Table 4.
Reported values of quantified material loss from head-stem tapers in previous studies
| Measured surface |
Bearing type | Study | Number of components | Mean volume (± SD)* (range) mm3 | Mean rate (± SD)* (range) mm3/year |
|---|---|---|---|---|---|
| Female taper | CoCr heads (diameter < 40 mm) |
Current Study | 50 | 0.39 (± 0.83) (0–4.34) | 0.29 (± 1.24) (0–8.67) |
| Large-head MOM (diameter ≥ 40 mm) |
Hothi et al. [15] | 150 | 1.52 (0.13–25.89) | N/A | |
| Langton et al. [18] | 111 | N/A | Design I: 0.13 (0.01–3.15) Design II: 0.44 (0.02–8.34) |
||
| Bishop et al. [4] | 5 | 8.4 (2.6–20.2) | 2.02 (0.6–4.9) | ||
| Male taper | CoCr heads (diameter < 40 mm) |
Current Study | 50 | 0.10 (± 0.37) (0–2.5) | 0.04 (± 0.08) (0–0.32) |
| Ceramic | Current Study | 50 | 0.04 (±0.14) (0–0.74) | 0.02 (± 0.08) (0–0.37) | |
| Large-head MOM (diameter ≥ 40 mm) |
Matthies et al. [19] | 36 | 0.29 (0–0.83) | 0.08 (0–0.36) | |
| Bishop et al. [4] | 2 | 0.03 (0.02–0.035) | 0.01 (0.005–0.006) | ||
| Liner backside | Large-head MOM (diameter ≥ 40 mm) |
Agne et al. [1] | 21 | 0.4 (0–1.7) | 0.2 (0–1.2) |
* Added when available; SD available only for the current study; CoCr = cobalt chromium; MoM = metal on metal; N/A = not available.