The clinical evidence behind the current implants used for proximal femoral fractures is weak considering the number of implants used worldwide .
Sporadic evaluation is not sufficient to identify long term problems .
INTRODUCTION Evaluation of the long-term performance of  implants used in trauma surgery relies on post-marked clinical studies since no registry based implant assessment exists .
The purpose of this study was to evaluate the evidence of performance of implants  currently used for treating proximal femoral fractures ( PFF ) in Denmark .
Risk factors in cutout of sliding hip screw in intertrochanteric fractures: an evaluation of 937 patients
The aim of this study was design ed to assess the risk factors of lag-screw cutout in the treatment of intertrochanteric fracture with a dynamic hip screw ( DHS ) . From 2003 to 2007 , 1,150 patients who had acute unilateral intertrochanteric fractures of the femur were enrolled to the study . All fractures were managed by closed reduction and internal fixation with 135 ° DHS devices . Patient demographics , fracture patterns , reduction and fixation and perioperative course parameters were all recorded . The follow-up period was 38 months on average ( range 16–60 months ) . Finally , 937 patients were available for evaluation of final results in which we focused on lag-screw cutout . Excluding complications not related to screw position , 64 patients ( 6.8 % ) with screw cutout were encountered , and the remaining 873 patients had uneventful union , with the average union time of 17.5 weeks ( range15–24 weeks ) . Upon analysis with logistic regression , the tip−apex distance ( TAD ) was shown to be the most important predictive factor for cutout , followed by screw position , fracture pattern , reduction and patient age . In order to decrease the risk of lag-screw cutout , it is important to ensure good fracture reduction and to place the lag screw in either the middle/middle or inferior/middle position with appropriate TAD
The clinical evidence behind the current implants used for proximal femoral fractures is weak considering the number of implants used worldwide .
Sporadic evaluation is not sufficient to identify long term problems .
INTRODUCTION Evaluation of the long-term performance of  implants used in trauma surgery relies on post-marked clinical studies since no registry based implant assessment exists .
The purpose of this study was to evaluate the evidence of performance of implants  currently used for treating proximal femoral fractures ( PFF ) in Denmark .