dynamic hip screw
{{Short description|Orthopedic implant}}
Dynamic hip screw (DHS) or Sliding Screw Fixation is a type of orthopaedic implant designed for fixation of certain types of hip fractures which allows controlled dynamic sliding of the femoral head component along the construct.{{Citation needed|date=November 2019}} It is the most commonly used implant for extracapsular fractures of the hip,{{Cite journal|last1=Sambandam|first1=Senthil Nathan|last2=Chandrasekharan|first2=Jayadev|last3=Mounasamy|first3=Varatharaj|last4=Mauffrey|first4=Cyril|date=2016-05-01|title=Intertrochanteric fractures: a review of fixation methods|journal=European Journal of Orthopaedic Surgery & Traumatology|language=en|volume=26|issue=4|pages=339–353|doi=10.1007/s00590-016-1757-z|pmid=27028746|s2cid=11320833 |issn=1432-1068}} which are common in older osteoporotic patients. There are 3 components of a dynamic hip screw, including a lag screw (inserted into the neck of the femur), a sideplate and several cortical screws (fixated into the proximal femoral shaft). The idea behind the dynamic compression is that the femoral head component is allowed to move along one plane; since bone responds to dynamic stresses, the native femur may undergo primary healing: cells join along boundaries, resulting in a robust joint requiring no remodeling.
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