J Orthopaed Traumatol (2012) 13:137–143 141 Fig. 2 a Translation along the x-axis. The graph represents the mean and 95 % conﬁdence interval (CI) for the pooled data. b Translation along the y-axis. The graph represents the mean and 95 % conﬁdence interval (CI) for the pooled data. c Translation along the z-axis. The graph represents the mean and 95 % conﬁdence interval (CI) for the pooled data. d Rotation around the x-axis. The graph represents the mean and 95 % conﬁdence interval (CI) for the pooled data. e Rotation around the y-axis. The graph represents the mean and 95 % conﬁdence interval (CI) for the pooled data. f Rotation around the z- axis. The graph represents the mean and 95 % conﬁdence interval (CI) for the pooled data the stem will tend to push the stem distally and rotate the stem internally inside the cement mantle. Consequently, the migration pattern presented herein should be expected. The results presented in Fig. 2b, e indicate persistent stem migration for both subsidence and internal rotation. Even though the subsidence is minor, it indicates persistent 123