Abio-Fibre Swelling PMMA/HA Artificial Skull Composite Materials' Study And Application

Skull is an important part, which is bracket and protect the brain. Now used for repairment metals include bio-metal and alloys, bio-ceramics and bio-macromolecule, self-bone or variant bone etc, alone applying these materials, which exsits shortage all to nothing. Bio-macromolecule (such as ploy methyl methacylate, PMMA) although has better bio-compatibility, some physics machine function are not ideal. This text has studied abio-fiber swelling PMMA/HA artificial skull composite material. It has not only better physics machine function, but also better bio-compatibility, bone-combined character than bio-metal and alloys, bio-ceramics and bio-macromolecule etc.Making use of the water heat synthesization method, air current comminution method and classification filtration composite technique has preparated even crystal of HA, average particle size is 280nm.Making use of many layers composite technique and heat press technique to make artificial skull, through a series of performance testes (including elongate performance, compress performance, curve performance, concussion performance, lay cut performance, concussion cut performance), making use of drainage method to calculate its average density, which is 1.25kg/m3, and combustion method to calculate its content of macromolecule, which is 57.7%. It is proved better physics machine function.Detecting the content of trace MMA from composite materials with gas phase chromatography method, The result shows that its relative criteria deviation is less than 0.022, average coefficient of recovery (n=4) is from 98.0 percent to 99.1 percent. Content of trace MMA is only 0.20%. the result shows material's polymerization is very high and it takes on safety. Using adhesive degree method to measure and calculate molecular weight of PMMA, which is 69.5 104.The material's surface can become rough after special disposal, which is benefit to organization cell adhesion and bone combination. It is discovered that artificial skull is marinated in simuted body fluid: the sample surface like-boneapatite belongs to carbonic acid hydroxide apatite, which can have good combination withhuman body orginzation.