Other brands of polyglycolic acid suture include PolySyn, Surgicryl, Polysorb and Dexon, all of which are manufactured by different companies . Vicryl is a copolymer of lactide ( a cyclic diester of lactic acid ) and glycoside.
12.
The melting temperature of PLLA can be increased by 40 50 �C and its heat deflection temperature can be increased from approximately 60 �C to up to 190 �C by physically blending the polymer with PDLA ( poly-D-lactide ).
13.
Some types of polymers being tested now are poly ( ethylene glycol ) ( PEG ), N-( 2-hydroxypropyl ) methacrylamide ( HPMA ), and poly ( lactide-co-glycolide ) ( PLGA ) copolymers have been successful in medical research.
14.
This has been demonstrated by coating biodegradable cationic microparticles ( such as poly ( lactide-co-glycolide ) formulated with cetyltrimethylammonium bromide ) with DNA . Such DNA-coated microparticles can be as effective at raising CTL as recombinant viruses, especially when mixed with alum.
15.
Example of routes to polyester formation using lactic acid . a ) Condensation of lactic acid into dimeric lactide followed by ring-opening polymerization of to form poly ( lactic acid ); b ) Direct condensation of lactic acid, demonstrating the need to continuously remove water from the system in order to drive the reaction forward.
16.
A 2011 study by El-Ayoubi et al . investigated " 3D-plotting technique to produce ( biocompatible and biodegradable ) poly-L-Lactide macroporous scaffolds with two different pore sizes " via solid free-form fabrication ( SSF ) with computer-aided-design ( CAD ), to explore therapeutic articular cartilage replacement as an " alternative to conventional tissue repair ".
17.
An example of a naturally dissolving stent is the'Absorb'stent'produced by Abbott that has several design components and features : "'base scaffold "': a poly ( L-lactide ) polymer similar to that in dissolvable stitches is shaped into a tube made up of zigzag hoops linked together by bridges; drug-eluting layer': a mixture of poly-D, L-lactide ( PDLLA ) and everolimus;'markers': a pair of radio-opaque platinum markers at the ends that allow the device to be visualized during angiography;'delivery system': a balloon delivery system.
18.
An example of a naturally dissolving stent is the'Absorb'stent'produced by Abbott that has several design components and features : "'base scaffold "': a poly ( L-lactide ) polymer similar to that in dissolvable stitches is shaped into a tube made up of zigzag hoops linked together by bridges; drug-eluting layer': a mixture of poly-D, L-lactide ( PDLLA ) and everolimus;'markers': a pair of radio-opaque platinum markers at the ends that allow the device to be visualized during angiography;'delivery system': a balloon delivery system.
