1
|
Selvaprithiviraj V, Vaquette C, Ivanovski S. Hydrogel based soft tissue expanders for orodental reconstruction. Acta Biomater 2023; 172:53-66. [PMID: 37866723 DOI: 10.1016/j.actbio.2023.10.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/10/2023] [Accepted: 10/17/2023] [Indexed: 10/24/2023]
Abstract
Tension-free flap closure to prevent soft tissue dehiscence is a prerequisite for successful bone augmentation in orodental reconstructive surgery. Since soft tissue contour follows the underlying jaw bony architecture, resorption of alveolar (jaw) bone limits the availability of soft tissue for wound closure following major bone reconstruction, required to facilitate oral rehabilitation with endosseous dental implants following tooth loss. Although there are several clinical procedures to increase soft tissue volume, these techniques are complicated and technically demanding. Soft tissue expansion, an established technique in reconstructive surgery, is an ideal alternative to generate surplus soft tissue prior to bone augmentation and dental implant placement. Increase in tissue volume can be achieved by using soft tissue expanders (STEs). Contemporary STEs have evolved from silicone balloons to osmotically inflating hydrogel-based systems. Here, we provide an overview of STEs in clinical oral surgery, outline the current research in STEs, and an update on recent clinical trials as well as the associated complications. Also, the mechanism governing soft tissue expansion and the critical factors that control the expansion process are covered. Design considerations for STEs for intraoral applications are given particular attention. Finally, we present our perspectives on utilization of minimally invasive methods to administer STEs for orodental applications. STATEMENT OF SIGNIFICANCE: Soft tissue expansion is required for a range of reconstructive applications and more notably in regenerative dentistry for vertical bone augmentation. This review describes the commercially available soft tissue expanders along with the latest systems being currently developed. This review insightfully discusses the biological and physical mechanisms leading to soft tissue expansion and critically assesses the design criteria of soft tissue expanders. A particular focus is given on the development of a new generation of hydrogel-based soft tissue expanders; their chemistry and required physical properties for tissue expansion is described and the obstacles towards clinical translations are identified. Finally, the review elaborates on promising minimally invasive injectable hydrogel-based tissue expanders and highlights the beneficial features of these systems.
Collapse
Affiliation(s)
- Vignesh Selvaprithiviraj
- The University of Queensland, School of Dentistry, Centre for Oral Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD, Australia
| | - Cedryck Vaquette
- The University of Queensland, School of Dentistry, Centre for Oral Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD, Australia; Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD, Australia, S. Ivanovski, School of Dentistry, University of Queensland, 288 Herston Rd, Herston, Brisbane, QLD 4072, Australia
| | - Saso Ivanovski
- The University of Queensland, School of Dentistry, Centre for Oral Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD, Australia.
| |
Collapse
|
2
|
Trubelja A, Kasper FK, Farach-Carson MC, Harrington DA. Bringing hydrogel-based craniofacial therapies to the clinic. Acta Biomater 2022; 138:1-20. [PMID: 34743044 PMCID: PMC9234983 DOI: 10.1016/j.actbio.2021.10.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/06/2021] [Accepted: 10/29/2021] [Indexed: 01/17/2023]
Abstract
This review explores the evolution of the use of hydrogels for craniofacial soft tissue engineering, ranging in complexity from acellular injectable fillers to fabricated, cell-laden constructs with complex compositions and architectures. Addressing both in situ and ex vivo approaches, tissue restoration secondary to trauma or tumor resection is discussed. Beginning with relatively simple epithelia of oral mucosa and gingiva, then moving to more functional units like vocal cords or soft tissues with multilayer branched structures, such as salivary glands, various approaches are presented toward the design of function-driven architectures, inspired by native tissue organization. Multiple tissue replacement paradigms are presented here, including the application of hydrogels as structural materials and as delivery platforms for cells and/or therapeutics. A practical hierarchy is proposed for hydrogel systems in craniofacial applications, based on their material and cellular complexity, spatial order, and biological cargo(s). This hierarchy reflects the regulatory complexity dictated by the Food and Drug Administration (FDA) in the United States prior to commercialization of these systems for use in humans. The wide array of available biofabrication methods, ranging from simple syringe extrusion of a biomaterial to light-based spatial patterning for complex architectures, is considered within the history of FDA-approved commercial therapies. Lastly, the review assesses the impact of these regulatory pathways on the translational potential of promising pre-clinical technologies for craniofacial applications. STATEMENT OF SIGNIFICANCE: While many commercially available hydrogel-based products are in use for the craniofacial region, most are simple formulations that either are applied topically or injected into tissue for aesthetic purposes. The academic literature previews many exciting applications that harness the versatility of hydrogels for craniofacial soft tissue engineering. One of the most exciting developments in the field is the emergence of advanced biofabrication methods to design complex hydrogel systems that can promote the functional or structural repair of tissues. To date, no clinically available hydrogel-based therapy takes full advantage of current pre-clinical advances. This review surveys the increasing complexity of the current landscape of available clinical therapies and presents a framework for future expanded use of hydrogels with an eye toward translatability and U.S. regulatory approval for craniofacial applications.
