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Farina M, Alexander JF, Thekkedath U, Ferrari M, Grattoni A. Cell encapsulation: Overcoming barriers in cell transplantation in diabetes and beyond. Adv Drug Deliv Rev 2019; 139:92-115. [PMID: 29719210 DOI: 10.1016/j.addr.2018.04.018] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/19/2018] [Accepted: 04/25/2018] [Indexed: 02/07/2023]
Abstract
Cell-based therapy is emerging as a promising strategy for treating a wide range of human diseases, such as diabetes, blood disorders, acute liver failure, spinal cord injury, and several types of cancer. Pancreatic islets, blood cells, hepatocytes, and stem cells are among the many cell types currently used for this strategy. The encapsulation of these "therapeutic" cells is under intense investigation to not only prevent immune rejection but also provide a controlled and supportive environment so they can function effectively. Some of the advanced encapsulation systems provide active agents to the cells and enable a complete retrieval of the graft in the case of an adverse body reaction. Here, we review various encapsulation strategies developed in academic and industrial settings, including the state-of-the-art technologies in advanced preclinical phases as well as those undergoing clinical trials, and assess their advantages and challenges. We also emphasize the importance of stimulus-responsive encapsulated cell systems that provide a "smart and live" therapeutic delivery to overcome barriers in cell transplantation as well as their use in patients.
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Baratéla FJC, Higa OZ, dos Passos ED, de Queiroz AAA. Fabrication of electrospun HPGL scaffolds via glycidyl methacrylate cross-linker: Morphology, mechanical and biological properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 73:72-79. [DOI: 10.1016/j.msec.2016.12.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 08/30/2016] [Accepted: 12/07/2016] [Indexed: 01/17/2023]
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[Oral mucosa analog allografts in non-consanguineous rats]. BIOMEDICA 2017; 37:111-118. [PMID: 28527255 DOI: 10.7705/biomedica.v37i2.3006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 06/13/2016] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Although there are therapeutic options for the treatment of oral mucosa defects, the need for functional, anatomical and aesthetically similar substitutes persists, as well as for solutions to reduce autologous grafts morbidity. OBJECTIVE To determine clinical and histological compatibility of equivalent oral mucosa allografts generated through tissue engineering in non-consanguineous rats. MATERIALS AND METHODS We used a sample of oral mucosa from Sprague Dawley rats to obtain a fibroblast culture and a keratinocytes and fibroblasts co-culture. In both cases, we used a commercial collagen membrane as "scaffold". After ten weeks of culture, we grafted the resulting membranes into four Wistar rats. The first phase of the study was the development of the oral mucosa equivalents generated by tissue engineering. Then, we implanted them in immunocompetent Wistar rats, and finallywe evaluated the clinical and histological features of the allografts. RESULTS In vivo evaluation of mucosal substitutes showed a correct integration of artificial oral mucosa in immunocompetent hosts, with an increase in periodontal biotype and the creation of a zone with increased keratinization. Histologically, the tissue was similar to the control oral mucosa sample with no inflammatory reaction nor clinical or histological rejection signs. CONCLUSION The equivalent oral mucosa allografts generated by tissue engineering showed clinical and histological compatibility.
