Titanium-induced arthropathy associated with polyethylene-metal separation after total joint replacement

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Radiology

Background:

• Complications following total joint replacement surgeries are common.
• Displacement of polyethylene components can occur in knee and hip arthroplasty.
• Titanium particle deposition can lead to arthropathy.

Purpose of the Study:

• To review clinical, radiographic, surgical, and pathologic findings in patients with displaced polyethylene components.
• To identify imaging modalities for detecting subtle polyethylene displacement.
• To investigate the cause of periarticular opacities and associated arthropathy.

Main Methods:

• Review of five patients with polyethylene component displacement in hip and knee replacements.
• Analysis of clinical, radiographic, surgical, and pathologic data.
• Evaluation of conventional radiography and advanced imaging techniques (magnification, phosphor plate, soft-tissue radiography, tomography, arthrography).

Main Results:

• Abnormal metal component positioning and periarticular deposits were observed in radiographic assessments.
• Pathologic analysis confirmed titanium particle deposition causing arthropathy in the absence of polyethylene.
• Subtle polyethylene component displacement was identified, requiring advanced imaging for clear visualization.

Conclusions:

• Displaced polyethylene components in joint replacements can lead to titanium-induced arthropathy.
• Early recognition of these complications is essential for timely intervention.
• Advanced imaging techniques improve the detection of polyethylene displacement, potentially enabling less invasive surgical revision.