Collapse
Affiliation(s)
- Alen Trubelja
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, UTHealth Science Center at Houston, Houston, TX 77054, United States; Department of Bioengineering, Rice University, Houston, TX 77005, United States
| | - F Kurtis Kasper
- Department of Orthodontics, School of Dentistry, UTHealth Science Center at Houston, Houston, TX 77054, United States
| | - Mary C Farach-Carson
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, UTHealth Science Center at Houston, Houston, TX 77054, United States; Department of Bioengineering, Rice University, Houston, TX 77005, United States; Department of BioSciences, Rice University, Houston, TX 77005, United States
| | - Daniel A Harrington
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, UTHealth Science Center at Houston, Houston, TX 77054, United States; Department of Bioengineering, Rice University, Houston, TX 77005, United States; Department of BioSciences, Rice University, Houston, TX 77005, United States.
| |
Collapse
|
3
|
Chang Y, Zhang F, Liu F, Shi L, Zhang L, Zhu H. Self-swelling tissue expander for soft tissue reconstruction in the craniofacial region: An in vitro and in vivo evaluation. Biomed Mater Eng 2021; 33:77-90. [PMID: 34250925 DOI: 10.3233/bme-211224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Craniofacial soft-tissue defects mostly have an impact on the treatment of various oral diseases. Tissue expander is an important technique for tissue reconstruction, especially for soft tissues in reconstructive surgery. OBJECTIVE This research aimed to develop a new self-swelling tissue expander, namely hydrogel, for soft tissue reconstruction in craniofacial region. METHODS In vitro, the chemical and physical characteristics of hydrogel were evaluated by SEM, swelling rate, mechanical testing, EDS, and FT-IR. In vivo, the craniofacial implant model of SD rats were divided into group A as control, group B with hydrogels for 1 week expansion, group C for 2 weeks and group D for 4 weeks (n = 5), and the effects were analyzed by HE staining, histological and radiographic evaluation. RESULTS The in vitro results suggested that dry hydrogel possessed a uniform surface with micropores, the surface of post-swelling hydrogel formed three-dimensional meshwork. Within 24 hours, hydrogels expanded markedly, then slowed down. The mechanical property of hydrogels with longer expansion was better, whose main elements were carbon and oxygen. FT-IR also verified its molecular structure. In vivo, the wounds of rats recovered well, hydrogels could be removed as one whole piece with original shape and examined by radiographic evaluation, besides, the expanded skin and developed fibrous capsule formed surrounding hydrogels. CONCLUSION The new expander was designed successfully with good chemical and physical characteristics, and could be applied in an animal model to help tissue reconstruction.
Collapse
Affiliation(s)
- Yili Chang
- Department of Ophthalmology, Affiliated Eye Hospital of Nanchang University, China.,The Graduate School of Nanchang University, China
| | - Fubao Zhang
- The Graduate School of Nanchang University, China.,Department of Stomatology, The Third Affiliated Hospital of Nanchang University, China
| | - Feng Liu
- College of Chemistry, Nanchang University, China
| | - Lianshui Shi
- Department of Prosthodontics, Affiliated Stomatological Hospital of Nanchang University, China
| | - Lin Zhang
- Department of Prosthodontics, Affiliated Stomatological Hospital of Nanchang University, China
| | - Hongshui Zhu
- Department of Prosthodontics, Affiliated Stomatological Hospital of Nanchang University, China
| |
Collapse
|
4
|
Muscle-inspired double-network hydrogels with robust mechanical property, biocompatibility and ionic conductivity. Carbohydr Polym 2021; 262:117936. [PMID: 33838813 DOI: 10.1016/j.carbpol.2021.117936] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/23/2021] [Accepted: 03/10/2021] [Indexed: 12/13/2022]
Abstract
Inspired by muscle architectures, double network hydrogels with hierarchically aligned structures were fabricated, where cross-linked cellulose nanofiber (CNF)/chitosan hydrogel threads obtained by interfacial polyelectrolyte complexation spinning were collected in alignment as the first network, while isotropic poly(acrylamide-co-acrylic acid) (PAM-AA) served as the second network. After further cross-linking using Fe3+, the hydrogel showed an outstanding mechanical performance, owing to effective energy dissipation of the oriented asymmetric double networks. The average strength and elongation-at-break of PAM-AA/CNF/Fe3+ hydrogel were 11 MPa and 480 % respectively, which the strength was comparative to that of biological tissues. The aligned CNFs in the hydrogels provided probable ion transport channels, contributing to the high ionic conductivity, which was up to 0.022 S/cm when the content of LiCl was 1.5 %. Together with superior biocompatibility, the well-ordered hydrogel showed a promising potential in biological applications, such as artificial soft tissue materials and muscle-like sensors for human motion monitoring.
