Image-based modeling: A novel tool for realistic simulations of artificial bone cultures

TECHNOLOGY ◽  
2016 ◽  
Vol 04 (04) ◽  
pp. 229-233 ◽  
Author(s):  
Taseen A. Alam ◽  
Quang L. Pham ◽  
Vassilios I. Sikavitsas ◽  
Dimitrios V. Papavassiliou ◽  
Robert L. Shambaugh ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Computational Modeling ◽  
Bone Tissue ◽  
Ex Vivo ◽  
Present Report ◽  
Computer Assisted ◽  
Proof Of Concept ◽  
Artificial Bone ◽  
Image Based Modeling ◽  
Bone Cultures

Computational modeling has been promulgated as a means of optimizing artificial bone tissue culturing ex vivo. In the present report, we show, as a proof-of-concept, that it is possible to model the exact microenvironment within the scaffolds while accounting for their architectural complexities and the presence of cells/tissues in their pores. Our results clearly indicate that image-based modeling has the potential to be a powerful tool for computer-assisted tissue engineering.

scholarly journals Vascularization Strategies in Bone Tissue Engineering

Cells ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1749
Author(s):  
Filip Simunovic ◽  
Günter Finkenzeller
Keyword(s):  
Tissue Engineering ◽  
Blood Vessel ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Critical Size ◽  
Ex Vivo ◽  
Angiogenic Growth Factors ◽  
Hypoxic Conditions ◽  
Surgical Methods ◽  
Artificial Tissue

Bone is a highly vascularized tissue, and its development, maturation, remodeling, and regeneration are dependent on a tight regulation of blood vessel supply. This condition also has to be taken into consideration in the context of the development of artificial tissue substitutes. In classic tissue engineering, bone-forming cells such as primary osteoblasts or mesenchymal stem cells are introduced into suitable scaffolds and implanted in order to treat critical-size bone defects. However, such tissue substitutes are initially avascular. Because of the occurrence of hypoxic conditions, especially in larger tissue substitutes, this leads to the death of the implanted cells. Therefore, it is necessary to devise vascularization strategies aiming at fast and efficient vascularization of implanted artificial tissues. In this review article, we present and discuss the current vascularization strategies in bone tissue engineering. These are based on the use of angiogenic growth factors, the co-implantation of blood vessel forming cells, the ex vivo microfabrication of blood vessels by means of bioprinting, and surgical methods for creating surgically transferable composite tissues.

scholarly journals Enhancing X-ray Attenuation of 3D Printed Gelatin Methacrylate (GelMA) Hydrogels Utilizing Gold Nanoparticles for Bone Tissue Engineering Applications

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 367 ◽  
Author(s):  
Nehar Celikkin ◽  
Simone Mastrogiacomo ◽  
X. Walboomers ◽  
Wojciech Swieszkowski
Keyword(s):  
Tissue Engineering ◽  
Gold Nanoparticles ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Biological Properties ◽  
Proof Of Concept ◽  
New Bone Formation ◽  
X Ray ◽  
3D Printed ◽  
Low Toxicity

Bone tissue engineering is a rapidly growing field which is currently progressing toward clinical applications. Effective imaging methods for longitudinal studies are critical to evaluating the new bone formation and the fate of the scaffolds. Computed tomography (CT) is a prevailing technique employed to investigate hard tissue scaffolds; however, the CT signal becomes weak in mainly-water containing materials, which hinders the use of CT for hydrogels-based materials. Nevertheless, hydrogels such as gelatin methacrylate (GelMA) are widely used for tissue regeneration due to their optimal biological properties and their ability to induce extracellular matrix formation. To date, gold nanoparticles (AuNPs) have been suggested as promising contrast agents, due to their high X-ray attenuation, biocompatibility, and low toxicity. In this study, the effects of different sizes and concentrations of AuNPs on the mechanical properties and the cytocompatibility of the bulk GelMA-AuNPs scaffolds were evaluated. Furthermore, the enhancement of CT contrast with the cytocompatible size and concentration of AuNPs were investigated. 3D printed GelMA and GelMA-AuNPs scaffolds were obtained and assessed for the osteogenic differentiation of mesenchymal stem cells (MSC). Lastly, 3D printed GelMA and GelMA-AuNPs scaffolds were scanned in a bone defect utilizing µCT as the proof of concept that the GelMA-AuNPs are good candidates for bone tissue engineering with enhanced visibility for µCT imaging.

A Novel Approach for Computer-Assisted Template-Guided Autotransplantation of Teeth With Custom 3D Designed/Printed Surgical Tooling. An Ex Vivo Proof of Concept

2016 ◽  
Vol 74 (5) ◽  
pp. 895-902 ◽  
Author(s):  
David Anssari Moin ◽  
Wiebe Derksen ◽  
J.P. Verweij ◽  
Richard van Merkesteyn ◽  
Daniel Wismeijer
Keyword(s):  
Ex Vivo ◽  
Computer Assisted ◽  
Proof Of Concept ◽  
Novel Approach

scholarly journals Evolving applications of the egg: chorioallantoic membrane assay and ex vivo organotypic culture of materials for bone tissue engineering

2020 ◽  
Vol 11 ◽  
pp. 204173142094273
Author(s):  
Karen M Marshall ◽  
Janos M Kanczler ◽  
Richard OC Oreffo
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Organotypic Culture ◽  
Ex Vivo ◽  
Chorioallantoic Membrane ◽  
Experimental Methodology ◽  
Chick Chorioallantoic Membrane ◽  
Recent Developments ◽  
Chorioallantoic Membrane Assay

