The Dynamic Hip Screw Implant System

1. Front Matter

   Pages i-v

   PDF

2. Introduction

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 1-3

3. The Problem of Trochanteric Fractures

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 4-4

4. DHS Implant System

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 5-16

5. Application of the DHS: Clinical Examples

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 17-32

6. Clinical Results: A Comparison

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 33-35

7. Laboratory Tests with the DHS

   • P. Comte

   Pages 37-45

8. Summary

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 47-47

9. References

   • Pietro Regazzoni, Thomas Rüedi, Robert Winquist, Martin Allgöwer

   Pages 49-50

10. Back Matter

    Pages 51-51

    PDF

The AOjASIF* dynamic hip screw (DRS) has been designed primarily to stabilize trochanteric fractures of the hip. Selected fractures of the femoral neck and some subtrochanteric fractures are further indications for the DRS [40, 46]. The dynam­ ic condylar screw (DCS) has been developed for fractures of the distal femur and is now being tested clinically. The DRS and DCS are carefully coordinated with the preexisting ASIF standard sets of equipment for internal fixation of fractures. The concept of a sliding screw for trochanteric fractures is not new. The first author describing such an implant was Schumpelick [44]; he gives credit to Pohl [22], who was primarily a manufacturer working for Gerhardt Kiinscher. Re described the possibility of impaction at the fracture site with a sliding device. In the United States Clawson [7, 8] introduced the hip screw and found it to be extremely beneficial in trochanteric fractures. At approximately the same time, Massie [31, 32] and Pugh [39] designed the sliding-type flange nails, which offer similar intramedullary splinting with the possibility of fracture impaction. The following chapters describe the concept and design features of the DRS, as well as the details of the surgical technique. The application of the DRS for different types of fractures is illustrated with clinical examples. The results of 268 cases of trochanteric fractures treated with the DRS are presented and compared with results using the angled blade plate and Ender's nails. Finally, some laboratory tests are described.

• System
• fixation
• fracture
• hip
• implant
• Trauma Surgery

• Departement Chirurgie der Universität, Basel, Switzerland

  Pietro Regazzoni

• Departement Chirurgie, Rätisches Kantonsspital Chur, Chur, Switzerland

  Thomas Rüedi

• Orthopedic Physicians, Inc., P.S., Seattle, USA

  Robert Winquist

• Basel, Switzerland

  Martin Allgöwer

Policies and ethics