%

“…PEG enforced chitosan has been studied previously and the composite nature of the dressing has been shown to improve its mechanical properties. Composite biomaterials have the ability attain characteristics that may not be possible through the use of a single component (Petri 2015 ; Munib et al 2015 ). In this case, chitosan inhibited inflammatory cell infiltration and promoted fibroblast activity, while PEG enhanced the migration of epithelial cells.…”

Section: Bioactive Dressings Made From Natural Polymersmentioning

confidence: 99%

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Synthetic polymeric biomaterials for wound healing: a review

et al. 2018

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Wounds are of a variety of types and each category has its own distinctive healing requirements. This realization has spurred the development of a myriad of wound dressings, each with specific characteristics. It is unrealistic to expect a singular dressing to embrace all characteristics that would fulfill generic needs for wound healing. However, each dressing may approach the ideal requirements by deviating from the ‘one size fits all approach’, if it conforms strictly to the specifications of the wound and the patient. Indeed, a functional wound dressing should achieve healing of the wound with minimal time and cost expenditures. This article offers an insight into several different types of polymeric materials clinically used in wound dressings and the events taking place at cellular level, which aid the process of healing, while the biomaterial dressing interacts with the body tissue. Hence, the significance of using synthetic polymer films, foam dressings, hydrocolloids, alginate dressings, and hydrogels has been reviewed, and the properties of these materials that conform to wound-healing requirements have been explored. A special section on bioactive dressings and bioengineered skin substitutes that play an active part in healing process has been re-examined in this work.

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Section: Foamsmentioning

confidence: 99%

Section: Bioactive Dressings Made From Natural Polymersmentioning

confidence: 99%

Synthetic polymeric biomaterials for wound healing: a review

et al. 2018

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“…The second design selected was a rotating triangles geometry (15). A planar view of the film is shown in the schematic (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Rotating triangles geometry: ( A ) an array of unit cells; ( B ) 1 unit shown separately and magnified; ( C ) 1 unit cell is composed of 6 solid triangles in a circular, symmetrical arrangement surrounding a hollow central star-like shape. This figure shows the angles and vertices of the star that change when the geometry undergoes expansion (15). …”

Section: Methodsmentioning

confidence: 99%

“…A further analysis of the mechanical properties of balloon stenting (through Finite Elemental Analysis), in previous works has revealed two major drawbacks: end flaring or dog boning as a function of an increased length of balloon and the bending of stent ends due to under length expansion. Both of these problems prevent the stent from expanding over its full allowable range (15).…”

Section: Introductionmentioning

confidence: 99%

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A Biaxial Strain–Based Expansion Mechanism for Auxetic Stent Deployment

Bukhari

Ansari

Ali

et al. 2017

Journal of Applied Biomaterials & Functional Materials

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The expansion mechanism is similar in operation to the opening of an umbrella. The length of the connected auxetic stent increases when internal hydraulic pressure is applied. The degree of linear expansion in 1 direction influences the expansion of auxetic stent in the lateral direction. As the device exerts pressure longitudinally, a larger amount of the force is distributed on the unit cells/hinges which ultimately results in an increased expansion of the stent.

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On the application of additive manufacturing methods for auxetic structures: a review

2021

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Auxetic structures are a special class of structural components that exhibit a negative Poisson's ratio (NPR) because of their constituent materials, internal microstructure, or structural geometry. To realize such structures, specialized manufacturing processes are required to achieve a dimensional accuracy, reduction of material wastage, and a quicker fabrication. Hence, additive manufacturing (AM) techniques play a pivotal role in this context. AM is a layer-wise manufacturing process and builds the structure as per the designed geometry with appreciable precision and accuracy. Hence, it is extremely beneficial to fabricate auxetic structures using AM, which is otherwise a tedious and expensive task. In this study, a detailed discussion of the various AM techniques used in the fabrication of auxetic structures is presented. The advancements and advantages put forward by the AM domain have offered a plethora of opportunities for the fabrication and development of unconventional structures. Therefore, the authors have attempted to provide a meaningful encapsulation and a detailed discussion of the most recent of such advancements pertaining to auxetic structures. The article opens with a brief history of the growth of auxetic materials and later auxetic structures. Subsequently, discussions centering on the different AM techniques employed for the realization of auxetic structures are conducted. The basic principle, advantages, and disadvantages of these processes are discussed to provide an in-depth understanding of the current level of research. Furthermore, the performance of some of the prominent auxetic structures realized through these methods is discussed to compare their benefits and shortcomings. In addition, the influences of geometric and process parameters on such structures are evaluated through a comprehensive review to assess their feasibility for the latermentioned applications. Finally, valuable insights into the applications, limitations, and prospects of AM for auxetic structures are provided to enable the readers to gauge the vitality of such manufacturing as a production method.

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Auxetic Polymeric Bone Stent for Tubular Fractures: Design, Fabrication and Structural Analysis

Cited by 14 publications

References 19 publications

Synthetic polymeric biomaterials for wound healing: a review

Synthetic polymeric biomaterials for wound healing: a review

A Biaxial Strain–Based Expansion Mechanism for Auxetic Stent Deployment

On the application of additive manufacturing methods for auxetic structures: a review

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