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Articles

The effects of manufacturing tolerances and assembly force on the volumetric wear at the taper junction in modular total hip arthroplasty

, , , , &
Pages 1061-1072 | Received 26 Feb 2019, Accepted 01 Jun 2019, Published online: 17 Jun 2019

Figures & data

Figure 1. Taper mismatch scenarios.

Figure 1. Taper mismatch scenarios.

Figure 2. FE boundary conditions and loads.

Figure 2. FE boundary conditions and loads.

Figure 3. Micromotion plots for junctions assembled with 4 kN. The darkest red color indicates micromotion values which are above 70 µm.

Figure 3. Micromotion plots for junctions assembled with 4 kN. The darkest red color indicates micromotion values which are above 70 µm.

Figure 4. Contact pressures plots for junctions assembled with 4 kN.

Figure 4. Contact pressures plots for junctions assembled with 4 kN.

Figure 5. Plastic strain for 'Tip fit' assembled with 15 kN, and subsequently cyclic loaded, at the end of the simulation.

Figure 5. Plastic strain for 'Tip fit' assembled with 15 kN, and subsequently cyclic loaded, at the end of the simulation.

Figure 6. Wear depth contour plots, after simulation assembled with 4 kN.

Figure 6. Wear depth contour plots, after simulation assembled with 4 kN.

Figure 7. Initial wear rate up to 1 million cycles (left) and wear rate after 1 million cycles (right) for different tolerances and assembly forces. Lines are connected between 2, 4 and 15 kN assembly force to emphasize the trends found depending on the assembly force.

Figure 7. Initial wear rate up to 1 million cycles (left) and wear rate after 1 million cycles (right) for different tolerances and assembly forces. Lines are connected between 2, 4 and 15 kN assembly force to emphasize the trends found depending on the assembly force.

Figure 8. Volumetric wear after 10 million cycles.

Figure 8. Volumetric wear after 10 million cycles.