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Toledano-Osorio M, Osorio R, Bueno J, Vallecillo C, Vallecillo-Rivas M, Sanz M. Next-generation antibacterial nanopolymers for treating oral chronic inflammatory diseases of bacterial origin. Int Endod J 2024; 57:787-803. [PMID: 38340038 DOI: 10.1111/iej.14040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/15/2024] [Accepted: 01/27/2024] [Indexed: 02/12/2024]
Abstract
BACKGROUND 'Periodontitis' refers to periodontal destruction of connective tissue attachment and bone, in response to microorganisms forming subgingival biofilms on the root surface, while 'apical periodontitis' refers to periapical inflammatory processes occurring in response to microorganisms within the root canal system. The treatment of both diseases is based on the elimination of the bacterial challenge, though its predictability depends on the ability of disrupting these biofilms, what may need adjunctive antibacterial strategies, such as the next-generation antibacterial strategies (NGAS). From all the newly developed NGAS, the use of polymeric nanotechnology may pose a potential effective approach. Although some of these strategies have only been tested in vitro and in preclinical in vivo models, their use holds a great potential, and therefore, it is relevant to understand their mechanism of action and evaluate their scientific evidence of efficacy. OBJECTIVES To explore NGAS based on polymeric nanotechnology used for the potential treatment of periodontitis and apical periodontitis. METHOD A systemic search of scientific publications of adjunctive antimicrobial strategies using nanopolymers to treat periodontal and periapical diseases was conducted using The National Library of Medicine (MEDLINE by PubMed), The Cochrane Oral Health Group Trials Register, EMBASE and Web of Science. RESULTS Different polymeric nanoparticles, nanofibres and nanostructured hydrogels combined with antimicrobial substances have been identified in the periodontal literature, being the most commonly used nanopolymers of polycaprolactone, poly(lactic-co-glycolic acid) and chitosan. As antimicrobials, the most frequently used have been antibiotics, though other antimicrobial substances, such as metallic ions, peptides and naturally derived products, have also been added to the nanopolymers. CONCLUSION Polymeric nanomaterials containing antimicrobial compounds may be considered as a potential NGAS. Its relative efficacy, however, is not well understood since most of the existing evidence is derived from in vitro or preclinical in vivo studies.
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Affiliation(s)
- Manuel Toledano-Osorio
- Postgraduate Program of Specialization in Periodontology, Faculty of Dentistry, University Complutense of Madrid, Madrid, Spain
| | - Raquel Osorio
- Faculty of Dentistry, University of Granada, Granada, Spain
| | - Jaime Bueno
- Postgraduate Program of Specialization in Periodontology, Faculty of Dentistry, University Complutense of Madrid, Madrid, Spain
| | | | | | - Mariano Sanz
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, Madrid, Spain
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2
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Alqahtani AM. Guided Tissue and Bone Regeneration Membranes: A Review of Biomaterials and Techniques for Periodontal Treatments. Polymers (Basel) 2023; 15:3355. [PMID: 37631412 PMCID: PMC10457807 DOI: 10.3390/polym15163355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/05/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
This comprehensive review provides an in-depth analysis of the use of biomaterials in the processes of guided tissue and bone regeneration, and their indispensable role in dental therapeutic interventions. These interventions serve the critical function of restoring both structural integrity and functionality to the dentition that has been lost or damaged. The basis for this review is laid through the exploration of various relevant scientific databases such as Scopus, PubMed, Web of science and MEDLINE. From a meticulous selection, relevant literature was chosen. This review commences by examining the different types of membranes used in guided bone regeneration procedures and the spectrum of biomaterials employed in these operations. It then explores the manufacturing technologies for the scaffold, delving into their significant impact on tissue and bone regenerations. At the core of this review is the method of guided bone regeneration, which is a crucial technique for counteracting bone loss induced by tooth extraction or periodontal disease. The discussion advances by underscoring the latest innovations and strategies in the field of tissue regeneration. One key observation is the critical role that membranes play in guided reconstruction; they serve as a barrier, preventing the entry of non-ossifying cells, thereby promoting the successful growth and regeneration of bone and tissue. By reviewing the existing literature on biomaterials, membranes, and scaffold manufacturing technologies, this paper illustrates the vast potential for innovation and growth within the field of dental therapeutic interventions, particularly in guided tissue and bone regeneration.
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Affiliation(s)
- Ali M Alqahtani
- Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, Al Fara, Abha 62223, Saudi Arabia
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3
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Novel, Blended Polymeric Microspheres for the Controlled Release of Methotrexate: Characterization and In Vivo Antifibrotic Studies. Bioengineering (Basel) 2023; 10:bioengineering10030298. [PMID: 36978688 PMCID: PMC10045572 DOI: 10.3390/bioengineering10030298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/14/2023] [Accepted: 02/18/2023] [Indexed: 03/03/2023] Open
Abstract
Low dose methotrexate (MTX) is known to effectively decrease type I collagen production in dermal fibroblasts, while increasing the matrix metalloproteinase-1 (MMP-1) production in vitro. For in vivo use as an antifibrotic agent on wounds, a linear and extended controlled release formulation of MTX is required. The objective of this study was to optimize the fabrication of MTX-loaded polymeric microspheres with such properties, and to test the efficacy for the prevention of fibrosis in vivo. Poly lactic-co-glycolic acid (PLGA), Poly (L-lactic acid) (PLLA) and the diblock copolymer, methoxypolyethylene glycol-block-poly (D, L-lactide) (MePEG-b-PDLLA), were used to fabricate microspheres, which were then characterized in terms of size, drug encapsulation efficiency, and in vitro release profiles. The optimized formulation (PLGA with diblock copolymer) showed high drug encapsulation efficiency (>80%), low burst release (~10%) and a gradual release of MTX. The amphipathic diblock copolymer is known to render the microsphere surface more biocompatible. In vivo, these microspheres were effective in reducing fibrotic tissue which was confirmed by quantitative measurement of type I collagen and α-smooth muscle actin expression, demonstrating that MTX can be efficiently encapsulated in PLGA microspheres to provide a delayed, gradual release in wound beds to reduce fibrosis in vivo.
