Skeletal Implants
Have: PMMA - bone cement
- not biodegradable
- in situ polymerization - high temperature ~100°C
- good match in mechanical properties
Mechanical Properties of PMMA:
Tensile Strength: 55 - 85 MPa
Elongation at Break: 2 - 7 %
Tensile Modulus: 2.4 - 3.3 GPa
Mechanical Properties of Bone:
Ultimate Tensile Stress: 120 MPa
Elongation at Break: 1.4 %