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Early Tibial Component Fractures in a Cementless, 3D-Printed, Titanium Implant.

Alan D Lam1, Gavan P Duffy1

  • 1Southeast Orthopedic Specialists, Jacksonville, FL, USA.

Arthroplasty Today
|October 21, 2022
PubMed
Summary

This study reports the first known case of fatigue fracture in a 3D-printed, porous titanium tibial component used in cementless total knee arthroplasty. Regular radiographic monitoring is recommended to ensure proper component alignment and positioning.

Keywords:
Cementless fractureRevision total knee arthroplastyTibial componentTotal knee arthroplasty

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Mechanical engineering

Background:

  • Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
  • Cementless tibial components offer potential advantages but require robust design.
  • Component fracture is a rare but serious complication.

Observation:

  • This case series presents the first documented instance of fatigue fracture in a cementless, 3D-printed, highly porous titanium tibial baseplate.
  • The fracture occurred in the short- to mid-term follow-up period.
  • The component's highly porous structure is a key characteristic.

Findings:

  • Fatigue fracture of a cementless, 3D-printed, highly porous titanium tibial component in TKA has been observed.
  • This represents a novel failure mode for this type of implant.
  • The specific design and material properties may contribute to fatigue susceptibility.

Implications:

  • Highlights the need for careful design and material selection in 3D-printed orthopedic implants.
  • Suggests that fatigue analysis is crucial for highly porous metallic implants.
  • Emphasizes the importance of vigilant radiographic surveillance for early detection of potential component issues in TKA.