Advances of Textiles in Tissue Engineering Scaffolds
189
monomer constituent, ratio of the co-polymers and functionalisation of side chains
are also used for bone tissue engineering and (iv) hydrogels which constitute hydrated
polymer chains giving the advantage of cell delivery and growth factors are also used.
The biomaterials support the adhesion of cells throughout the structure and all the
essential nutrients constructing the ECM matrix [72].
The bone being a highly complex and profoundly designed structure the fabrication of the scaffold skeleton is by advanced techniques like 3D printing, electrospinning or solid free formation (SFF) techniques. Thermally induced phase separation (TIPS), microsphere sintering, solvent casting/particle leaching and scaffold coating are also studied for the manufacture of scaffolds. For a textile professional point of view, the techniques of embroidering and non-woven have gained a
momentum in the field of bone tissue engineering showing encouraging results [72].
The technique of embroidery makes the user available many variables so as to
construct a bone like structure. These variables consist of stitching length and assembly, density of the stitching as per the model design and thread size empowers the
designer to change the scaffold design giving desired porosity, surface area, and
mechanical properties. 3D structure can be created by stacking, inter-weaving one
ply on another. Strength of the designed scaffold can also be controlled through
assembly and stitch mode. Interconnecting porous structure without compromising
any of other parameters can be obtained with ease using embroidery technology [73].
Non-woven technology widely used in the manufacturing of medical scaffold
and regenerative medicine field, thus the importance of nonwoven technology for
bone tissue engineering is very significant. Nonwoven fabrics are highly porous in
nature and their low density fibrous structure makes their overall density less than
0.40 g/cm
3 . The internal porous structure of nonwoven can be altered in terms of
interconnections of pores and pore size distribution during manufacturing. The most
of the fibres in the nonwoven structures are arranged in the direction of either in
length or width, few very processes are available which can arrange the orientation
of fibres through the thickness of nonwoven such as air laid, carded webs, vertically
lapped using needle punching and hydro-entanglement techniques. The orientation of
fibres altered during manufacturing of nonwoven decides the properties of nonwoven
fabric like direction of mechanical properties and transportation of fluid. Different
types of nonwoven structures can be produced for the scaffold applications using
various manufacturing routes.
There is extensive research has been conducted throughout years in the world in
the field of applications of scaffold in bone tissue engineering. However integration
of all properties and functions in a single biomaterial system is a challenge for the
researchers.
189
monomer constituent, ratio of the co-polymers and functionalisation of side chains
are also used for bone tissue engineering and (iv) hydrogels which constitute hydrated
polymer chains giving the advantage of cell delivery and growth factors are also used.
The biomaterials support the adhesion of cells throughout the structure and all the
essential nutrients constructing the ECM matrix [72].
The bone being a highly complex and profoundly designed structure the fabrication of the scaffold skeleton is by advanced techniques like 3D printing, electrospinning or solid free formation (SFF) techniques. Thermally induced phase separation (TIPS), microsphere sintering, solvent casting/particle leaching and scaffold coating are also studied for the manufacture of scaffolds. For a textile professional point of view, the techniques of embroidering and non-woven have gained a
momentum in the field of bone tissue engineering showing encouraging results [72].
The technique of embroidery makes the user available many variables so as to
construct a bone like structure. These variables consist of stitching length and assembly, density of the stitching as per the model design and thread size empowers the
designer to change the scaffold design giving desired porosity, surface area, and
mechanical properties. 3D structure can be created by stacking, inter-weaving one
ply on another. Strength of the designed scaffold can also be controlled through
assembly and stitch mode. Interconnecting porous structure without compromising
any of other parameters can be obtained with ease using embroidery technology [73].
Non-woven technology widely used in the manufacturing of medical scaffold
and regenerative medicine field, thus the importance of nonwoven technology for
bone tissue engineering is very significant. Nonwoven fabrics are highly porous in
nature and their low density fibrous structure makes their overall density less than
0.40 g/cm
3 . The internal porous structure of nonwoven can be altered in terms of
interconnections of pores and pore size distribution during manufacturing. The most
of the fibres in the nonwoven structures are arranged in the direction of either in
length or width, few very processes are available which can arrange the orientation
of fibres through the thickness of nonwoven such as air laid, carded webs, vertically
lapped using needle punching and hydro-entanglement techniques. The orientation of
fibres altered during manufacturing of nonwoven decides the properties of nonwoven
fabric like direction of mechanical properties and transportation of fluid. Different
types of nonwoven structures can be produced for the scaffold applications using
various manufacturing routes.
There is extensive research has been conducted throughout years in the world in
the field of applications of scaffold in bone tissue engineering. However integration
of all properties and functions in a single biomaterial system is a challenge for the
researchers.