Postoperative Development of Bone Mineral Density and Muscle Strength in the Lower Limb After Cemented and Uncemented Total Hip Replacement

Table 1: Development of BMD and isometric muscle strength of operated and contralateral leg.

		BMD (g/cm²)			Strength (N)
		Operated Leg	Contralateral leg	p of Mann- Whitney-Test	Operated Leg	Contralateral Leg	p of Mann-Whitney-Test
Group A (uncemented Hipstar®)	preoperative (baseline)	1.337±0.143	1.316±0.160	0.540	918±635	1089±114	0.580
	3 months postoperative	1.313±0.147 p=0.045 *	1.332±0.163 p=0.153	0.940	926±397 p=0.199	1211±110 p=0.300	0.171
	6 months postoperative	1.294±0.150 p=0.001 *	1.327±0.155 p=0.616	0.754	1162±501 p=0.002 *	1500±104 p=0.016 *	0.128
	12 months postoperative	1.256±0.153 p=0.005 *	1.316±0.161 p=0.449	0.560	1363±682 p<0.001 *	1549±90 p=0.016 *	0.501
Group B (cemented Exeter®)	preoperative (baseline)	1.239±0.127	1.235±0.120	0.706	691±356	715±70	0.815
	3 months postoperative	1.244±0.128 p=0.643	1.248±0.130 p=0.36*	0.706	825±498 p=0.212	931±84 p=0.074	0.602
	6 months postoperative	1.247±0.132 p=0.896	1.253±0.131 p=0.163	0.667	942±535 p=0.007 *	1021±62 p=0.002 *	0.760
	12 months postoperative	1.257±0.126 p=0.049 *	1.247±0.133 p=0.147	0.733	1190±450 p<0.001 *	1094±95 p<0.001 *	0.577

Mean±SD, * p < 0.05 Wilcoxon-test compared with baseline.