Collapse
|
5
|
Nagakawa Y, Kato M, Suye SI, Fujita S. Fabrication of tough, anisotropic, chemical-crosslinker-free poly(vinyl alcohol) nanofibrous cryogels via electrospinning. RSC Adv 2020; 10:38045-38054. [PMID: 35515152 PMCID: PMC9057196 DOI: 10.1039/d0ra07322a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 10/09/2020] [Indexed: 12/18/2022] Open
Abstract
PVA hydrogels with anisotropic structures have many biomedical applications; however, the hydrophilicity of PVA nanofibers degrades their mechanical properties, and the residual unreacted chemical crosslinkers are disadvantageous for medical use. Therefore, maintaining the stability of aqueous solutions without using crosslinkers is essential while synthesizing electrospun anisotropic PVA nanofibers. Herein, we developed a novel fabrication method for synthesizing tough, anisotropic, and chemical-crosslinker-free nanofibrous cryogels composed of poly(vinyl alcohol) (PVA) and glycerol (Gly) via electrospinning in conjunction with freeze-thawing treatment. Wide-angle X-ray diffraction, attenuated total reflection Fourier-transform infrared spectroscopy, and differential scanning calorimetry analysis revealed an enhanced crystallinity of the PVA and hydrogen bonds in the PVA/Gly nanofibers after freeze-thawing, thereby leading to improved stability of the PVA/Gly nanofiber in water. The scanning electron microscopy observation and tensile tests revealed that the addition of Gly improved both the orientation and the mechanical properties. The values of the toughness parallel and vertical to the fiber axis direction were 4.20 ± 0.63 MPa and 2.17 ± 0.27 MPa, respectively, thus revealing the anisotropy of this mechanical property. The PVA/Gly nanofibrous cryogel consisted of physically crosslinked biocompatible materials featuring toughness and mechanical anisotropy, which are favorable for medical applications including tissue engineering.
Collapse
Affiliation(s)
- Yoshiyasu Nagakawa
- Biotechnology Group, Tokyo Metropolitan Industrial Technology Research Institute 2-4-10, Aomi Koto-ku Tokyo 135-0064 Japan.,Department of Frontier Fiber Technology and Sciences, Graduate School of Engineering University of Fukui 3-9-1, Bunkyo Fukui 910-8507 Japan
| | - Mikiya Kato
- Department of Frontier Fiber Technology and Sciences, Graduate School of Engineering University of Fukui 3-9-1, Bunkyo Fukui 910-8507 Japan
| | - Shin-Ichiro Suye
- Department of Frontier Fiber Technology and Sciences, Graduate School of Engineering University of Fukui 3-9-1, Bunkyo Fukui 910-8507 Japan .,Life Science Innovation Center, University of Fukui 3-9-1, Bunkyo Fukui 910-8507 Japan
| | - Satoshi Fujita
- Department of Frontier Fiber Technology and Sciences, Graduate School of Engineering University of Fukui 3-9-1, Bunkyo Fukui 910-8507 Japan .,Life Science Innovation Center, University of Fukui 3-9-1, Bunkyo Fukui 910-8507 Japan
| |
Collapse
|
6
|
Inflammatory Responses in Oro-Maxillofacial Region Expanded Using Anisotropic Hydrogel Tissue Expander. MATERIALS 2020; 13:ma13194436. [PMID: 33036128 PMCID: PMC7579169 DOI: 10.3390/ma13194436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/01/2020] [Accepted: 09/04/2020] [Indexed: 11/17/2022]
Abstract
OBJECTIVE Reconstruction of oral and facial defects often necessitate replacement of missing soft tissue. The purpose of tissue expanders is to grow healthy supplementary tissue under a controlled force. This study investigates the inflammatory responses associated with the force generated from the use of anisotropic hydrogel tissue expanders. METHODS Sprague Dawley rats (n = 7, body weight = 300 g ± 50 g) were grouped randomly into two groups-control (n = 3) and expanded (n = 4). Anisotropic hydrogel tissue expanders were inserted into the frontal maxillofacial region of the rats in the expanded group. The rats were sacrificed, and skin samples were harvested, fixed in formalin, and embedded in paraffin wax for histological investigation. Hematoxylin and eosin staining was performed to detect histological changes between the two groups and to investigate the inflammatory response in the expanded samples. Three inflammatory markers, namely interleukin (IL)-1α, IL-6, and tumor necrosis factor-α (TNF-α), were analyzed by immunohistochemistry. RESULT IL-1-α expression was only observed in the expanded tissue samples compared to the controls. In contrast, there was no significant difference in IL-6, and TNF-α production. Histological analysis showed the absence of inflammatory response in expanded tissues, and a negative non-significant correlation (Spearman's correlation coefficient) between IL-1-α immune-positive cells and the inflammatory cells (r = -0.500). In conclusion, tissues that are expanded and stabilized using an anisotropic self-inflating hydrogel tissue expander might be useful for tissue replacement and engraftment as the expanded tissue does not show any sign of inflammatory responses. Detection of IL-1-α in the expanded tissues warrants further investigation for its involvement without any visible inflammatory response.
