scholarly journals Differently Charged P (VDF-TrFE) Membranes Influence Osteogenesis Through Differential Immunomodulatory Function of Macrophages

2022 ◽  
Vol 8 ◽  
Author(s):  
Peijun Zhu ◽  
Chunhua Lai ◽  
Mingwei Cheng ◽  
Yiheng He ◽  
Yan Xu ◽  
...  
Keyword(s):  
Surface Charge ◽  
Bone Regeneration ◽  
Cell Fate ◽  
Critical Factor ◽  
Guided Bone Regeneration ◽  
Macrophage Phenotype ◽  
Macrophage Response ◽  
Charged Surfaces ◽  
Marrow Mesenchymal Stem Cells ◽  
Anti Inflammatory

A biomaterial-mediated immune response is a critical factor to determine the cell fate as well as the tissue-regenerative outcome. Although piezoelectric-membranes have attracted considerable interest in the field of guided bone regeneration thanks to their biomimetic electroactivity, the influence of their different surface-charge polarities on the immune-osteogenic microenvironment remains obscure. The present study aimed at investigating the interaction between piezoelectric poly (vinylidene fluoridetrifluoroethylene) [P (VDF-TrFE)] membranes with different surface polarities (negative or positive) and macrophage response, as well as their subsequent influence on osteogenesis from an immunomodulating perspective. Specifically, the morphology, wettability, crystal phase, piezoelectric performance, and surface potential of the synthetic P (VDF-TrFE) samples were systematically characterized. In addition, RAW 264.7 macrophages were seeded onto differently charged P (VDF-TrFE) surfaces, and the culture supernatants were used to supplement cultures of rat bone marrow mesenchymal stem cells (rBMSCs) on the corresponding P (VDF-TrFE) surfaces. Our results revealed that oppositely charged surfaces had different abilities in modulating the macrophage-immune-osteogenic microenvironment. Negatively charged P (VDF-TrFE), characterized by the highest macrophage elongation effect, induced a switch in the phenotype of macrophages from M0 (inactivated) to M2 (anti-inflammatory), thus promoting the osteogenic differentiation of rBMSCs by releasing anti-inflammatory cytokine IL-10. Interestingly, positively charged P (VDF-TrFE) possessed pro-inflammatory properties to induce an M1 (pro-inflammatory) macrophage-dominated reaction, without compromising the subsequent osteogenesis as expected. In conclusion, these findings highlighted the distinct modulatory effect of piezoelectric-P (VDF-TrFE) membranes on the macrophage phenotype, inflammatory reaction, and consequent immune-osteogenic microenvironment depending on their surface-charge polarity. This study provides significant insight into the design of effective immunoregulatory materials for the guided bone regeneration application.

Silk-based hybrid microfibrous mats as guided bone regeneration membranes

2021 ◽  
Author(s):  
Mi Wu ◽  
Zhengyi Han ◽  
Wen Liu ◽  
Jinrong Yao ◽  
Bingjiao Zhao ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Mesenchymal Stem Cells ◽  
Cell Adhesion ◽  
Bone Regeneration ◽  
Silk Fibroin ◽  
Guided Bone Regeneration ◽  
Regenerated Silk Fibroin ◽  
Marrow Mesenchymal Stem Cells ◽  
Cell Adhesion And Proliferation

LAPONITE® (LAP) nanoplatelets were incorporated within a regenerated silk fibroin (RSF) microfibrous mat via electrospinning, which exhibited better cell adhesion and proliferation of bone marrow mesenchymal stem cells (BMSCs) than the pristine RSF ones.

scholarly journals In Vivo Analysis of the Biocompatibility and Macrophage Response of a Non-Resorbable PTFE Membrane for Guided Bone Regeneration

2018 ◽  
Vol 19 (10) ◽  
pp. 2952 ◽  
Author(s):  
Tadas Korzinskas ◽  
Ole Jung ◽  
Ralf Smeets ◽  
Sanja Stojanovic ◽  
Stevo Najman ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Guided Bone Regeneration ◽  
Foreign Body Response ◽  
Tissue Response ◽  
Collagen Membrane ◽  
Macrophage Response ◽  
Barrier Membrane ◽  
In Vivo Analysis ◽  
Inflammatory Macrophages

The use of non-resorbable polytetrafluoroethylene (PTFE) membranes is indicated for the treatment of large, non-self-containing bone defects, or multi-walled defects in the case of vertical augmentations. However, less is known about the molecular basis of the foreign body response to PTFE membranes. In the present study, the inflammatory tissue responses to a novel high-density PTFE (dPTFE) barrier membrane have preclinically been evaluated using the subcutaneous implantation model in BALB/c mice by means of histopathological and histomorphometrical analysis methods and immunohistochemical detection of M1- and M2-macrophages. A collagen membrane was used as the control material. The results of the present study demonstrate that the tissue response to the dPTFE membrane involves inflammatory macrophages, but comparable cell numbers were also detected in the implant beds of the control collagen membrane, which is known to be biocompatible. Although these data indicate that the analyzed dPTFE membrane is not fully bioinert, but its biocompatibility is comparable to collagen-based membranes. Based on its optimal biocompatibility, the novel dPTFE barrier membrane may optimally support bone healing within the context of guided bone regeneration (GBR).

