Hydroxyapatite-polyethylene composites for bone substitution: effects of ceramic particle size and morphology 

 -  BioMaterials, 19, p.2357-2366, 1998 .
<br/><br/> Synthetic hydroxyapatite particles of two median sizes and di¤erent morphologies have been used to manufacture hydroxyapatite reinforced high density polyethylene omposites (HAPEXTM)for medical applications. The e¤ects of hydroxyapatite particle size on properties of the resultant composites were investigated using various techniques. It was found that composites with smaller hydroxyapatite particles had higher torsional modulus, tensile modulus and tensile strength, but lower strain to failure. Examination of fracture surfaces revealed that only a mechanical bond existed between the Şller and the matrix. It was shown that dynamic mechanical analysis is useful in studying the viscoelastic behaviour of the composite. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HYDROXYAPATITE<br/>POLYETHYLENE<br/>STRUCTURE<br/>PROPERTY<br/>PARTICLE SIZE