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Mirzaeei S, Ezzati A, Mehrandish S, Asare-Addo K, Nokhodchi A. An overview of guided tissue regeneration (GTR) systems designed and developed as drug carriers for management of periodontitis. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103341] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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5
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Toledano-Osorio M, Vallecillo C, Vallecillo-Rivas M, Manzano-Moreno FJ, Osorio R. Antibiotic-Loaded Polymeric Barrier Membranes for Guided Bone/Tissue Regeneration: A Mini-Review. Polymers (Basel) 2022; 14:polym14040840. [PMID: 35215754 PMCID: PMC8963018 DOI: 10.3390/polym14040840] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/14/2022] [Accepted: 02/17/2022] [Indexed: 02/01/2023] Open
Abstract
Polymeric membranes are frequently used for bone regeneration in oral and periodontal surgery. Polymers provide adequate mechanical properties (i.e., Young’s modulus) to support oral function and also pose some porosity with interconnectivity to permit for cell proliferation and migration. Bacterial contamination of the membrane is an event that may lead to infection at the bone site, hindering the clinical outcomes of the regeneration procedure. Therefore, polymeric membranes have been proposed as carriers for local antibiotic therapy. A literature search was performed for papers, including peer-reviewed publications. Among the different membranes, collagen is the most employed biomaterial. Collagen membranes and expanded polytetrafluoroethylene loaded with tetracyclines, and polycaprolactone with metronidazole are the combinations that have been assayed the most. Antibiotic liberation is produced in two phases. A first burst release is sometimes followed by a sustained liberation lasting from 7 to 28 days. All tested combinations of membranes and antibiotics provoke an antibacterial effect, but most of the time, they were measured against single bacteria cultures and usually non-specific pathogenic bacteria were employed, limiting the clinical relevance of the attained results. The majority of the studies on animal models state a beneficial effect of these antibiotic functionalized membranes, but human clinical assays are scarce and controversial.
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Affiliation(s)
- Manuel Toledano-Osorio
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18071 Granada, Spain; (M.T.-O.); (C.V.); (M.V.-R.); (R.O.)
| | - Cristina Vallecillo
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18071 Granada, Spain; (M.T.-O.); (C.V.); (M.V.-R.); (R.O.)
| | - Marta Vallecillo-Rivas
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18071 Granada, Spain; (M.T.-O.); (C.V.); (M.V.-R.); (R.O.)
| | - Francisco-Javier Manzano-Moreno
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18071 Granada, Spain; (M.T.-O.); (C.V.); (M.V.-R.); (R.O.)
- Biomedical Group (BIO277), Department of Stomatology, Facultad de Odontología, University of Granada, 18071 Granada, Spain
- Instituto Investigación Biosanitaria ibs.GRANADA, University of Granada, C/Doctor Azpitarte 4, Planta, 18012 Granada, Spain
- Correspondence:
| | - Raquel Osorio
- Faculty of Dentistry, Colegio Máximo de Cartuja s/n, University of Granada, 18071 Granada, Spain; (M.T.-O.); (C.V.); (M.V.-R.); (R.O.)
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Zhang Y, Hu L, Lin M, Cao S, Feng Y, Sun S. RhBMP-2-Loaded PLGA/Titanium Nanotube Delivery System Synergistically Enhances Osseointegration. ACS OMEGA 2021; 6:16364-16372. [PMID: 34235307 PMCID: PMC8246472 DOI: 10.1021/acsomega.1c00851] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 05/31/2021] [Indexed: 06/13/2023]
Abstract
Although Ti-based implants have been widely used, osseointegration failure can also be found between implants and the surrounding bone tissue, especially in aged patients or in patients with certain systemic diseases. Therefore, in this research, we establish a sustained rhBMP-2 delivery system on a titanium implant surface, an anodic oxidation TiO2 nanotube layer combined with the PLGA film, to enhance osseointegration. This designed system was characterized as follows: surface topography characterization by SEM and AFM; rhBMP-2 release; and the ability to influence MC3T3 cell adhesion, proliferation, and osteogenic differentiation in vitro. Additionally, we evaluated the ability of this system to generate new bone around implants in rabbit tibias by the histological assay and removal torque test. SEM and AFM showed that PLGA membranes were formed on the surfaces of TiO2 nanotube arrays using 1, 3, and 10% PLGA solutions. The 3% PLGA group showed a perfect sustained release of rhBMP-2, lasting for 28 days. Meanwhile, the 3% PLGA group showed improved cell proliferation and osteogenic mRNA expression levels. In the in vivo experiments, the 3% PLGA group had the ability to promote osteogenesis in experimental animals. The anodized TiO2 nanotube coated with a certain thickness of the PLGA layer was an ideal and suitable rhBMP-2 carrier. This modified surface enhances osseointegration and could be useful in clinical dental implant treatment.