Collapse
|
7
|
Colazo JM, Evans BC, Farinas AF, Al-Kassis S, Duvall CL, Thayer WP. Applied Bioengineering in Tissue Reconstruction, Replacement, and Regeneration. TISSUE ENGINEERING PART B-REVIEWS 2020; 25:259-290. [PMID: 30896342 DOI: 10.1089/ten.teb.2018.0325] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IMPACT STATEMENT The use of autologous tissue in the reconstruction of tissue defects has been the gold standard. However, current standards still face many limitations and complications. Improving patient outcomes and quality of life by addressing these barriers remain imperative. This article provides historical perspective, covers the major limitations of current standards of care, and reviews recent advances and future prospects in applied bioengineering in the context of tissue reconstruction, replacement, and regeneration.
Collapse
Affiliation(s)
- Juan M Colazo
- 1Vanderbilt University School of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,2Medical Scientist Training Program, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Brian C Evans
- 3Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | - Angel F Farinas
- 4Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Salam Al-Kassis
- 4Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Craig L Duvall
- 3Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | - Wesley P Thayer
- 3Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee.,4Department of Plastic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| |
Collapse
|
8
|
Nagakawa Y, Fujita S, Yunoki S, Tsuchiya T, Suye S, Itoi T. Self‐expandable hydrogel biliary stent design utilizing the swelling property of poly(vinyl alcohol) hydrogel. J Appl Polym Sci 2019. [DOI: 10.1002/app.48851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yoshiyasu Nagakawa
- Biotechnology GroupTokyo Metropolitan Industrial Technology Research Institute 2‐4‐10, Aomi, Koto‐ku Tokyo 135‐0064 Japan
- Department of Frontier Fiber Technology and SciencesGraduate School of Engineering, University of Fukui 3‐9‐1, Bunkyo Fukui 910‐8507 Japan
| | - Satoshi Fujita
- Department of Frontier Fiber Technology and SciencesGraduate School of Engineering, University of Fukui 3‐9‐1, Bunkyo Fukui 910‐8507 Japan
- Life Science Innovation CenterUniversity of Fukui 3‐9‐1, Bunkyo Fukui 910‐8507 Japan
| | - Shunji Yunoki
- Biotechnology GroupTokyo Metropolitan Industrial Technology Research Institute 2‐4‐10, Aomi, Koto‐ku Tokyo 135‐0064 Japan
| | - Takayoshi Tsuchiya
- Department of Gastroenterology and HepatologyTokyo Medical University 6‐7‐1, Nishishinjuku, Shinjuku‐ku Tokyo 160‐0023 Japan
| | - Shin‐ichiro Suye
- Department of Frontier Fiber Technology and SciencesGraduate School of Engineering, University of Fukui 3‐9‐1, Bunkyo Fukui 910‐8507 Japan
- Life Science Innovation CenterUniversity of Fukui 3‐9‐1, Bunkyo Fukui 910‐8507 Japan
| | - Takao Itoi
- Department of Gastroenterology and HepatologyTokyo Medical University 6‐7‐1, Nishishinjuku, Shinjuku‐ku Tokyo 160‐0023 Japan
| |
Collapse
|
9
|
Hrib J, Chylikova Krumbholcova E, Duskova-Smrckova M, Hobzova R, Sirc J, Hruby M, Michalek J, Hodan J, Lesny P, Smucler R. Hydrogel Tissue Expanders for Stomatology. Part II. Poly(styrene-maleic anhydride) Hydrogels. Polymers (Basel) 2019; 11:polym11071087. [PMID: 31247964 PMCID: PMC6680895 DOI: 10.3390/polym11071087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/14/2019] [Accepted: 06/22/2019] [Indexed: 11/16/2022] Open
Abstract
Self-inflating soft tissue expanders represent a valuable modality in reconstructive surgery. For this purpose, particularly synthetic hydrogels that increase their volume by swelling in aqueous environment are used. The current challenge in the field is to deliver a material with a suitable protracted swelling response, ideally with an induction period (for sutured wound healing) followed by a linear increase in volume lasting several days for required tissue reconstruction. Here, we report on synthesis, swelling, thermal, mechanical and biological properties of novel hydrogel tissue expanders based on poly(styrene-alt-maleic anhydride) copolymers covalently crosslinked with p-divinylbenzene. The hydrogels exerted hydrolysis-driven swelling response with induction period over the first two days with minimal volume change and gradual volume growth within 30 days in buffered saline solution. Their final swollen volume reached more than 14 times the dry volume with little dependence on the crosslinker content. The mechanical coherence of samples during swelling and in their fully swollen state was excellent, the compression modulus of elasticity being between 750 and 850 kPa. In vitro cell culture experiments and in vivo evaluation in mice models showed excellent biocompatibility and suitable swelling responses meeting thus the application requirements as soft tissue expanders.
