Research Article
Acetabular Debonding: An Investigation of Porous Coating Delamination in Hip Resurfacing Arthroplasty
Table 2
Comparison of acetabular component design and manufacturing processes.
| | Corin Cormet 2000 | Biomet M2a-Magnum |
| | Acetabular Diameter Difference (Outer-Inner Diameter) | 6-8 mm [18] | 6 mm [19] |
| | Bulk alloy | CoCrMo [18, 20] | CoCrMo [19] |
| | Carbon content | “High” [4, 5], 0.2-.35% [18] | "High" [21], 0.23-.28% [19] |
| | Surface coating | Dual plasma spray (Ti+ HA) [18] | Plasma spray (Ti) [19] |
| | Heat treatment | Yes [18] | No [19] |
| | Manufacturing process | Cast [21] with hot isostatic pressing and solution annealing [18] | As cast [21] |
| | Roughening of cast implant | Honed with a shotblast of alumina grit [22] | Honed with a shotblast of alumina grit [19] |
| | Sphericity | 3.8 µm [21], <10 µm [18] | 1.9 μm [21], 5 μm [19] |
| | Surface roughness | 0.030 um [21] | 0.031 um [21] |
| | Equator/peripheral thickness | 4 mm [23], 5.6 mm [21], 4.2 mm (our measurement) | 3 mm [19], 3.4 mm [21], 3 mm (our measurement) |
| | Apex thickness | 3 mm [23] | 6 mm [19] |
| | Coverage arc for implants with bearing size 40-56mm | 160-1660 [20] | 156-1620 [19] |
| | Radial clearance | 97.67 µm (Medium) [21], 75-200 µm [22] | 120.93 µm (High) [21], 75-150 µm [19] |
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Bold with asterisks represents difference. |