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Affiliation(s)
- Yilin Zhang
- Department
of Stomatology, Shandong Provincial Hospital
Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China
- Department
of Stomatology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250021, China
| | - Lihua Hu
- Department
of Stomatology, Shandong Provincial Hospital
Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China
- Department
of Stomatology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250021, China
| | - Meng Lin
- School
of Chemistry and Chemical Engineering, Shandong
University, Jinan 250012, China
| | - Shujie Cao
- School
and Hospital of Stomatology, Cheeloo College of Medicine, Shandong
Key Laboratory of Oral Tissue Regeneration & Shandong Engineering
Laboratory for Dental Materials and Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, China
| | - Yiting Feng
- School
and Hospital of Stomatology, Cheeloo College of Medicine, Shandong
Key Laboratory of Oral Tissue Regeneration & Shandong Engineering
Laboratory for Dental Materials and Oral Tissue Regeneration, Shandong University, Jinan, Shandong 250012, China
| | - Shengjun Sun
- Department
of Prosthodontics, School and Hospital of Stomatology, Cheeloo College
of Medicine, Shandong Key Laboratory of Oral Tissue Regeneration &
Shandong Engineering Laboratory for Dental Materials and Oral Tissue
Regeneration, Shandong University, Jinan, Shandong 250012, China
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7
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Fuchs A, Youssef A, Seher A, Hartmann S, Brands RC, Müller-Richter UD, Kübler AC, Linz C. A new multilayered membrane for tissue engineering of oral hard- and soft tissue by means of melt electrospinning writing and film casting – An in vitro study. J Craniomaxillofac Surg 2019; 47:695-703. [DOI: 10.1016/j.jcms.2019.01.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/17/2019] [Accepted: 01/29/2019] [Indexed: 01/01/2023] Open
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8
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Lee PW, Pokorski JK. Poly(lactic-co-glycolic acid) devices: Production and applications for sustained protein delivery. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2018; 10:e1516. [PMID: 29536634 PMCID: PMC6136991 DOI: 10.1002/wnan.1516] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 01/30/2018] [Accepted: 02/14/2018] [Indexed: 12/12/2022]
Abstract
Injectable or implantable poly(lactic-co-glycolic acid) (PLGA) devices for the sustained delivery of proteins have been widely studied and utilized to overcome the necessity of repeated administrations for therapeutic proteins due to poor pharmacokinetic profiles of macromolecular therapies. These devices can come in the form of microparticles, implants, or patches depending on the disease state and route of administration. Furthermore, the release rate can be tuned from weeks to months by controlling the polymer composition, geometry of the device, or introducing additives during device fabrication. Slow-release devices have become a very powerful tool for modern medicine. Production of these devices has initially focused on emulsion-based methods, relying on phase separation to encapsulate proteins within polymeric microparticles. Process parameters and the effect of additives have been thoroughly researched to ensure protein stability during device manufacturing and to control the release profile. Continuous fluidic production methods have also been utilized to create protein-laden PLGA devices through spray drying and electrospray production. Thermal processing of PLGA with solid proteins is an emerging production method that allows for continuous, high-throughput manufacturing of PLGA/protein devices. Overall, polymeric materials for protein delivery remain an emerging field of research for the creation of single administration treatments for a wide variety of disease. This review describes, in detail, methods to make PLGA devices, comparing traditional emulsion-based methods to emerging methods to fabricate protein-laden devices. This article is categorized under: Biology-Inspired Nanomaterials > Protein and Virus-Based Structures Implantable Materials and Surgical Technologies > Nanomaterials and Implants Biology-Inspired Nanomaterials > Peptide-Based Structures.
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Affiliation(s)
- Parker W. Lee
- Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Jonathan K. Pokorski
- Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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9
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Jackson J, Chen A, Zhang H, Burt H, Chiao M. Design and Near-Infrared Actuation of a Gold Nanorod⁻Polymer Microelectromechanical Device for On-Demand Drug Delivery. MICROMACHINES 2018; 9:mi9010028. [PMID: 30393302 PMCID: PMC6187483 DOI: 10.3390/mi9010028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/07/2018] [Accepted: 01/11/2018] [Indexed: 12/21/2022]
Abstract
Polymeric drug delivery systems usually deliver drugs by diffusion with an initial burst of release followed by a slower prolonged release phase. An optimal system would release exact doses of drugs using an on-demand external actuation system. The purpose of this study was to design and characterize a novel drug-delivery device that utilizes near infrared (NIR 800 nm) laser-actuated drug release. The device was constructed from biocompatible polymers comprising a reservoir of drug covered by an elastic perforated diaphragm composed of a bilayer of two polymers with different thermal expansion coefficients (ethylenevinylacetate (EVA) and polydimethylsiloxane (PDMS) containing gold nanoparticles). Upon illumination with a NIR laser, the gold nanoparticles rapidly heated the bilayer resulting in bending and a drug-pumping action through the perforated bilayer, following sequential laser-actuation cycles. Devices filled with the anti-proliferative drug docetaxel were seen to release only small amounts of drug by diffusion but to release large and reproducible amounts of drug over 20 s laser-actuation periods. Because NIR 800 nm is tissue-penetrating without heating tissue, suitable geometry drug-delivery devices might be implanted in the body to be actuated by an externally applied NIR laser to allow for on-demand exact drug dosing in vivo.
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Affiliation(s)
- John Jackson
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2045 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada.
| | - Aurora Chen
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2045 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada.
- Department of Mechanical Engineering, University of British Columbia, 6250 Applied Science, Vancouver, BC V6T 1Z4, Canada.
| | - Hongbin Zhang
- Department of Mechanical Engineering, University of British Columbia, 6250 Applied Science, Vancouver, BC V6T 1Z4, Canada.
| | - Helen Burt
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2045 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada.
| | - Mu Chiao
- Department of Mechanical Engineering, University of British Columbia, 6250 Applied Science, Vancouver, BC V6T 1Z4, Canada.
