TABLE I.
Composition of the PMMA bone cements.
| Powder compositiona | Palacos R (40 g) | Palacos LV (40 g) |
|---|---|---|
| Poly (methyl acrylate, methyl methacrylate) | 33.8 g (84.5%) | 33.6 g (84%) |
| Zirconium dioxide | 5.9 g (14.75%) | 6 g (15%) |
| Hydrous benzoyl peroxide | 0.3 g (0.75%) | 0.4 g (1%) |
| Liquid compositiona | Palacos R and Palacos LV (20 ml) | |
| Methyl methacrylate | 19.6 ml (97.9%) | |
| N,N-dimethyl-p-toluidine | 0.4 ml (2.1%) | |
a
Other constituents such as chlorophyll VIII in the powder, hydroquinone, and chlorophyll VIII in the liquid are mentioned by the manufacturer without exact quantity. Usually, these constituents are on the order of ppm.