Table 2.
Overview of wrought alloy samples*
| Implant design | Sample number | Time in situ | Head size | Taper type | Damage score | Column damage | Alloy type | Banded structure |
|---|---|---|---|---|---|---|---|---|
| (months) | (mm) | |||||||
| HA-1 | HA-1-1 | 122.1 | 28 | 12/14 | 1 | N | 2 | N |
| HA-1-2 | 29.8 | 36 | 12/14 | 4 | N | 2 | N | |
| HA-1-3 | 16.7 | 32 | 12/14 | 4 | N | 1 | Y | |
| HA-1-4 | 176.8 | 32 | 12/14 | 4 | Y | 2 | Y | |
| HA-2 | HA-2-1 | 31.4 | 36 | 12/14 | 4 | Y | 1 | Y |
| HA-2-2 | 53.9 | 36 | 12/14 | 3 | N | 1 | Y | |
| HA-2-3 | 84 | 36 | 12/14 | 1 | N | 2 | Y | |
| HA-2-4 | 77 | 32 | 12/14 | 4 | Y | 2 | Y | |
| HA-3 | HA-3-1 | 1.1 | 32 | 12/14 | 4 | Y | 2 | Y |
| HA-3-2 | 83.1 | 32 | 12/14 | 4 | Y | 2 | Y | |
| HA-3-3 | 24.5 | 32 | 12/14 | 4 | Y | 1 | Y | |
| HA-3-4 | 60.8 | 40 | 12/14 | 1 | N | 1 | Y | |
| HA-3-5 | 98.9 | 28 | 12/14 | 1 | N | 1 | Y | |
| SA-4 | SA-4-1 | 111.3 | – | 12/14 | 3 | N | 2 | N |
| SA-4-2 | NA | – | 12/14 | 4 | N | 2 | N |
* Alloys came from three head designs and one stem design made by three different manufacturers (HA-1, HA-2, HA-3, and SA-4); there were four components for HA-1 and HA-2, five components for HA-3, and two components for SA-4; the damage score was a modified Goldberg score [12]; alloy type refers to alloys with a hard phase volume fraction of < 1% (Type 1) or 1% to 5% (Type 2); N = no; Y = yes; NA = not available.