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10
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Sun X, Xu C, Wu G, Ye Q, Wang C. Poly(Lactic-co-Glycolic Acid): Applications and Future Prospects for Periodontal Tissue Regeneration. Polymers (Basel) 2017; 9:E189. [PMID: 30970881 PMCID: PMC6432161 DOI: 10.3390/polym9060189] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/08/2017] [Accepted: 05/11/2017] [Indexed: 12/28/2022] Open
Abstract
Periodontal tissue regeneration is the ultimate goal of the treatment for periodontitis-affected teeth. The success of regenerative modalities relies heavily on the utilization of appropriate biomaterials with specific properties. Poly (lactic-co-glycolic acid) (PLGA), a synthetic aliphatic polyester, has been actively investigated for periodontal therapy due to its favorable mechanical properties, tunable degradation rates, and high biocompatibility. Despite the attractive characteristics, certain constraints associated with PLGA, in terms of its hydrophobicity and limited bioactivity, have led to the introduction of modification strategies that aimed to improve the biological performance of the polymer. Here, we summarize the features of the polymer and update views on progress of its applications as barrier membranes, bone grafts, and drug delivery carriers, which indicate that PLGA can be a good candidate material in the field of periodontal regenerative medicine.
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Affiliation(s)
- Xiaoyu Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China.
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HV, The Netherlands.
| | - Chun Xu
- Laboratory of Regenerative Dentistry, School of Dentistry, The University of Queensland, Brisbane 4006, Australia.
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam 1081 HV, The Netherlands.
| | - Qingsong Ye
- Laboratory of Regenerative Dentistry, School of Dentistry, The University of Queensland, Brisbane 4006, Australia.
| | - Changning Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, China.
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11
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Saarani NN, Jamuna-Thevi K, Shahab N, Hermawan H, Saidin S. Antibacterial efficacy of triple-layered poly(lactic-co-glycolic acid)/nanoapatite/lauric acid guided bone regeneration membrane on periodontal bacteria. Dent Mater J 2017; 36:260-265. [PMID: 28111388 DOI: 10.4012/dmj.2016-177] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A guided bone regeneration (GBR) membrane has been extensively used in the repair and regeneration of damaged periodontal tissues. One of the main challenges of GBR restoration is bacterial colonization on the membrane, constitutes to premature membrane degradation. Therefore, the purpose of this study was to investigate the antibacterial efficacy of triple-layered GBR membrane composed of poly(lactic-co-glycolic acid) (PLGA), nanoapatite (NAp) and lauric acid (LA) with two types of Gram-negative periodontal bacteria, Fusobacterium nucleatum and Porphyromonas gingivalis through a disc diffusion and bacterial count tests. The membranes exhibited a pattern of growth inhibition and killing effect against both bacteria. The increase in LA concentration tended to increase the bactericidal activities which indicated by higher diameter of inhibition zone and higher antibacterial percentage. It is shown that the incorporation of LA into the GBR membrane has retarded the growth and proliferation of Gram-negative periodontal bacteria for the treatment of periodontal disease.
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Affiliation(s)
- Nur Najiha Saarani
- Faculty of Biosciences & Medical Engineering, Universiti Teknologi Malaysia
| | - Kalitheerta Jamuna-Thevi
- Faculty of Biosciences & Medical Engineering, Universiti Teknologi Malaysia.,Advanced Materials Research Center
| | - Neelam Shahab
- Industrial Biotechnology Research Center, SIRIM Berhad
| | - Hendra Hermawan
- Department of Mining, Metallurgical and Materials Engineering & CHU de Québec Research Center, Laval University
| | - Syafiqah Saidin
- Faculty of Biosciences & Medical Engineering, Universiti Teknologi Malaysia
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12
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Asymmetric Collagen/chitosan Membrane Containing Minocycline-loaded Chitosan Nanoparticles for Guided Bone Regeneration. Sci Rep 2016; 6:31822. [PMID: 27546177 PMCID: PMC4992893 DOI: 10.1038/srep31822] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 07/28/2016] [Indexed: 11/23/2022] Open
Abstract
Infections caused by pathogens colonization at wound sites in the process of bone healing are considered as one of the major reasons for the failure of guided bone regeneration (GBR). The objective of this study was to prepare a novel asymmetric collagen/chitosan GBR membrane containing minocycline-loaded chitosan nanoparticles. The morphologies of the membranes and nanoparticles were observed by SEM and TEM, respectively. The characterization and biocompatibility of the membranes was evaluated. The effect of the membrane on bone regeneration was assessed using the critical-size at cranial defect model. TEM images showed the spherical morphology of the nanoparticles. The results of SEM indicated that the asymmetric membrane contained a dense collagen layer and a loose chitosan layer. An in vitro experiment showed that the membrane can inhibit bacterial growth and promote osteoblasts and fibroblasts growth. The membrane showed the ability to promote angiogenesis and enhance bone regeneration in vivo. An asymmetric collagen/chitosan GBR membrane can be fabricated by loading minocycline encapsulated chitosan nanoparticles, and shows satisfactory biocompatibility and barrier function, which enhances bone regeneration. Therefore, this antibacterial GBR membrane is a promising therapeutic approach to prevent infection and guide bone regeneration.
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13
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Wang J, Wang L, Zhou Z, Lai H, Xu P, Liao L, Wei J. Biodegradable Polymer Membranes Applied in Guided Bone/Tissue Regeneration: A Review. Polymers (Basel) 2016; 8:E115. [PMID: 30979206 PMCID: PMC6431950 DOI: 10.3390/polym8040115] [Citation(s) in RCA: 176] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 03/20/2016] [Accepted: 03/24/2016] [Indexed: 12/14/2022] Open
Abstract
Polymer membranes have been widely used in guided tissue regeneration (GTR) and guided bone regeneration (GBR). In this review, various commercially available membranes are described. Much attention is paid to the recent development of biodegradable polymers applied in GTR and GBR, and the important issues of biodegradable polymeric membranes, including their classification, latest experimental research and clinical applications, as well as their main challenges are addressed. Herein, natural polymers, synthetic polymers and their blends are all introduced. Pure polymer membranes are biodegradable and biocompatible, but they lack special properties such as antibacterial properties, osteoconductivity, and thus polymer membranes loaded with functional materials such as antibacterial agents and growth factors show many more advantages and have also been introduced in this review. Despite there still being complaints about polymer membranes, such as their low mechanical properties, uncontrollable degradation speed and some other drawbacks, these problems will undoubtedly be conquered and biodegradable polymers will have more applications in GTR and GBR.
