Abstract
Bioactive glass-ceramic apatite-wollastonite (A-W) has been incorporated into polyethylene in particulate form to create new bioactive composites for potential maxillofacial applications. The effects of varying the volume fraction of glass-ceramic A-W filler and the glass-ceramic A-W particle size were investigated by measuring the bonding strength of the bonelike apatite layer formed on the surface of glass-ceramic A-W-polyethylene composites. The bonding strength was evaluated via a modified ASTM C-333 standard in which a tensile stress was applied to the substrate and the strength of the bioactive layer was compared with that formed on commercially available hydroxyapatite-polyethylene composite samples, HAPEX™. The composites demonstrated greater bonding strength with increased filler content and reduced filler particle size (maximum 6.9 ± 0.5 MPa) and a marginally greater bonding strength as compared with HAPEX™ (2.8 ± 0.5 MPa), when glass-ceramic A-W-polyethylene composite samples with the same filler content were tested. The higher bonding strength of the apatite layer formed on the A-W-polyethylene composite samples suggests that, in addition to maxillofacial applications, these composites might also be utilized in applications involving higher levels of load bearing.
| Original language | English |
|---|---|
| Pages (from-to) | 952-959 |
| Number of pages | 8 |
| Journal | Journal of Biomedical Materials Research - Part A |
| Volume | 67 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2003 Dec 1 |
| Externally published | Yes |
Keywords
- Bonding strength
- Composite
- Glass-ceramic apatite-wollastonite
- Polyethylene
- Volume fraction
ASJC Scopus subject areas
- Ceramics and Composites
- Biomaterials
- Biomedical Engineering
- Metals and Alloys