Figures & data
Figure 1. Taperloc stem coated with Bonemaster.
Table 1. Coefficient of variation (CV) in per cent for the 3 densiometers used in 7 Gruen zones
Figure 2. Flow chart of the patients with DXA and RSA measurements. The patient lost to follow-up had an HA-coated stem inserted at hospital A. 17 BM-coated stems were inserted at hospital A and 14 BM-coated stems were inserted at hospital B. 13 HA-coated stems were inserted at hospital A and 11 HA-coated stems were inserted at hospital B. Those patients who were not analyzed by RSA did not meet the criteria of a maximum condition number of 100 or mean error of less than 0.3.
Table 2. Periprosthetic changes in bone mineral density around hydroxyapatite- (HA-) and Bonemaster- (BM-) coated Taperloc stems measured by dual-energy X-ray absorbtiometry (DXA). Results are given in percentage (standard deviation) of postoperative values after 3 months, 6 months, 1 year, and 2 years
Figure 3. Subsidence (0.25 (HA) and 0.28 (BM) mm in the first 2 years) after implantation of hydroxyapatite- (HA-) and Bonemaster- (BM-) coated Taperloc stems, analyzed by radiostereometric analysis (RSA). Results are given in mm with standard error of the mean after 3 months, 6 months, 1 year, and 2 years.
Figure 4. Retroversion of hydroxyapatite- (HA-) and Bonemaster- (BM-) coated Taperloc stems after 2 years, analyzed by radiostereometric analysis. Results are in degrees with standard error of the mean.
