07 - Bone and Vertebroplasty

Question 1

Application of vertebroplasty

Answer 1

• osteoporosis in spine
• augmentation = percutaneous vertebroplasty PVP
  cement is usually PMMA

Question 2

What do we want to predict in vertebroplasty?

Answer 2

• strength before injection
• cement flow
• strength after cement curing
• link outcome to cement type, volume and cannula placement
  /WITH/ xpmtl studies + FEM
  => validation of a LUT to predict mechcl resp of bone-cement composites

Question 3

Quantify change of fracture risk

Answer 3

• FFR = factor of fracture risk
• OFRI = organ fracture risk improvement factor
• cement stiffness: small influence 0.2%
• cement volume: moderate influence 22%
• cannula placement: high influence 47%

Question 4

Challenges in vertebroplasty

Answer 4

• outcome & effectiveness = f(patient’s bone cdt°)
• not all strategies are suitable to accomplish mechcl stab
• OFRI < 1 is frequent…
• controversy