Specific material effects of wear-particle-induced inflammation and osteolysis at the bone–implant interface: A rat model

Lisa K. Longhofer, Alexander Chong, Nora M. Strong, Paul H. Wooley, Shang You Yang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Introduction Wear particles produced from prosthetic joints may play critical roles in periprosthetic inflammatory reactions and osteolysis. The objective of this study was to quantify and compare the response to wear debris from different biomaterials at the bone–implant interface in a rat knee model. Methods Sixty rats were divided into titanium alloy (Ti–6Al–4V), cobalt chromium (Co–Cr), ceramic (Al 2 O 3 ), ultrahigh molecular weight polyethylene (UHMWPE), and control (phosphate buffered saline) groups with 12 animals per group. A nonweight-bearing titanium rod was implanted into the right distal femur of each rat followed by intra-articular injections of the biomaterial particles to the surgical knees for up to 16 weeks. Micro-computed tomography scanning was performed monthly and at the time of sacrifice to determine bone densities around the bone–implant interface. Histological evaluations were executed to quantify local inflammatory reactions and osteoclastogenesis. Results Co–Cr particles resulted in the most severe reductions in bone density. UHMWPE and ceramic particles resulted in a rapid reduction in bone density followed by a recovery. Inflammatory pseudo-membranes were ubiquitously present close to the femoral condyle and pin insertion site. Ceramic particles significantly promoted periprosthetic tissue formation compared with the other groups (p < 0.05). Cathepsin K positive cells were dominantly present at the peri-implant site following challenges of metallic alloy and ceramic particles. Conclusion Different biomaterials in particulate form exert different forms of adverse effects in terms of the amount of osteolysis and inflammatory reactions on bone tissue at the bone–implant interface. It provides information for engineering more appropriate materials for arthroplasty components.

Original languageEnglish (US)
Pages (from-to)5-11
Number of pages7
JournalJournal of Orthopaedic Translation
Volume8
DOIs
StatePublished - Jan 1 2017

Fingerprint

Osteolysis
Ceramics
Biocompatible Materials
Bone Density
Inflammation
Titanium
Knee
Chromium Alloys
Cathepsin K
Bone and Bones
Intra-Articular Injections
Chromium
Thigh
Cobalt
Osteogenesis
Arthroplasty
Femur
Joints
Phosphates
Tomography

Keywords

  • aseptic loosening
  • inflammation
  • osteoclastogenesis
  • rat model
  • wear debris

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Specific material effects of wear-particle-induced inflammation and osteolysis at the bone–implant interface : A rat model. / Longhofer, Lisa K.; Chong, Alexander; Strong, Nora M.; Wooley, Paul H.; Yang, Shang You.

In: Journal of Orthopaedic Translation, Vol. 8, 01.01.2017, p. 5-11.

Research output: Contribution to journalArticle

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