Collapse
Affiliation(s)
- Jakub Hrib
- Institute of Macromolecular Chemistry AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | | | | | - Radka Hobzova
- Institute of Macromolecular Chemistry AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic.
| | - Jakub Sirc
- Institute of Macromolecular Chemistry AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Martin Hruby
- Institute of Macromolecular Chemistry AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jiri Michalek
- Institute of Macromolecular Chemistry AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jiri Hodan
- Institute of Macromolecular Chemistry AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Petr Lesny
- Institute of Hematology and Blood Transfusion, U nemocnice 2094/1, 128 20 Prague 2, Czech Republic
| | - Roman Smucler
- 1st Faculty of Medicine, Charles University in Prague, Katerinska 32, 121 08 Prague 2, Czech Republic
| |
Collapse
|
10
|
High-strength and self-recoverable silk fibroin cryogels with anisotropic swelling and mechanical properties. Int J Biol Macromol 2019; 122:1279-1289. [DOI: 10.1016/j.ijbiomac.2018.09.087] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/01/2018] [Accepted: 09/14/2018] [Indexed: 11/21/2022]
|
11
|
Kong W, Wang C, Jia C, Kuang Y, Pastel G, Chen C, Chen G, He S, Huang H, Zhang J, Wang S, Hu L. Muscle-Inspired Highly Anisotropic, Strong, Ion-Conductive Hydrogels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801934. [PMID: 30101467 DOI: 10.1002/adma.201801934] [Citation(s) in RCA: 199] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/02/2018] [Indexed: 05/26/2023]
Abstract
Biological tissues generally exhibit excellent anisotropic mechanical properties owing to their well-developed microstructures. Inspired by the aligned structure in muscles, a highly anisotropic, strong, and conductive wood hydrogel is developed by fully utilizing the high-tensile strength of natural wood, and the flexibility and high-water content of hydrogels. The wood hydrogel exhibits a high-tensile strength of 36 MPa along the longitudinal direction due to the strong bonding and cross-linking between the aligned cellulose nanofibers (CNFs) in wood and the polyacrylamide (PAM) polymer. The wood hydrogel is 5 times and 500 times stronger than the bacterial cellulose hydrogels (7.2 MPa) and the unmodified PAM hydrogel (0.072 MPa), respectively, representing one of the strongest hydrogels ever reported. Due to the negatively charged aligned CNF, the wood hydrogel is also an excellent nanofluidic conduit with an ionic conductivity of up to 5 × 10-4 S cm-1 at low concentrations for highly selective ion transport, akin to biological muscle tissue. The work offers a promising strategy to fabricate a wide variety of strong, anisotropic, flexible, and ionically conductive wood-based hydrogels for potential biomaterials and nanofluidic applications.
Collapse
Affiliation(s)
- Weiqing Kong
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Chengwei Wang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Chao Jia
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Yudi Kuang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Glenn Pastel
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Chaoji Chen
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Gegu Chen
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Shuaiming He
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Hao Huang
- Department of Mechanical Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Jianhua Zhang
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Sha Wang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| |
Collapse
|
12
|
Aziz J, Ahmad MF, Rahman MT, Yahya NA, Czernuszka J, Radzi Z. AFM analysis of collagen fibrils in expanded scalp tissue after anisotropic tissue expansion. Int J Biol Macromol 2018; 107:1030-1038. [DOI: 10.1016/j.ijbiomac.2017.09.066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 09/13/2017] [Accepted: 09/17/2017] [Indexed: 01/24/2023]
|
13
|
De Lorenzi M, Swan MC, Easter C, Chanoit GPA. Outcome of reconstruction of cutaneous limb defects in dogs using hygroscopic “self-inflating” tissue expanders. J Small Anim Pract 2017; 59:98-105. [DOI: 10.1111/jsap.12766] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/13/2017] [Accepted: 07/04/2017] [Indexed: 11/29/2022]
Affiliation(s)
- M. De Lorenzi
- Department of Soft Tissue Surgery; Clinica Veterinaria Vezzoni SRL; 26100 Cremona Italy
| | - M. C. Swan
- Department of Plastic and Reconstructive Surgery; Oxford University Hospitals NHS Foundation Trust, Spires Cleft Centre, John Radcliffe Hospital; Oxford OX3 9DU UK
| | - C. Easter
- Oxtex Limited; Witney Business and Innovation Centre; Witney OX29 7DX UK
| | - G. P. A. Chanoit
- Bristol Veterinary School; Faculty of Health Sciences, University of Bristol; Langford BS40 5DU UK
| |
Collapse
|
14
|
Garner J, Davidson D, Eckert GJ, Barco CT, Park H, Park K. Reshapable polymeric hydrogel for controlled soft-tissue expansion: In vitro and in vivo evaluation. J Control Release 2017; 262:201-211. [PMID: 28751248 PMCID: PMC5603415 DOI: 10.1016/j.jconrel.2017.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/10/2017] [Accepted: 07/24/2017] [Indexed: 11/20/2022]
