It struck me, that if this happened to someone whose world and home was already under threat, under attack, either outside or inside, that sensation of dislocation might have swelled to the sense that it can't be controlled".
If stress were applied to this structure, it might shear along a plane where the bonds were weakest, and the dislocation might slip to the next atomic position, where the bonds would be re-established.
As suspected by others, the small amount of secondary dislocation might be due to the relative distal, almost subchondral screw position of the distal 2.2-mm fine-threaded miniscrews [23].
Therefore, surgeons using this approach in patients with a high risk of dislocation might consider selecting a more suitable implant.
In contrast, Haraguchi et al. [ 27] suggested that recurrent dislocation might not have been the cause of the surface roughening.
It was possible that mechanical instability, pain, and cement spacer dislocation might be avoided through increasing the strength of these cement spacers [ 10, 11, 13].
Thus, the low risk of revision of MoM THA due to dislocation might be explained by the fact that MoM THAs in that study mainly had head sizes larger than 37 mm.
The situation for the smaller particles (30 nm × 15 nm) might be slightly more uncertain because the particle size approaches the average grain size and questions related to the thermodynamic stability of, e.g., a grain boundary or even a dislocation, might become relevant.
The TEM images revealed clear and convincing evidence for the increase in defect clusters (probably interstitial clusters), basal plane bending, and basal plane dislocations, which might be the main reason for property changes.
There were no dislocations, which might be explained by the use of 32-mm heads and the telescopic capacity of the rotating trunnion bearing, experience of the surgeon [ 29], and the use of an anterolateral approach [ 57].