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Oral crest lengthening for increasing removable denture retention by means of CO2 laser. ScientificWorldJournal 2014; 2014:738643. [PMID: 25383385 PMCID: PMC4212588 DOI: 10.1155/2014/738643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 08/18/2014] [Accepted: 08/19/2014] [Indexed: 11/17/2022] Open
Abstract
The loss of teeth and their replacement by artificial denture is associated with many problems. The denture needs a certain amount of ridge height to give it retention and a long-term function. Crest lengthening procedures are performed to provide a better anatomic environment and to create proper supporting structures for more stability and retention of the denture. The purpose of our study is to describe and evaluate the effectiveness of CO2 laser-assisted surgery in patients treated for crest lengthening (vestibular deepening). There have been various surgical techniques described in order to restore alveolar ridge height by pushing muscles attaching of the jaws. Most of these techniques cause postoperative complications such as edemas, hemorrhage, pain, infection, slow healing, and rebound to initial position. Our clinical study describes the treatment planning and clinical steps for the crest lengthening with the use of CO2 laser beam (6–15 Watts in noncontact, energy density range: 84.92–212.31 J/cm2, focus, and continuous mode with a focal point diameter of 0.3 mm). At the end of each surgery, dentures were temporarily relined with a soft material. Patients were asked to mandatorily wear their relined denture for a minimum of 4–6 weeks and to remove it for hygienic purposes. At the end of each surgery, the deepest length of the vestibule was measured by the operator. No sutures were made and bloodless wounds healed in second intention without grafts. Results pointed out the efficiency of the procedure using CO2 laser. At 8 weeks of post-op, the mean of crest lengthening was stable without rebound. Only a loss of 15% was noticed. To conclude, the use of CO2 laser is an effective option for crest lengthening.
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Sieira Gil R, Pagés CM, Díez EG, Llames S, Fuertes AF, Vilagran JL. Tissue-engineered oral mucosa grafts for intraoral lining reconstruction of the maxilla and mandible with a fibula flap. J Oral Maxillofac Surg 2014; 73:195.e1-16. [PMID: 25511969 DOI: 10.1016/j.joms.2014.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 08/29/2014] [Accepted: 09/02/2014] [Indexed: 11/16/2022]
Abstract
PURPOSE Many types of soft tissue grafts have been used for grafting or prelaminating bone flaps for intraoral lining reconstruction. The best results are achieved when prelaminating free flaps with mucosal grafts. We suggest a new approach to obtain keratinized mucosa over a fibula flap using full-thickness, engineered, autologous oral mucosa. PATIENTS AND METHODS We report on a pilot study for grafting fibula flaps for mandibular and maxilla reconstruction with full-thickness tissue-engineered autologous oral mucosa. We describe 2 different techniques: prelaminating the fibula flap and second-stage grafting of the fibula after mandibular reconstruction. Preparation of the full-thickness tissue-engineered oral mucosa is also described. RESULTS The clinical outcome of the tissue-engineered intraoral lining reconstruction and response after implant placement are reported. A peri-implant granulation tissue response was not observed when prelaminating the fibula, and little response was observed when intraoral grafting was performed. CONCLUSION Tissue engineering represents an alternative method by which to obtain sufficient autologous tissue for reconstructing mucosal oral defects. The full-thickness engineered autologous oral mucosa offers definite advantages in terms of reconstruction planning, donor site morbidity, and quality of the intraoral soft tissue reconstruction, thereby restoring native tissue and avoiding peri-implant tissue complications.
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Affiliation(s)
- Ramón Sieira Gil
- Staff Surgeon, Oral and Maxillofacial Surgery Unit, Department of Plastic and Maxillofacial Surgery, University Hospital Clínic, Barcelona University, Barcelona, Spain.
| | - Carles Martí Pagés
- Staff Surgeon, Oral and Maxillofacial Surgery Unit, Department of Plastic and Maxillofacial Surgery, University Hospital Clínic, Barcelona University, Barcelona, Spain
| | - Eloy García Díez
- Staff surgeon, Oral and Maxillofacial Surgery Unit, Department of Pediatric Surgery, University Hospital Sant Joan de Déu, Barcelona University, Esplugues de Llobregat, Barcelona, Spain
| | - Sara Llames
- Attending physician, El Centro de Investigación Biomédica en Red de Enfermedades Raras U714, Unidad de Cultivos Celulares e Ingeniería Tisular, Centro Comunitario de Sangre y Tejidos del Principado de Asturias, Oviedo, Spain
| | - Ada Ferrer Fuertes
- Staff Surgeon, Oral and Maxillofacial Surgery Unit, Department of Plastic and Maxillofacial Surgery, University Hospital Clínic, Barcelona University, Barcelona, Spain
| | - Jesús Lopez Vilagran
- Attending dentist, Clinica Vilagran, Private Dental Practice, Badalona, Barcelona, Spain
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Llames S, Recuero I, Romance A, García E, Peña I, Del Valle AF, Meana A, Larcher F, Del Río M. Tissue-engineered oral mucosa for mucosal reconstruction in a pediatric patient with hemifacial microsomia and ankyloglossia. Cleft Palate Craniofac J 2013; 51:246-51. [PMID: 23879858 DOI: 10.1597/12-245] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Many types of soft tissue grafts have been used for the reconstruction of oral mucosal defects. The best results are achieved with mucosal grafts; however, when large areas must be grafted, sufficient donor tissue is not available. Tissue engineering represents an alternative method to obtain sufficient autologous tissue for reconstructing oral wounds. Herein we present a pediatric patient with hemifacial microsomia and congenital ankyloglossia requiring multiple surgical interventions, and in which an autologous full-thickness tissue-engineered oral mucosa was used for successful oral reconstruction. Our study demonstrates that even under challenging conditions, robust tissue-engineered products, such as the fibrin-based oral mucosa described here, can achieve successful tissue regeneration.
