38 results about "Normal cartilage" patented technology

The invention discloses a constructing method of a bracket-free engineering cartilaginous tissue and a product therefrom. The constructing method comprises the following steps: inducing and differentiating human umbilical mesenchymal stem cells into cartilaginous cells and then carrying out aggregation inducing culture so that the cartilaginous cells excrete stroma towards the outside of cells and form membranoid substance; continuously inducing and culturing the membranoid substance in a cell culture box and then transferring the membranoid substance into a centrifugal tube for inducing culture to form loose cartilaginous tissue agglomerate; and continuously inducing and culturing the loose cartilaginous tissue agglomerate in a rotating wall type bioreactor to obtain dense cartilaginous-like tissue. The cytology, the histology or the immunohistochemistry dyeing shows that the constructed engineering tissue has a normal cartilaginous cell type. The constructed bracket-free engineeringcartilaginous tissue does not relate to the composite problem of the cells and an exogenous bracket, is absent from the biocompatibility problem between the cells and the bracket, is safe to human body, has even cell planting density and simple clinical application operation and can be applied to the treatment or the repair of cartilage loss.

The invention discloses a tissue engineering cartilage and a preparation method thereof. The tissue engineering cartilage is cytoactive, consists of sequentially laminated cell patches including a surface layer, a middle layer, a deep layer and a calcified layer, and takes collagen matrix as a main component; the layers are compounded by collagen and hyaluronic acid, and the bordering integration of various layers of cartilage structures is promoted through hydrostatic culture; and the tissue engineering cartilage is prepared by preparing various layers of cartilage cell patches and assembling multiple structural layers. The prepared tissue engineering cartilage is in a layering arrangement of a natural cartilage, has a very good tissue structure and very good mechanical properties (frictional coefficient is 75-85 percent that of a natural cartilage tissue, and the elastic modulus is 80-90 percent that of the natural cartilage tissue.); the integration between different layers is good; experiments prove that the prepared tissue engineering cartilage can form the tidal line same as that of a normal cartilage tissue and has the same layering structure; and the prepared tissue engineering cartilage is capable of promoting regeneration and function recovery of a cartilage and obviously shortening the cycle of cartilage damage treatment and is applicable to cartilage defect restoration for a load-bearing part of a articular cartilage.