Table 1.

Mean bone mineral density (BMD) (g/cm²) of the seven regions of interest during the 2-year follow-up after implantation of the Bicontact® stem

ROI	1 week preoperatively	SD	1 week postoperatively (baseline value)	SD	6 months postoperatively	SD	1 year postoperatively	SD	2 years postoperatively	SD
1	0.73	0.18	0.85*	0.15	0.76**	0.16	0.75**	0.17	0.74**	0.16
2	1.14	0.24	1.59*	0.29	1.44**	0.20	1.51	0.27	1.49	0.24
3	1.76	0.24	1.78	0.24	1.68**	0.20	1.67	0.23	1.77	0.24
4	1.86	0.24	1.80*	0.25	1.85	0.28	1.85	0.25	1.91**	0.30
5	1.83	0.25	1.88	0.21	1.85	0.23	1.82	0.22	1.79**	0.18
6	1.41	0.26	1.41	0.23	1.39**	0.22	1.47	0.22	1.47	0.26
7	1.04	0.32	1.08	0.28	0.90**	0.29	1.03	0.30	0.99	0.37

ROI Regions of interest 1–7 , SD Standard deviation

*Significant change to preoperative value (Wilcoxon signed-ranks test, p < 0.05)

**Significant change to baseline value 1 week after surgery (Wilcoxon signed-ranks test, p < 0.05)