Table 3 Summary of maximum transformation rate and surface roughness of retrieved yttria stabilized zirconia heads
| Â | N | Duration | Transformation rate | Surface roughness |
|---|---|---|---|---|
|  |  | (years) | (%) | Ra (μm) |
Hayaishi et al. [24] | 1 | 1 |     13 |     0.01 |
Hernigou et al. [26] | 3 | 8-11 |     30 |     0.05 |
Haraguchi et al. [27] | 2 | 3, 6 |     37 |     0.12 |
Roy et al. [23] | 7 | 0.04-11 |     49 |     0.03 |
Fernandez-Fairen et al. [8] | 47 | 2-10 |     65 |     0.30 |
Santos et al. [28] | 18 | 0.2-10 |     70 |     0.04 |
Present study | 3 | 1.5-3 |     51 |     0.06 |