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Affiliation(s)
- Jiaolong Wang
- Department of Prosthodontics, Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China.
- College of Chemistry, Nanchang University, Nanchang 330031, China.
| | - Lina Wang
- College of Chemistry, Nanchang University, Nanchang 330031, China.
- College of Science, Nanchang Institute of Technology, Nanchang 330029, China.
| | - Ziyu Zhou
- Department of Prosthodontics, Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China.
| | - Hanjian Lai
- College of Chemistry, Nanchang University, Nanchang 330031, China.
| | - Pan Xu
- College of Chemistry, Nanchang University, Nanchang 330031, China.
| | - Lan Liao
- Department of Prosthodontics, Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China.
| | - Junchao Wei
- College of Chemistry, Nanchang University, Nanchang 330031, China.
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Jamuna-Thevi K, Suleiman M, Sabri S. Strength Improvement of a Functionally Graded and Layered Composite Membrane for Guided Bone Regeneration in Orthopedics. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.matpr.2016.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Zhang E, Zhu C, Yang J, Sun H, Zhang X, Li S, Wang Y, Sun L, Yao F. Electrospun PDLLA/PLGA composite membranes for potential application in guided tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 58:278-85. [PMID: 26478312 DOI: 10.1016/j.msec.2015.08.032] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 07/18/2015] [Accepted: 08/22/2015] [Indexed: 01/14/2023]
Abstract
With the aim to explore a membrane system with appropriate degradation rate and excellent cell-occlusiveness for guided tissue regeneration (GTR), a series of poly(D, L-lactic acid) (PDLLA)/poly(D, L-lactic-co-glycolic acid) (PLGA) (100/0, 70/30, 50/50, 30/70, 0/100, w/w) composite membranes were fabricated via electrospinning. The fabricated membranes were evaluated by morphological characterization, water contact angle measurement and tensile test. In vitro degradation was characterized in terms of the weight loss and the morphological change. Moreover, in vitro cytologic research revealed that PDLLA/PLGA composite membranes could efficiently inhibit the infiltration of 293 T cells. Finally, subcutaneous implant test on SD rat in vivo showed that PDLLA/PLGA (70/30, 50/50) composite membranes could function well as a physical barrier to prevent cellular infiltration within 13 weeks. These results suggested that electrospun PDLLA/PLGA (50/50) composite membranes could serve as a promising barrier membrane for guided tissue regeneration due to suitable biodegradability, preferable mechanical properties and excellent cellular shielding effects.
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Affiliation(s)
- Ershuai Zhang
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Chuanshun Zhu
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Jun Yang
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin 300071, China
| | - Hong Sun
- Department of Basic Medical Sciences, North China University of Science and Technology, Tangshan 063000, China
| | - Xiaomin Zhang
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Suhua Li
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin 300071, China
| | - Yonglan Wang
- Stomatological Hospital, Tianjin Medical University, Tianjin 300070, China
| | - Lu Sun
- Stomatological Hospital, Tianjin Medical University, Tianjin 300070, China
| | - Fanglian Yao
- School of Chemical Engineering and Technology, Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Tianjin 300072, China.
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McDermott M, Chatterjee S, Hu X, Ash-Shakoor A, Avery R, Belyaeva A, Cruz C, Hughes M, Leadbetter J, Merkle C, Moot T, Parvinian S, Patwardhan D, Saylor D, Tang N, Zhang T. Application of quality by design (QbD) approach to ultrasonic atomization spray coating of drug-eluting stents. AAPS PharmSciTech 2015; 16:811-23. [PMID: 25563817 DOI: 10.1208/s12249-014-0266-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 12/08/2014] [Indexed: 11/30/2022] Open
Abstract
The drug coating process for coated drug-eluting stents (DES) has been identified as a key source of inter- and intra-batch variability in drug elution rates. Quality-by-design (QbD) principles were applied to gain an understanding of the ultrasonic spray coating process of DES. Statistically based design of experiments (DOE) were used to understand the relationship between ultrasonic atomization spray coating parameters and dependent variables such as coating mass ratio, roughness, drug solid state composite microstructure, and elution kinetics. Defect-free DES coatings composed of 70% 85:15 poly(DL-lactide-co-glycolide) and 30% everolimus were fabricated with a constant coating mass. The drug elution profile was characterized by a mathematical model describing biphasic release kinetics. Model coefficients were analyzed as a DOE response. Changes in ultrasonic coating processing conditions resulted in substantial changes in roughness and elution kinetics. Based on the outcome from the DOE study, a design space was defined in terms of the critical coating process parameters resulting in optimum coating roughness and drug elution. This QbD methodology can be useful to enhance the quality of coated DES.