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Kamel RA, Ong JF, Eriksson E, Junker JPE, Caterson EJ. Tissue engineering of skin. J Am Coll Surg 2013; 217:533-55. [PMID: 23816384 DOI: 10.1016/j.jamcollsurg.2013.03.027] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 03/15/2013] [Accepted: 03/18/2013] [Indexed: 11/18/2022]
Affiliation(s)
- Rami A Kamel
- Division of Plastic Surgery, Brigham and Women's Surgery, Harvard Medical School, Boston, MA 02115, USA
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Use of amnion as a graft material in vestibuloplasty: a clinical study. Br J Oral Maxillofac Surg 2012; 50:545-9. [DOI: 10.1016/j.bjoms.2011.09.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Accepted: 09/30/2011] [Indexed: 01/19/2023]
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Fontanilla MR, Espinosa LG. In VitroandIn VivoAssessment of Oral Autologous Artificial Connective Tissue Characteristics That Influence Its Performance as a Graft. Tissue Eng Part A 2012; 18:1857-66. [DOI: 10.1089/ten.tea.2011.0421] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Marta Raquel Fontanilla
- Tissue Engineering Group, Department of Pharmacy, Faculty of Sciences, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Lady Giovanna Espinosa
- Tissue Engineering Group, Department of Pharmacy, Faculty of Sciences, Universidad Nacional de Colombia, Bogotá, Colombia
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Hashemi H, Parhiz A, Ghafari S. Vestibuloplasty: allograft versus mucosal graft. Int J Oral Maxillofac Surg 2012; 41:527-30. [DOI: 10.1016/j.ijom.2011.09.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 07/09/2011] [Accepted: 09/22/2011] [Indexed: 11/30/2022]
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Espinosa L, Sosnik A, Fontanilla MR. Development and Preclinical Evaluation of Acellular Collagen Scaffolding and Autologous Artificial Connective Tissue in the Regeneration of Oral Mucosa Wounds. Tissue Eng Part A 2010; 16:1667-79. [DOI: 10.1089/ten.tea.2008.0571] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Lady Espinosa
- Pharmacy Department, Faculty of Sciences, National University of Colombia, Bogotá D.C., Colombia
- Graduate Program in Biotechnology, Faculty of Sciences, National University of Colombia, Bogotá D.C., Colombia
| | - Alejandro Sosnik
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry and National Science Research Council (CONICET), University of Buenos Aires, Buenos Aires, Argentina
| | - Marta R. Fontanilla
- Pharmacy Department, Faculty of Sciences, National University of Colombia, Bogotá D.C., Colombia
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Scheller EL, Krebsbach PH, Kohn DH. Tissue engineering: state of the art in oral rehabilitation. J Oral Rehabil 2009; 36:368-89. [PMID: 19228277 DOI: 10.1111/j.1365-2842.2009.01939.x] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
More than 85% of the global population requires repair or replacement of a craniofacial structure. These defects range from simple tooth decay to radical oncologic craniofacial resection. Regeneration of oral and craniofacial tissues presents a formidable challenge that requires synthesis of basic science, clinical science and engineering technology. Identification of appropriate scaffolds, cell sources and spatial and temporal signals (the tissue engineering triad) is necessary to optimize development of a single tissue, hybrid organ or interface. Furthermore, combining the understanding of the interactions between molecules of the extracellular matrix and attached cells with an understanding of the gene expression needed to induce differentiation and tissue growth will provide the design basis for translating basic science into rationally developed components of this tissue engineering triad. Dental tissue engineers are interested in regeneration of teeth, oral mucosa, salivary glands, bone and periodontium. Many of these oral structures are hybrid tissues. For example, engineering the periodontium requires growth of alveolar bone, cementum and the