The chick chorioallantoic membrane model has been around for over a century, applied in angiogenic, oncology, dental and xenograft research. Despite its often perceived archaic, redolent history, the chorioallantoic membrane assay offers new and exciting opportunities for material and growth factor evaluation in bone tissue engineering. Currently, superior/improved experimental methodology for the chorioallantoic membrane assay are difficult to identify, given an absence of scientific consensus in defining experimental approaches, including timing of inoculation with materials and the analysis of results. In addition, critically, regulatory and welfare issues impact upon experimental designs. Given such disparate points, this review details recent research using the ex vivo chorioallantoic membrane assay and the ex vivo organotypic culture to advance the field of bone tissue engineering, and highlights potential areas of improvement for their application based on recent developments within our group and the tissue engineering field.

scholarly journals Current Trends in Bone Tissue Engineering

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Marco Mravic ◽  
Bruno Péault ◽  
Aaron W. James
Keyword(s):  
Tissue Engineering ◽  
Stem Cell ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Cell Biology ◽  
Wnt Signaling Pathway ◽  
Biologically Active ◽  
Translational Medical Research ◽  
Computer Assisted ◽  
Current Trends

The development of tissue engineering and regeneration constitutes a new platform for translational medical research. Effective therapies for bone engineering typically employ the coordinated manipulation of cells, biologically active signaling molecules, and biomimetic, biodegradable scaffolds. Bone tissue engineering has become increasingly dependent on the merging of innovations from each of these fields, as they continue to evolve independently. This foreword will highlight some of the most recent advances in bone tissue engineering and regeneration, emphasizing the interconnected fields of stem cell biology, cell signaling biology, and biomaterial research. These include, for example, novel methods for mesenchymal stem cell purification, new methods of Wnt signaling pathway manipulation, and cutting edge computer assisted nanoscale design of bone scaffold materials. In the following special issue, we sought to incorporate these diverse areas of emphasis in order to reflect current trends in the field.

Cell Culture–Based Tissue Engineering as an Alternative to Bone Grafts in Implant Dentistry: A Literature Review

2012 ◽  
Vol 38 (S1) ◽  
pp. 538-545 ◽  
Author(s):  
Daniel Gonçalves Boeckel ◽  
Rosemary Sadami Arai Shinkai ◽  
Márcio Lima Grossi ◽  
Eduardo Rolim Teixeira
Keyword(s):  
Tissue Engineering ◽  
Cell Culture ◽  
Literature Review ◽  
Bone Tissue ◽  
Ex Vivo ◽  
Maxillofacial Surgery ◽  
Cell Culture Techniques ◽  
Culture Techniques ◽  
Implant Dentistry ◽  
A New Technique

Several biomaterials and techniques for bone grafting have been described in the literature for atresic bone tissue replacement caused by edentulism, surgical resectioning, and traumas. A new technique involves tissue engineering, a promising option to replace bone tissue and solve problems associated with morbidity of autogenous grafting. This literature review aims to describe tissue-engineering techniques using ex vivo cell culture as an alternative to repair bone maxillary atresias and discuss the concepts and potentials of bone regeneration through cell culture techniques as an option for restorative maxillofacial surgery.

Computational modeling of media flow through perfusion-based bioreactors for bone tissue engineering

2020 ◽  
Vol 234 (12) ◽  
pp. 1397-1408
Author(s):  
Hanieh Nokhbatolfoghahaei ◽  
Mahboubeh Bohlouli ◽  
Kazem Adavi ◽  
Zahrasadat Paknejad ◽  
Maryam Rezai Rad ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Shear Stress ◽  
Fluid Flow ◽  
Computational Modeling ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Fluid Motion ◽  
Shear Loading ◽  
Perfusion Bioreactor ◽  
Perfusion Bioreactors

Bioreactor system has been used in bone tissue engineering in order to simulate dynamic nature of bone tissue environments. Perfusion bioreactors have been reported as the most efficient types of shear-loading bioreactor. Also, combination of forces, such as rotation plus perfusion, has been reported to enhance cell growth and osteogenic differentiation. Mathematical modeling using sophisticated infrastructure processes could be helpful and streamline the development of functional grafts by estimating and defining an effective range of bioreactor settings for better augmentation of tissue engineering. This study is aimed to conduct computational modeling for newly designed bioreactors in order to alleviate the time and material consuming for evaluating bioreactor parameters and effect of fluid flow hydrodynamics (various amounts of shear stress) on osteogenesis. Also, biological assessments were performed in order to validate similar parameters under implementing the perfusion or rotating and perfusion fluid motions in bioreactors’ prototype. Finite element method was used to investigate the effect of hydrodynamic of fluid flow inside the bioreactors. The equations used in the simulation to calculate the velocity values and consequently the shear stress values include Navier–Stokes and Brinkman equations. It has been shown that rotational fluid motion in rotating and perfusion bioreactor produces more velocity and shear stress compared with perfusion bioreactor. Moreover, implementing the perfusion together with rotational force in rotating and perfusion bioreactors has been shown to have more cell proliferation and higher activity of alkaline phosphatase enzyme as well as formation of extra cellular matrix sheet, as an indicator of bone-like tissue formation.

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