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Ma S, Chen Z, Qiao F, Sun Y, Yang X, Deng X, Cen L, Cai Q, Wu M, Zhang X, Gao P. Guided bone regeneration with tripolyphosphate cross-linked asymmetric chitosan membrane. J Dent 2014; 42:1603-12. [DOI: 10.1016/j.jdent.2014.08.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Revised: 07/26/2014] [Accepted: 08/26/2014] [Indexed: 11/27/2022] Open
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Jamuna-Thevi K, Saarani NN, Abdul Kadir MR, Hermawan H. Triple-layered PLGA/nanoapatite/lauric acid graded composite membrane for periodontal guided bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:253-63. [DOI: 10.1016/j.msec.2014.07.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 05/28/2014] [Accepted: 07/07/2014] [Indexed: 12/31/2022]
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Yu X, Takayama T, Goel SA, Shi X, Zhou Y, Kent KC, Murphy WL, Guo LW. A rapamycin-releasing perivascular polymeric sheath produces highly effective inhibition of intimal hyperplasia. J Control Release 2014; 191:47-53. [PMID: 24852098 DOI: 10.1016/j.jconrel.2014.05.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/30/2014] [Accepted: 05/08/2014] [Indexed: 01/02/2023]
Abstract
Intimal hyperplasia produces restenosis (re-narrowing) of the vessel lumen following vascular intervention. Drugs that inhibit intimal hyperplasia have been developed, however there is currently no clinical method of perivascular drug-delivery to prevent restenosis following open surgical procedures. Here we report a poly(ε-caprolactone) (PCL) sheath that is highly effective in preventing intimal hyperplasia through perivascular delivery of rapamycin. We first screened a series of bioresorbable polymers, i.e., poly(lactide-co-glycolide) (PLGA), poly(lactic acid) (PLLA), PCL, and their blends, to identify desired release kinetics and sheath physical properties. Both PLGA and PLLA sheaths produced minimal (<30%) rapamycin release within 50days in PBS buffer. In contrast, PCL sheaths exhibited more rapid and near-linear release kinetics, as well as durable integrity (>90days) as evidenced in both scanning electron microscopy and subcutaneous embedding experiments. Moreover, a PCL sheath deployed around balloon-injured rat carotid arteries was associated with a minimum rate of thrombosis compared to PLGA and PLLA. Morphometric analysis and immunohistochemistry revealed that rapamycin-loaded perivascular PCL sheaths produced pronounced (85%) inhibition of intimal hyperplasia (0.15±0.05 vs 1.01±0.16), without impairment of the luminal endothelium, the vessel's anti-thrombotic layer. Our data collectively show that a rapamycin-loaded PCL delivery system produces substantial mitigation of neointima, likely due to its favorable physical properties leading to a stable yet flexible perivascular sheath and steady and prolonged release kinetics. Thus, a PCL sheath may provide useful scaffolding for devising effective perivascular drug delivery particularly suited for preventing restenosis following open vascular surgery.
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Affiliation(s)
- Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin, 5009 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI, 53705, USA
| | - Toshio Takayama
- Department of Surgery, University of Wisconsin, 5151 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI 53705, USA
| | - Shakti A Goel
- Department of Surgery, University of Wisconsin, 5151 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI 53705, USA
| | - Xudong Shi
- Department of Surgery, University of Wisconsin, 5151 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI 53705, USA
| | - Yifan Zhou
- Department of Surgery, University of Wisconsin, 5151 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI 53705, USA
| | - K Craig Kent
- Department of Surgery, University of Wisconsin, 5151 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI 53705, USA; Department of Surgery, University of Wisconsin Hospital and Clinics, 600 Highland Avenue, Madison, WI 53792, USA
| | - William L Murphy
- Department of Biomedical Engineering, University of Wisconsin, 5009 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI, 53705, USA.
| | - Lian-Wang Guo
- Department of Surgery, University of Wisconsin, 5151 Wisconsin Institute of Medical Research, 1111 Highland Ave, Madison, WI 53705, USA.
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Zhou Y, Wu C, Xiao Y. Silicate-based bioceramics for periodontal regeneration. J Mater Chem B 2014; 2:3907-3910. [PMID: 32261640 DOI: 10.1039/c4tb00377b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Periodontal disease is characterized by the destruction of the tissues that attach the tooth to the alveolar bone. Various methods for regenerative periodontal therapy including the use of barrier membranes, bone replacement grafts, and growth factor delivery have been investigated; however, true regeneration of periodontal tissue is still a significant challenge to scientists and clinicians. The focus on periodontal tissue engineering has shifted from attempting to recreate tissue replacements/constructs to the development of biomaterials that incorporate and release regulatory signals to achieve in situ periodontal regeneration. The release of ions and molecular cues from biomaterials may help to unlock latent regenerative potential in the body by regulating cell proliferation and differentiation towards different lineages (e.g. osteoblasts and cementoblasts). Silicate-based bioactive materials, including bioactive silicate glasses and ceramics, have become the materials of choice for periodontal regeneration, due to their favourable osteoconductivity and bioactivity. This article will focus on the most recent advances in the in vitro and in vivo biological application of silicate-based ceramics, specifically as it relates to periodontal tissue engineering.
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Affiliation(s)
- Yinghong Zhou
- Institute of Health & Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland 4059, Australia.
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Shue L, Yufeng Z, Mony U. Biomaterials for periodontal regeneration: a review of ceramics and polymers. BIOMATTER 2014; 2:271-7. [PMID: 23507891 PMCID: PMC3568111 DOI: 10.4161/biom.22948] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Periodontal disease is characterized by the destruction of periodontal tissues. Various methods of regenerative periodontal therapy, including the use of barrier membranes, bone replacement grafts, growth factors and the combination of these procedures have been investigated. The development of biomaterials for tissue engineering has considerably improved the available treatment options above. They fall into two broad classes: ceramics and polymers. The available ceramic-based materials include calcium phosphate (eg, tricalcium phosphate and hydroxyapatite), calcium sulfate and bioactive glass. The bioactive glass bonds to the bone with the formation of a layer of carbonated hydroxyapatite in situ. The natural polymers include modified polysaccharides (eg, chitosan,) and polypeptides (collagen and gelatin). Synthetic polymers [eg, poly(glycolic acid), poly(L-lactic acid)] provide a platform for exhibiting the biomechanical properties of scaffolds in tissue engineering. The materials usually work as osteogenic, osteoconductive and osteoinductive scaffolds. Polymers are more widely used as a barrier material in guided tissue regeneration (GTR). They are shown to exclude epithelial downgrowth and allow periodontal ligament and alveolar bone cells to repopulate the defect. An attempt to overcome the problems related to a collapse of the barrier membrane in GTR or epithelial downgrowth is the use of a combination of barrier membranes and grafting materials. This article reviews various biomaterials including scaffolds and membranes used for periodontal treatment and their impacts on the experimental or clinical management of periodontal defect.