periodontal ligament. Recapitulation of biological development of hybrid tissues and interfaces presents a challenge that exceeds that of engineering just a single tissue. Advances made in dental interface engineering will allow these tissues to serve as model systems for engineering other tissues or organs of the body. This review will begin by covering basic tissue engineering principles and strategic design of functional biomaterials. We will then explore the impact of biomaterials design on the status of craniofacial tissue engineering and current challenges and opportunities in dental tissue engineering.
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Affiliation(s)
- E L Scheller
- Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA
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Cillo JE, Finn R. Reconstruction of the Shallow Vestibule Edentulous Mandible With Simultaneous Split Thickness Skin Graft Vestibuloplasty and Mandibular Endosseous Implants for Implant-Supported Overdentures. J Oral Maxillofac Surg 2009; 67:381-6. [DOI: 10.1016/j.joms.2008.06.065] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Revised: 02/21/2008] [Accepted: 06/17/2008] [Indexed: 10/21/2022]
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Affiliation(s)
- Jaimie T Shores
- Department of Plastic Surgery, Loma Linda University School of Medicine, Loma Linda University Medical Center, Loma Linda, CA, USA
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Murray PE, Garcia-Godoy F, Hargreaves KM. Regenerative endodontics: a review of current status and a call for action. J Endod 2007; 33:377-90. [PMID: 17368324 DOI: 10.1016/j.joen.2006.09.013] [Citation(s) in RCA: 495] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2006] [Revised: 09/10/2006] [Accepted: 09/18/2006] [Indexed: 12/16/2022]
Abstract
Millions of teeth are saved each year by root canal therapy. Although current treatment modalities offer high levels of success for many conditions, an ideal form of therapy might consist of regenerative approaches in which diseased or necrotic pulp tissues are removed and replaced with healthy pulp tissue to revitalize teeth. Researchers are working toward this objective. Regenerative endodontics is the creation and delivery of tissues to replace diseased, missing, and traumatized pulp. This review provides an overview of regenerative endodontics and its goals, and describes possible techniques that will allow regenerative endodontics to become a reality. These potential approaches include root-canal revascularization, postnatal (adult) stem cell therapy, pulp implant, scaffold implant, three-dimensional cell printing, injectable scaffolds, and gene therapy. These regenerative endodontic techniques will possibly involve some combination of disinfection or debridement of infected root canal systems with apical enlargement to permit revascularization and use of adult stem cells, scaffolds, and growth factors. Although the challenges of introducing endodontic tissue engineering therapies are substantial, the potential benefits to patients and the profession are equally ground breaking. Patient demand is staggering both in scope and cost, because tissue engineering therapy offers the possibility of restoring natural function instead of surgical placement of an artificial prosthesis. By providing an overview of the methodological issues required to develop potential regenerative endodontic therapies, we hope to present a call for action to develop these therapies for clinical use.
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Affiliation(s)
- Peter E Murray
- Department of Endodontics, College of Dental Medicine, Nova Southeastern University, Fort Lauderdale, FL 33328, USA.
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Bibliography. Current world literature. Head and neck reconstruction. Curr Opin Otolaryngol Head Neck Surg 2006; 14:289-91. [PMID: 16832188 DOI: 10.1097/01.moo.0000233602.37541.31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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