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 .
Less Invasive Stabilization System (LISS) Versus Proximal Femoral Nail Anti-rotation (PFNA) in Treating Proximal Femoral Fractures: A Prospective Randomized Study
Objective : To evaluate the outcome and efficacy of LISS ( Less Invasive Stabilization System ; Synthes USA , Paoli , PA ) for the treatment of proximal femoral fractures to find another appropriate minimally invasive surgery for these fractures in which intramedullary nailing may be difficult . Design : A consecutive prospect i ve r and omized clinical study . Setting : University teaching hospital . Patients : Between May 2006 and March 2008 , 64 consecutive patients who had a proximal femoral fracture were r and omized to be treated with fixation with either LISS or PFNA ( Proximal Femoral Nail Anti-rotation ; Synthes USA ) . Intervention : LISS or PFNA fixation of proximal femoral fractures . Main Outcome Measurements : Intraoperative time , intraoperative blood loss , length of hospitalization , hip function ( Harris score ) , general complications , fracture complications . Results : Fifty-nine patients were evaluated with a mean follow-up time of 26.8 months ( range , 21–36 months ) . No statistical differences in general complications , intraoperative blood loss , length of hospitalization , or hip function could be found between the two groups . The average operative time was longer in the LISS group ( 98.25 minutes ) compared with the PFNA group ( 65.36 minutes ) ( P < 0.05 ) . One PFNA case had intrapelvic penetration of the helical blade ; two LISS cases had breakage of the screws . Conclusion : There were no major differences in outcome or complications between the treatment groups . LISS can be used effectively in treating proximal femoral fractures , especially for complex fractures patterns in which intramedullary nailing may be difficult . Level of Evidence : Therapeutic Level II . See page 128 for a complete description of levels of evidence
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 .