“…Dislocations of prosthesis data was available for 19 studies (10 RCTs 5, [14][15][16][17][18][19]25,29,38 and 9 observational studies 20,26,27,32,34,36,37,39,40 Two observational studies reported data on loosening of prosthesis 24,27 . The pooled estimate (figure 9) showed no significant difference between the two compared groups…”