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Affiliation(s)
- Li Shue
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, PR China
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Olalde B, Garmendia N, Sáez-Martínez V, Argarate N, Nooeaid P, Morin F, Boccaccini A. Multifunctional bioactive glass scaffolds coated with layers of poly(d,l-lactide-co-glycolide) and poly(n-isopropylacrylamide-co-acrylic acid) microgels loaded with vancomycin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3760-7. [DOI: 10.1016/j.msec.2013.05.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 01/28/2013] [Accepted: 05/02/2013] [Indexed: 11/15/2022]
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Wang DK, Varanasi S, Fredericks PM, Hill DJ, Symons AL, Whittaker AK, Rasoul F. FT-IR characterization and hydrolysis of PLA-PEG-PLA based copolyester hydrogels with short PLA segments and a cytocompatibility study. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26930] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- David K. Wang
- Australian Institute for Bioengineering and Nanotechnology; The University of Queensland; Brisbane Queensland 4072 Australia
- Centre for Advanced Imaging; The University of Queensland; Brisbane Queensland 4072 Australia
| | - Srinivas Varanasi
- School of Dentistry; The University of Queensland; Brisbane Queensland 4000 Australia
| | - Peter M. Fredericks
- School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty; Queensland University of Technology; 2 George Street Brisbane Queensland 4001 Australia
| | - David J.T. Hill
- School of Chemistry and Molecular Biosciences; The University of Queensland; Brisbane Queensland 4072 Australia
| | - Anne L. Symons
- School of Dentistry; The University of Queensland; Brisbane Queensland 4000 Australia
| | - Andrew K. Whittaker
- Australian Institute for Bioengineering and Nanotechnology; The University of Queensland; Brisbane Queensland 4072 Australia
- Centre for Advanced Imaging; The University of Queensland; Brisbane Queensland 4072 Australia
| | - Firas Rasoul
- Australian Institute for Bioengineering and Nanotechnology; The University of Queensland; Brisbane Queensland 4072 Australia
- Centre for Advanced Imaging; The University of Queensland; Brisbane Queensland 4072 Australia
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Reis ECC, Borges APB, del Carlo RJ, Oliveira PM, Sepúlveda RV, Fernandes NA, Martins LMA, Carvalho TB. Guided tissue regeneration using rigid absorbable membranes in the dog model of chronic furcation defect. Acta Odontol Scand 2013; 71:372-80. [PMID: 22587413 DOI: 10.3109/00016357.2012.680909] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE Absorbable membranes are used to promote the regeneration of periodontal defects by Guided Tissue Regeneration (GTR). However, their collapse into the defect is commonly reported, impairing regeneration. Therefore, absorbable but rigid membranes aiming at preventing such collapse were developed and analyzed in periodontal regeneration. MATERIALS AND METHODS Membranes were analyzed in class II furcation defects in dogs; procedures included periodontal disease induction, prophylaxis and GTR (treated groups) or open flap debridement alone (control group). For GTR, the membranes were made of either 25% hydroxyapatite (HA) in polyhydroxybutyrate matrix (PHB) or 35% HA in PHB. Animals were clinically evaluated for gingival recession, clinical attachment level (CAL) and biopsies were collected at 60 and 120 days. Bone volume, trabeculae number, trabecular thickness and trabecular separation were quantified by micro-computed tomography, followed by histology. RESULTS Membrane exposure was observed in both treated groups (25 and 35% HAP) from the 8(th) day after surgery, continuously progressing until 120 days. Mean CAL for all groups remained above normal values for dogs. Bone volumetric values were not significantly different. Partial formation of bone, cementum and periodontal ligament was observed in treated groups. An inflammatory infiltrate was observed in the dense connective tissue that partially filled the center of the treated defects with active osteoclasts on bone surface. CONCLUSION Although partial regeneration of the defect was observed, it was limited by wound contamination. Consequently, rigid absorbable membranes made of HA and PHB failed to improve the regeneration of class II furcation defects in dogs.
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Gilchrist SE, Lange D, Letchford K, Bach H, Fazli L, Burt HM. Fusidic acid and rifampicin co-loaded PLGA nanofibers for the prevention of orthopedic implant associated infections. J Control Release 2013; 170:64-73. [PMID: 23639451 DOI: 10.1016/j.jconrel.2013.04.012] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 04/16/2013] [Accepted: 04/22/2013] [Indexed: 02/08/2023]
Abstract
Implant-associated infections following invasive orthopedic surgery are a major clinical problem, and are one of the primary causes of joint failure following total joint arthroplasty. Current strategies using perioperative antibiotics have been met with little clinical success and have resulted in various systemic toxicities and the promotion of antibiotic resistant microorganisms. Here we report the development of a biodegradable localized delivery system using poly(D,L-lactic acid-co-glycolic acid) (PLGA) for the combinatorial release of fusidic acid (FA) (or its sodium salt; SF) and rifampicin (RIF) using electrospinning. The drug-loaded formulations showed good antibiotic encapsulation (~75%-100%), and a biphasic drug release profile. All dual-loaded formulations showed direct antimicrobial activity in vitro against Staphylococcus epidermidis, and two strains of methicillin-resistant Staphylococcus aureus (MRSA). Furthermore, lead formulations containing 10% (w/w) FA/SF and 5% (w/w) RIF were able to prevent the adherence of MRSA to a titanium implant in an in vivo rodent model of subcutaneous implant-associated infection.
