Impingement with total hip replacement.

@article{Malik2007ImpingementWT,
  title={Impingement with total hip replacement.},
  author={Aamer Malik and Aditya V. Maheshwari and Lawrence D. Dorr},
  journal={The Journal of bone and joint surgery. American volume},
  year={2007},
  volume={89 8},
  pages={
          1832-42
        }
}
Impingement is a cause of poor outcomes of prosthetic hip arthroplasty; it can lead to instability, accelerated wear, and unexplained pain. Impingement is influenced by prosthetic design, component position, biomechanical factors, and patient variables. Evidence linking impingement to dislocation and accelerated wear comes from implant retrieval studies. Operative principles that maximize an impingement-free range of motion include correct combined acetabular and femoral anteversion and an… 
Correction of Femoral Acetabular Impingement at the Time of Primary THA
TLDR
This study prospectively removed all impinging anterior retroverted bone during the THA procedure and shows that the anterior acetabular rim and part of the anterior column can be removed at the time of primary THA without compromising the ThA procedure.
Notching of the Femoral Stem Neck in Metal-on-Metal Total Hip Replacement: A Case Report
We report a case of impingement in a metal-on-metal total hip replacement causing both notching of the femoral stem neck and aseptic loosening of the acetabular component. The acetabular component
[Impingement Free Motion in Total Hip Arthroplasty - How Can We Implement It?].
  • K. Widmer
  • Medicine
    Zeitschrift fur Orthopadie und Unfallchirurgie
  • 2016
TLDR
The concept of the combined safe zone (cSafe-Zone) provides clear guidelines how to position both components of a total hip prosthesis in order to maximise range of movement and to reduce the risk of prosthetic impingement.
Have large femoral heads reduced prosthetic impingement in total hip arthroplasty?
TLDR
It was showed that larger head sizes are associated with decreased incidence of impingement on retrieved acetabular liners when compared to smaller head sizes, which indicates that larger heads have reduced but not eliminated impingements, which remains a potential source of instability.
The Acetabular Component in Primary Total Hip Arthroplasty
TLDR
The ability to reposition a cementless cup to optimize component orientation allows the joint replacement surgeon to minimize impingement and maximize component stability, essential to prevent dislocation and damage to bearing surface of the acetabular component.
Arthroscopic treatment of unstable total hip replacement.
Oversized acetabular socket causing groin pain after total hip arthroplasty.
Soft tissue restricts impingement-free mobility in total hip arthroplasty
TLDR
Soft tissue has a major impact on impingement-free ROM after THA, and future models of patient individual joint replacement including pre-operative (CT) planning and intra-operative navigation should include algorithms additionally accounting for soft tissue impingements.
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TLDR
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TLDR
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The five cases presented, involving six hips, illustrate how bipolar cup-stem impingement may result in significant wear-induced femoral osteolysis.
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TLDR
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TLDR
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TLDR
In the seven patients who had reoperations, the cause of dislocation diagnosed by CT was confirmed in only two cases and muscular imbalance rather than malposition of the components was the major factor determining dislocation.
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