Sequential controlled-released dual-drug loaded scaffold for guided bone regeneration in a rat fenestration defect model

2017 ◽  
Vol 5 (37) ◽  
pp. 7701-7710 ◽  
Author(s):  
Zhenzhao Guo ◽  
Dongying Bo ◽  
Ping He ◽  
Hong Li ◽  
Gang Wu ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Bone Regeneration ◽  
Guided Bone Regeneration ◽  
Defect Model ◽  
Inflammatory Drug ◽  
Anti Inflammatory ◽  
Osseous Regeneration ◽  
Controlled Released ◽  
Dual Drug

A 3D multifunctional scaffold, which combines the merits of osseous regeneration and local anti-inflammatory drug delivery, has been developed for GBR.

Fabrication of a silver nanoparticle-coated collagen membrane with anti-bacterial and anti-inflammatory activities for guided bone regeneration

2018 ◽  
Vol 13 (6) ◽  
pp. 065014 ◽  
Author(s):  
Peilin Chen ◽  
Zhigang Wu ◽  
Alex Leung ◽  
Xiaobo Chen ◽  
Euphemie Landao-Bassonga ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Silver Nanoparticle ◽  
Guided Bone Regeneration ◽  
Collagen Membrane ◽  
Anti Inflammatory ◽  
Coated Collagen

SauFRa technique for the fixation of resorbable membranes in horizontal guided bone regeneration - a technical report

2020 ◽  
Author(s):  
Saurabh Mohan Kamat ◽  
Rakshit Khandeparker ◽  
Francis Akkara ◽  
Vikas Dhupar ◽  
Ashwin Mysore
Keyword(s):  
Bone Regeneration ◽  
Guided Bone Regeneration ◽  
Novel Technique ◽  
Technical Report ◽  
Suturing Techniques ◽  
Graft Migration

Membrane fixation in guided bone regeneration (GBR) has been traditionally achieved using resorbable pins, titanium tacks or miniscrews. However, these techniques are marredwith a number of clinical challenges. This article presents the “SauFRa” technique, a novel technique for stabilization of resorbable membranes in both, single as well as multiple implant sites while avoiding the shortcomings of other suturing techniques described in literature. Furthermore, the technique also eliminates the possibility of complications observed when using resorbable pins, titanium tacks or miniscrews, such as damage to adjacent roots during insertion. The authors’ employed this technique in 89 patients (51 male and 35 female) and found no complications like tissue dehiscence, infection or graft migration.

REGENERAÇÃO ÓSSEA GUIADA DE ALVÉOLOS DE EXTRAÇÃO DENTÁRIO- UMA REVISÃO

2016 ◽  
Vol 1 (45) ◽  
Author(s):  
Bruno Pires Miranda
Keyword(s):  
Bone Regeneration ◽  
Tooth Extraction ◽  
Oral Surgery ◽  
Guided Bone Regeneration ◽  
The Body ◽  
Synthetic Material ◽  
Dynamic Changes ◽  
Tooth Socket ◽  
Ability To Regenerate ◽  
Implant Dentistry

Resumo O osso é um tecido conjuntivo especializado, vascularizado e dinâmico que se modifica ao longo do organismo. Quando lesado, possui uma capacidade única de regeneração e reparação sem a presença de cicatrizes, mas em algumas situações devido tamanho do defeito ósseo não se regenera por completo. Assim, se faz necessária a realização de procedimentos de regeneração óssea guiada. Para isso, o implantodontista deve conhecer as bases biológicas da regeneração óssea guiada alveolar e suas indicações. Nesta revisão foram abordadas indicações, vantagens e tipos de biomateriais utilizados para preenchimento do alvéolo dentário imediatamente após a extração dentária sempre que o objetivo for à reabilitação através da instalação de implantes. Mesmo este, biomateriais, apresentando inúmeras qualidades, estudos ainda devem ser feitos a fim de obter a cada dia, um material sintético compatível com o tecido ósseo perdido em quantidades adequadas sem necessitar de cirurgias extra-bucais.ABSTRACT Bone is a specialized vascularized connective tissue that dynamic changes throughout the body. When injured, it has a unique ability to regenerate and repair without the presence of scars, but in some situations due to size of the bone defect does not regenerate completely. Thus, it is necessary to perform guided bone regeneration procedures. For this, the implant dentistry must know the biological bases of alveolar guided bone regeneration and its indications. In this review were addressed indications, advantages and types of biomaterials used for filling the tooth socket immediately after the tooth extraction whenever the goal is rehabilitation through implants installation. Even this, biomaterials, having several qualities, further studies must be done to obtain each day, a synthetic material compatible with the bone tissue lost in proper amounts without the need of extra-oral surgery.

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