Abstract
Tissue expansion is the process by which extra skin is generated using a device that applies pressure from underneath the skin. Over the course of weeks to months, stretching by this pressure creates a flap of extra tissue that can be used to cover a defect area or enclose a permanent implant. Conventional tissue expanders require a silicone shell inflated either by external injections of saline solution or air, or by internal osmotic pressure generated by a hydrophilic polymer. In this study, a shell-free tissue expander comprised only of a chemically cross-linked biocompatible polymeric hydrogel is developed. The cross-linked network of hydrophilic polymer provides for intrinsically controlled swelling in the absence of an external membrane. The new type of hydrogel expanders were characterized in vitro as well as in vivo using a rat-skin animal model. It was found that increasing the hydrophobic polyester content in the hydrogel reduced the swelling velocity to a rate and volume that eliminate the danger of premature swelling rupturing the sutured area. Additionally, increasing the crosslinking density resulted in enough mechanical strength of the hydrogel to allow for complete post-swelling removal, without the hydrogel cracking or crumbling. No systemic toxicity was noted with the expanders and histology showed the material to be highly biocompatible. These expanders have an advantage of tissue expansion without requiring an external silicone membrane, and thus, they can be cut or reshaped at the time of implantation for applications in small or physically constrained regions of the body.
Collapse
Affiliation(s)
- John Garner
- Akina, Inc., West Lafayette, IN, United States
| | - Darrel Davidson
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, United States
| | - George J Eckert
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Clark T Barco
- Roudebush Veterans Affairs Medical Center, Indianapolis, IN, United States
| | - Haesun Park
- Akina, Inc., West Lafayette, IN, United States
| | - Kinam Park
- Akina, Inc., West Lafayette, IN, United States; Purdue University, Department of Biomedical Engineering, West Lafayette, IN, United States; Purdue University, Department of Pharmaceutics, West Lafayette, IN, United States.
| |
Collapse
|
15
|
Jamadi M, Shokrollahi P, Houshmand B, Joupari MD, Mashhadiabbas F, Khademhosseini A, Annabi N. Poly (Ethylene Glycol)‐Based Hydrogels as Self‐Inflating Tissue Expanders with Tunable Mechanical and Swelling Properties. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201600479] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/30/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Mahsa Jamadi
- Biomaterials Innovation Research Center Division of Biomedical Engineering Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge MA 02139 USA
- Harvard‐MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA 02139 USA
- Stem Cell and Regenerative Medicine Division National Institute of Genetic Engineering and Biotechnology Tehran 14977‐16316 Iran
| | - Parvin Shokrollahi
- Department of Biomaterials Iran Polymer and Petrochemical Institute Tehran 14977‐13115 Iran
| | - Behzad Houshmand
- Stem Cell and Regenerative Medicine Division National Institute of Genetic Engineering and Biotechnology Tehran 14977‐16316 Iran
- Department of Periodontics School of Dentistry Shahid Beheshti University of Medical Sciences Tehran 19839‐69411 Iran
| | - Mortaza Daliri Joupari
- Animal Biotechnology Department National Institute of Genetic Engineering and Biotechnology Tehran 14977‐16316 Iran
| | - Fatemeh Mashhadiabbas
- Department of Oral and Maxillofacial Pathology School of dentistry Shahid Beheshti University of Medical Sciences Tehran 19839‐69411 Iran
| | - Ali Khademhosseini
- Biomaterials Innovation Research Center Division of Biomedical Engineering Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge MA 02139 USA
- Harvard‐MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA 02139 USA
- Department of Physics King Abdulaziz University Jeddah 21569 Saudi Arabia
- Department of Bioindustrial Technologies College of Animal Bioscience and Technology Konkuk University Seoul 143‐701 Republic of Korea
| | - Nasim Annabi
- Biomaterials Innovation Research Center Division of Biomedical Engineering Department of Medicine Brigham and Women's Hospital Harvard Medical School Cambridge MA 02139 USA
- Harvard‐MIT Division of Health Sciences and Technology Massachusetts Institute of Technology Cambridge MA 02139 USA
- Department of Chemical Engineering Northeastern University Boston MA 02115‐5000 USA
| |
Collapse
|
16
|
|
17
|
Joshi G, Okeyoshi K, Okajima MK, Kaneko T. Directional control of diffusion and swelling in megamolecular polysaccharide hydrogels. SOFT MATTER 2016; 12:5515-5518. [PMID: 27223843 DOI: 10.1039/c6sm00971a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Directional control of diffusion and swelling in megamolecular polysaccharide hydrogels is demonstrated by focusing on the anisotropic structures for water absorption. Due to the presence of a layered structure in the hydrogel, the directional control for diffusion parallel to the planar direction and swelling in the lateral direction are possible.
