The endpoints based on revision of any component were relevant, since delamination of HA from stems could have had a negative influence on cup survival, and the presence of HA coating on stems could hypothetically also have influenced the risk of infection.
We therefore believe that HA coating of stem components is not associated with clinically relevant effects on the survival of THA stems, and we question the use of HA coatings on well-functioning stems.
The use of HA coating on stems available both with and without this surface treatment had no clinically relevant effect on their outcome, and we thus question whether HA coating adds any value to well-functioning stem designs.
Thus, absence of statistically significant effects of HA coating on stem survival does not necessarily imply that HA coating has no effect; i.e., the analysis is open to a type-II error.
These include covering the roses with coated paper or plastic bags instead of damp moss to retain humidity and applying a wax coating to stems of dormant stock to inhibit desiccation.
However, in a previous Swedish registry study, HA coating of Bimetric stems was not found to be associated with statistically significant effects on stem survival for any reason or due to aseptic loosening, which is in line with the present findings (Lazarinis et al. 2011).
It is still being debated whether HA coating of uncemented stems used in total hip arthroplasty (THA) improves implant survival.
Porous coating of the stem with titanium alloy should achieve osseointegration at the bone metal interface.
Compared to earlier studies our results thus indicate that concerning subsidence, HA coating of the Taperloc stem is beneficial.
The trait, the coating of leaf and stem surfaces with a waxy whitish substance, is called glaucousness.
Ag/SiO x C y plasma-polymer-coating of the stem (Bio-Gate AG, Bremen, Germany) was performed as described by Khalilpour et al. [ 13].
