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Do revision total hip augments provide appropriate modularity?

Matthew G Teeter1, Douglas D R Naudie1, James L Howard1

  • 1The Division of Orthopaedic Surgery, London Health Sciences Centre, London, Ont.

Canadian Journal of Surgery. Journal Canadien De Chirurgie
|January 27, 2015
PubMed
Summary
This summary is machine-generated.

Surgeons frequently use small porous metal acetabular augments during revision total hip arthroplasty. The study suggests the full range of available augment sizes may be excessive for current surgical demands.

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Implantology

Background:

  • Porous metal acetabular augments are crucial for addressing bone defects in revision total hip arthroplasty.
  • The study evaluates the adequacy of the current size range of these augments for clinical application.

Purpose of the Study:

  • To assess if the available sizes of porous metal acetabular augments align with the needs encountered in revision total hip arthroplasty.
  • To inform manufacturers about potential overstocking of certain augment sizes.

Main Methods:

  • Retrospective review of patient cases at a single institution involving porous revision shells.
  • Documentation of patient and implant characteristics for cases where augments were utilized.

Main Results:

  • A total of 281 patients were reviewed, with augments used in 24 cases.
  • Augment diameter distribution was significantly skewed towards smaller sizes (p < 0.001).
  • Thickness distribution was not significantly skewed (p = 0.05), with 21 of 24 augments being among the smallest three diameters and thicknesses.

Conclusions:

  • The current inventory of porous metal acetabular augments may include an unnecessary range of sizes.
  • Surgeons tend to opt for larger shells before considering larger augments, indicating a potential mismatch between supply and demand.
  • This suggests a need for manufacturers to re-evaluate their product sizing strategy for acetabular augments.