Collapse
Affiliation(s)
- G Joshi
- Research Area of Energy and Environment, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
| | | | | | | |
Collapse
|
18
|
Moinzadeh AT, Farack L, Wilde F, Shemesh H, Zaslansky P. Synchrotron-based Phase Contrast-enhanced Micro-Computed Tomography Reveals Delaminations and Material Tearing in Water-expandable Root Fillings Ex Vivo. J Endod 2016; 42:776-81. [PMID: 26994599 DOI: 10.1016/j.joen.2016.01.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 01/24/2016] [Accepted: 01/31/2016] [Indexed: 11/20/2022]
Abstract
INTRODUCTION This study evaluated the integrity of calcium silicate sealer-based fillings made with hygro-expandable cones (HEC) that are commercially known as CPoint or Smartpoint. METHODS Fourteen human canines were prepared according to a standardized, conventional endodontic treatment protocol and filled with the HEC/calcium silicate sealer. Three-dimensional imaging was performed with laboratory micro-computed tomography (μCT) at its highest resolution and was compared with synchrotron phase contrast-enhanced μCT (PCE-CT) scans of the treatment extending 1-7 mm from the apex. Conventional destructive optical microscopy validated observations by comparison with virtual slices in the tomographic data. RESULTS Conventional laboratory μCT at 10-μm resolution did not reveal the existing voids and defects within the root canal fillings. PCE-CT revealed elongated interfacial delamination localized mainly at the HEC-sealer interface forming extended through-and-through gaps along the root canal filling. CONCLUSIONS Endodontic studies that use conventional laboratory μCT may underestimate thin defects and delamination within root canal fillings made with HEC because of limited resolution and contrast of laboratory-based broad-spectrum low intensity x-ray sources. These limitations favor use of high-brilliance, monochromatic synchrotron-based PCE-CT to reveal the important micrometer details within large (millimeter sized) samples. PCE-CT revealed the existence of a range of significant structural defects in recently placed HEC fillings, confirmed by optical microscopy after physical sectioning. Substantial delamination spanning 20%-40% of the circumferential interface as well as other structural defects were identified within root canal fillings made of HEC and calcium silicate sealer.
Collapse
Affiliation(s)
- Amir T Moinzadeh
- Department of Endodontology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, The Netherlands.
| | - Lydia Farack
- Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Fabian Wilde
- Helmholtz-Zentrum Geesthacht (HZG), Geesthacht, Germany
| | - Hagay Shemesh
- Department of Endodontology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, The Netherlands
| | - Paul Zaslansky
- Julius Wolff Institute, Charité-Universitätsmedizin Berlin, Berlin, Germany
| |
Collapse
|
19
|
Manssor NAS, Radzi Z, Yahya NA, Mohamad Yusof L, Hariri F, Khairuddin NH, Abu Kasim NH, Czernuszka JT. Characteristics and Young's Modulus of Collagen Fibrils from Expanded Skin Using Anisotropic Controlled Rate Self-Inflating Tissue Expander. Skin Pharmacol Physiol 2016; 29:55-62. [PMID: 26836267 DOI: 10.1159/000431328] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 05/11/2015] [Indexed: 11/19/2022]
Abstract
Mechanical properties of expanded skin tissue are different from normal skin, which is dependent mainly on the structural and functional integrity of dermal collagen fibrils. In the present study, mechanical properties and surface topography of both expanded and nonexpanded skin collagen fibrils were evaluated. Anisotropic controlled rate self-inflating tissue expanders were placed beneath the skin of sheep's forelimbs. The tissue expanders gradually increased in height and reached equilibrium in 2 weeks. They were left in situ for another 2 weeks before explantation. Expanded and normal skin samples were surgically harvested from the sheep (n = 5). Young's modulus and surface topography of collagen fibrils were measured using an atomic force microscope. A surface topographic scan showed organized hierarchical structural levels: collagen molecules, fibrils and fibers. No significant difference was detected for the D-banding pattern: 63.5 ± 2.6 nm (normal skin) and 63.7 ± 2.7 nm (expanded skin). Fibrils from expanded tissues consisted of loosely packed collagen fibrils and the width of the fibrils was significantly narrower compared to those from normal skin: 153.9 ± 25.3 and 106.7 ± 28.5 nm, respectively. Young's modulus of the collagen fibrils in the expanded and normal skin was not statistically significant: 46.5 ± 19.4 and 35.2 ± 27.0 MPa, respectively. In conclusion, the anisotropic controlled rate self-inflating tissue expander produced a loosely packed collagen network and the fibrils exhibited similar D-banding characteristics as the control group in a sheep model. However, the fibrils from the expanded skin were significantly narrower. The stiffness of the fibrils from the expanded skin was higher but it was not statistically different.
