Biomechanical Evaluation Of The Dynamic Hip Screw With Two-and Four-Side Plates

Objective: Intertrochanteric fractures occur in approximately 50 percent of all hip fractures.Surgical repair of stable and unstable intertrochanteric fractures requires internal fixation.Multiple devices including fixed angle devices , intramedullary devices and hip screws etc.In our country,the hip screw(DHS) is the most commonly used devices .Decreasing the longth of the side plate of dynamic hip screw would theoretically have a favorable effect by allowing a smaller incision and approach,a shorter surgical time,decreased operative blooding loss,and minimal periosteal stripping.All of these factors would,in all likehood,shorten the hospital stay and enhance the healing and rehabilitation potentialo elderly patient with an unstable intertrochanteric hip fracture, and may ultimately result in fewer complications.We derermine the biomechanical quality of a dynamic hip screw with a two-hole side-plate as compared with a four-hole side-plate design for the reconstruction of unstable three-part intertrochanteric fractures.Methods: Sixteen matched pairs of elbalmed adult cadaveric femora(age from 50 ～ 59) were obtained and skeletonized.Radiographs were taken of each each femur to rule out bone pathology,to assess femoral anatomy and to estimate...