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Computed Tomography and Optical Imaging of Osteogenesis-angiogenesis Coupling to Assess Integration of Cranial Bone Autografts and Allografts
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Does using autograft bone chips achieve consistent bone ingrowth in primary TKA?

Roy D Bloebaum1, Karyn E Koller, Bettina M Willie

  • 1Bone and Joint Research Laboratory (151F), Department of Veterans Affairs Salt Lake City Health Care System, 500 Foothill Drive, Salt Lake City, UT 84148, USA. Roy.Bloebaum@hsc.utah.edu

Clinical Orthopaedics and Related Research
|December 20, 2011
PubMed
Summary
This summary is machine-generated.

In total knee replacement (TKA), bone ingrowth did not exceed host bone levels, even with autograft chips. Bone ingrowth increased over time, but osteolysis did not progress, suggesting host bone quantity limits cementless fixation durability.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Biomechanical Engineering

Background:

  • Cementless fixation in total knee arthroplasty (TKA) faces challenges in achieving consistent skeletal attachment.
  • Predictive factors for durable cementless fixation are not fully understood.
  • This study investigated if host bone quantity and autograft bone chips enhance bone ingrowth.

Purpose of the Study:

  • To determine if autograft bone chips increase bone ingrowth compared to periprosthetic and host bone.
  • To assess if bone ingrowth increases with implantation time.
  • To evaluate the progression of osteolysis over time in cementless TKA components.

Main Methods:

  • Analysis of 19 postmortem retrieved cementless primary total knee implants.
  • Measurement of bone within porous-coated, periprosthetic, and host bone regions.
  • Radiographic assessment of bone apposition and osteolysis progression.

Main Results:

  • Bone ingrowth was generally less than periprosthetic and host bone, significantly so in the patellar component.
  • Bone ingrowth demonstrated an increase across all components over time.
  • Osteolysis along the porous-coated interface and screw tracts did not progress with implantation time.

Conclusions:

  • Bone ingrowth in cementless TKA designs did not surpass host bone levels, indicating host bone quantity is a limiting factor.
  • The potential for durable fixation in osteopenic bone remains uncertain.
  • Long-term studies are needed to fully understand cementless fixation in diverse bone qualities.