Table 1.
Tested bone cements composition and some chemical-physical characteristics.
| Cements | ||
|---|---|---|
| Non porous cement or NP cement (Mendec ® Spine) |
Porous cement or P cement (Porosectan®) |
|
| Powder package | 20 g powder | 20 g powder |
| Powder composition | - Polymethylmetacrylate 67.5% - Barium solphate 30,0% - Benzoyl peroxide 2.50% |
- Polymethylmetacrylate 65.0% - β-TRICALCIUM PHOSPHATE 30.0% - Barium sulphate 5.0% |
| Liquid package | 9.4 g phial | 5.0 g phial |
| Liquid composition | - Methylmetacrylate 99.10% - N-N dimethyl-p-toluidines 0.90% - Hydroquinone 75 ppm |
- Methylmetacrilate 98.20% - N-N dimethyl-p-toluidines 1.80% - Hydroquinone 75 ppm |
| Setting time | 21-25 min | 9 min |
| Max. polimerization temperature | 70°C | 44°C |
| Max water absorption | 3% | 20% |