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Using Biomimetically Mineralized Collagen Membranes with Different Surface Stiffness to Guide Regeneration of Bone Defects.

08:00 EDT 24th April 2018 | BioPortfolio

Summary of "Using Biomimetically Mineralized Collagen Membranes with Different Surface Stiffness to Guide Regeneration of Bone Defects."

Since guided bone regeneration(GBR) process is pronouncedly affected by the microenvironment in the defect, the surface stiffness of collagen membranes as a constituent part of the microenvironment was investigated in this study. The objective of this study was to manufacture biomimetically mineralized collagen membranes with controllable surface stiffness based on biomimetic strategy and to investigate the influences of surface stiffness on GBR process. The characterization and biocompatibility of membranes were examined in vitro. The mechanical properties of membranes were evaluated on macro and micro levels using tensile test and atomic force microscope(AFM), respectively. The critical-size cranial defect model and ectopic osteogenesis were chosen to employ their performances in vivo. The results indicated that the biomimetically mineralized collagen membranes with controllable surface stiffness were manufacture based on the biomimetic theory. The in vitro experiments showed that the mineralized collagen membrane with satisfactory surface stiffness can better promote the adhesion, proliferation and osteogenic differentiation of mesenchymal stem cells(MSCs). The membranes can perform excellently in both osteoinduction and osteoconduction which results in effective manifestations in aspects of ectopic osteogenesis and GBR in vivo. Therefore, this biomimetically mineralized collagen membrane is a promising candidate for GBR treatment in future.

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This article was published in the following journal.

Name: Journal of tissue engineering and regenerative medicine
ISSN: 1932-7005
Pages:

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Medical and Biotech [MESH] Definitions

A fibril-associated collagen usually found crosslinked to the surface of COLLAGEN TYPE II fibrils. It is a heterotrimer containing alpha1(IX), alpha2(IX) and alpha3(IX) subunits.

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A non-fibrillar collagen found in the structure of BASEMENT MEMBRANE. Collagen type IV molecules assemble to form a sheet-like network which is involved in maintaining the structural integrity of basement membranes. The predominant form of the protein is comprised of two alpha1(IV) subunits and one alpha2(IV) subunit, however, at least six different alpha subunits can be incorporated into the heterotrimer.

A fibrillar collagen found widely distributed as a minor component in tissues that contain COLLAGEN TYPE I and COLLAGEN TYPE III. It is a heterotrimeric molecule composed of alpha1(V), alpha2(V) and alpha3(V) subunits. Several forms of collagen type V exist depending upon the composition of the subunits that form the trimer.

Artificially produced membranes, such as semipermeable membranes used in artificial kidney dialysis (RENAL DIALYSIS), monomolecular and bimolecular membranes used as models to simulate biological CELL MEMBRANES. These membranes are also used in the process of GUIDED TISSUE REGENERATION.

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