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Affiliation(s)
- Samuel E Gilchrist
- Faculty of Pharmaceutical Science, The University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
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Thomas NG, Sanil GP, Gopimohan R, Prabhakaran JV, Thomas G, Panda AK. Biocompatibility and cytotoxic evaluation of drug-loaded biodegradable guided tissue regeneration membranes. J Indian Soc Periodontol 2013; 16:498-503. [PMID: 23492817 PMCID: PMC3590715 DOI: 10.4103/0972-124x.106883] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 09/01/2012] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND In periodontology, Guided Tissue Regeneration (GTR) is based on the concept of providing a space for entry of cells with regenerative potential into the wound environment to initiate the regeneration of structures lost due to periodontal disease. First generation GTR membranes were primarily non-absorbable membranes like expanded polytetrafluorethylene which required a second surgery for its removal. This led researchers to explore absorbable materials like collagen and synthetic biodegradable polymers to fabricate GTR membranes. In the present study, biodegradable Polylactic acid (PLA) is used to fabricate membranes with the potential to be used for GTR therapy. MATERIALS AND METHODS Biocompatibility of the PLA membranes were evaluated in a subcutaneous guinea pig model. Antimicrobial effect of the drug-loaded PLA membranes were assessed against a drug-resistant Staphylococcus aureus bacterial isolate. The cytocompatibility of the drug-loaded membranes were evaluated using HeLa cell lines. RESULTS The PLA membranes were shown to be biocompatible. The drug-loaded PLA membranes showed significant activity against the bacterial isolate. Among the drug-loaded membranes, tetracycline-loaded membrane showed minimal cellular toxicity. CONCLUSION The results of this study indicate that biodegradable drug-releasing polylactide membranes have the potential to be used for periodontal regeneration. It has the necessary characteristics of a GTR membrane like biocompatibility, space maintaining ability, and tissue integration. Among the various antimicrobial agents loaded in the PLA membranes, tetracycline-loaded membranes exhibited minimal cellular toxicity against HeLa cells; at the same time showing significant activity against a pathogenic bacterium.
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Affiliation(s)
- Nebu G Thomas
- Department of Periodontics, Pushpagiri College of Dental Sciences, Pushpagiri Institute of Medical Sciences, India
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Chen X, Li Y, Aparicio C. Biofunctional Coatings for Dental Implants. THIN FILMS AND COATINGS IN BIOLOGY 2013. [DOI: 10.1007/978-94-007-2592-8_4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Carlo Reis EC, Borges APB, Araújo MVF, Mendes VC, Guan L, Davies JE. Periodontal regeneration using a bilayered PLGA/calcium phosphate construct. Biomaterials 2011; 32:9244-53. [PMID: 21885122 DOI: 10.1016/j.biomaterials.2011.08.040] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 08/14/2011] [Indexed: 10/17/2022]
Abstract
The regeneration of tissues affected by periodontal disease is a complex process; it encompasses the formation of bone, cementum and periodontal ligament. We developed a semi-rigid PLGA (polylactide-co-glycolide acid)/CaP (calcium phosphate) bilayered biomaterial construct to promote periodontal regeneration, which has a continuous outer barrier membrane and an inner topographically complex component. Our experimental model compared periodontal prophylaxis alone with prophylaxis and biomaterial implantation in the treatment of class II furcation defects in dogs. Clinical evaluation, micro-computed tomography, histology and backscattered electron imaging were used for data analysis. Healing occurred uneventfully and bone volumetric values, trabecular number and trabecular thickness were all significantly greater in the treated group; while trabecular separation was significantly greater in the control group. New cementum, bone, and periodontal ligament with Sharpey fibre insertions were only seen in the treated group. Although periodontal regeneration has been reported elsewhere, the advantages of employing our bilayered PLGA + CaP construct are twofold: 1)it did not collapse into the defect; and, 2) its inner side was able to retain the blood clot throughout the buccal defect. The result was greater periodontal regeneration than has previously been reported with traditional flexible membranes.
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Affiliation(s)
- Emily C Carlo Reis
- Departamento de Veterinária, Universidade Federal de Viçosa, Campus Universitário s/n, Viçosa, Minas Gerais, CEP 36570-000, Brazil
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Chakraborti M, Jackson JK, Plackett D, Brunette DM, Burt HM. Drug intercalation in layered double hydroxide clay: application in the development of a nanocomposite film for guided tissue regeneration. Int J Pharm 2011; 416:305-13. [PMID: 21708236 DOI: 10.1016/j.ijpharm.2011.06.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 06/09/2011] [Accepted: 06/12/2011] [Indexed: 10/18/2022]
Abstract
It has been proposed that localized and controlled delivery of alendronate and tetracycline to periodontal pocket fluids via guided tissue regeneration (GTR) membranes may be a valuable adjunctive treatment for advanced periodontitis. The objectives of this work were to develop a co-loaded, controlled release tetracycline and alendronate nanocomposite plasticized poly(lactic-co-glycolic acid) (PLGA) film that would form a suitable matrix supporting osteoblast proliferation and differentiation. Alendronate release was successfully controlled, with complete suppression of the burst phase of release by intercalation of alendronate anions in magnesium/aluminum layered double hydroxide (LDH) clay nanoparticles and dispersed in the PLGA film matrix. Tetracycline, loaded as free drug into the film together with alendronate-LDH clay complex released more rapidly than alendronate, but showed evidence of intercalation in the LDH clay particles. The dual drug loaded nanocomposite films were biocompatible with osteoblasts and after 5 week incubations, significant increase in alkaline phosphatase activity and bone nodule formation were observed.
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