Collapse
|
20
|
Sharif F, Ur Rehman I, Muhammad N, MacNeil S. Dental materials for cleft palate repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 61:1018-28. [PMID: 26838929 DOI: 10.1016/j.msec.2015.12.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 09/08/2015] [Accepted: 12/10/2015] [Indexed: 12/26/2022]
Abstract
Numerous bone and soft tissue grafting techniques are followed to repair cleft of lip and palate (CLP) defects. In addition to the gold standard surgical interventions involving the use of autogenous grafts, various allogenic and xenogenic graft materials are available for bone regeneration. In an attempt to discover minimally invasive and cost effective treatments for cleft repair, an exceptional growth in synthetic biomedical graft materials have occurred. This study gives an overview of the use of dental materials to repair cleft of lip and palate (CLP). The eligibility criteria for this review were case studies, clinical trials and retrospective studies on the use of various types of dental materials in surgical repair of cleft palate defects. Any data available on the surgical interventions to repair alveolar or palatal cleft, with natural or synthetic graft materials was included in this review. Those datasets with long term clinical follow-up results were referred to as particularly relevant. The results provide encouraging evidence in favor of dental and other related biomedical materials to fill the gaps in clefts of lip and palate. The review presents the various bones and soft tissue replacement strategies currently used, tested or explored for the repair of cleft defects. There was little available data on the use of synthetic materials in cleft repair which was a limitation of this study. In conclusion although clinical trials on the use of synthetic materials are currently underway the uses of autologous implants are the preferred treatment methods to date.
Collapse
Affiliation(s)
- Faiza Sharif
- Department of Materials Science & Engineering, Kroto Research Institute, University of Sheffield, Broad Lane, Sheffield, UK; Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore, Pakistan.
| | - Ihtesham Ur Rehman
- Department of Materials Science & Engineering, Kroto Research Institute, University of Sheffield, Broad Lane, Sheffield, UK
| | - Nawshad Muhammad
- Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore, Pakistan.
| | - Sheila MacNeil
- Department of Materials Science & Engineering, Kroto Research Institute, University of Sheffield, Broad Lane, Sheffield, UK
| |
Collapse
|
21
|
Asa'ad F, Rasperini G, Pagni G, Rios HF, Giannì AB. Pre-augmentation soft tissue expansion: an overview. Clin Oral Implants Res 2015; 27:505-22. [PMID: 26037472 DOI: 10.1111/clr.12617] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/25/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to explore the development of soft tissue expanders, their different types and their potential applications prior to bone augmentation and implant placement. MATERIAL AND METHODS A review of pertinent literature was performed using PubMed to comprehend the dynamics of soft tissue expanders and determine the current position of their pre-augmentation applications. RESULTS There is promising, albeit preliminary information regarding the benefits of pre-augmentation soft tissue expansion. Findings cannot be generalised due to relatively small sample size. CONCLUSIONS Further clinical trials with larger sample sizes and long-term follow-up are needed before soft tissue expanders can be confidently applied in everyday clinical practice.
Collapse
Affiliation(s)
- Farah Asa'ad
- Department of Biomedical, Surgical and Dental Sciences, Foundation IRCCS Ca' Granda Polyclinic, University of Milan, Milan, Italy
| | - Giulio Rasperini
- Department of Biomedical, Surgical and Dental Sciences, Foundation IRCCS Ca' Granda Polyclinic, University of Milan, Milan, Italy
| | - Giorgio Pagni
- Department of Biomedical, Surgical and Dental Sciences, Foundation IRCCS Ca' Granda Polyclinic, University of Milan, Milan, Italy
| | - Hector F Rios
- Department of Periodontics and Oral Medicine, Michigan Center for Oral Health Research, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Aldo B Giannì
- Department of Biomedical, Surgical and Dental Sciences, Foundation IRCCS Ca' Granda Polyclinic, University of Milan, Milan, Italy
| |
Collapse
|
22
|
Smith J, Radzi Z, Czernuszka J. The effects of hot pressing on the swelling behavior of P(MMA-co
-NVP) hydrogel discs. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Z. Radzi
- University of Malaya; 50603 Kuala Lumpur Malaysia
| | | |
Collapse
|
23
|
Lansdale N, Henderson L, Hennayake S. Novel Use of an Osmotic Self-inflating Tissue Expander for Hypospadias Revision Surgery. Urology 2015; 85:924-6. [DOI: 10.1016/j.urology.2014.12.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 11/25/2014] [Accepted: 12/29/2014] [Indexed: 10/23/2022]
|
24
|
Zhu J, Wang J, Liu Q, Liu Y, Wang L, He C, Wang H. Anisotropic tough poly(2-hydroxyethyl methacrylate) hydrogels fabricated by directional freezing redox polymerization. J Mater Chem B 2013; 1:978-986. [DOI: 10.1039/c2tb00288d] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
25
|
Effect of monomeric sequence on transport properties of d-glucose and ascorbic acid in poly(VP-co-HEMA) hydrogels with various water contents: molecular dynamics simulation approach. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1206-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|