4 research outputs found
The role of different dry-mixing techniques on the mechanical and biological behavior of UHMWPE/alumina-zirconia composites for biomedical applications
No full textThe structural, morphological, mechanical characterization and cells interaction of ATZ (Alumina Toughened
Zirconia)-UHMWPE composites containing 2.5 wt% of ceramic filler obtained with different dry-mixing techniques
are discussed, in order to assess their feasibility as biomedical supportive function materials. The results
indicate that, by changing the dry-mixing techniques used for preparing composites, it is possible to tune the
structural and morphological characteristics of the composites that, in turn, affect the mechanical parameters.
All the composites show good cell interaction and promote higher cell viability at 24 h than the unfilled
polymer. The biological behavior is not directly correlated with wettability and microroughness, but it seems
dependent on the presence of ATZ filler
The role of alumina-zirconia loading on the mechanical and biological properties of UHMWPE for biomedical applications
No full textDifferent amounts of Alumina Toughened Zirconia (80–20 wt%) (ATZ) were dispersed in UHMWPE matrix with the purpose of obtaining a material easy to be processed, inexpensive, with suitable mechanical properties and good cells interaction. The UHMWPE/ATZ composites were prepared by using a homogenizer, followed by compression molding. All the composites show an increase in elastic modulus and hardness respect to neat UHMWPE. The composite with the lowest amount of ATZ (i.e. 2.5 wt%) also displays an increase of the yield stress. The biological behavior is not directly correlated neither to wettability nor to microroughness, while it seems that the distribution of ATZ filler plays an important role
