What is the role of radiographs in the early postoperative assessment of arthroplasty?

• A. Not useful in early postoperative period
• B. Baseline assessment of component position and alignment; monitor for early signs of malposition, fracture, or loosening
• C. Used only if pain suspected
• D. Used to measure bone density

Answer: (B)

Radiographs early after arthroplasty establish the baseline for implant position and limb alignment. They provide a clear view of how the components sit in the body right after surgery, including cup orientation and stem alignment, as well as leg length and offset. This baseline is crucial because it lets you detect subtle changes over time—such as subsidence, loosening, or early periprosthetic fracture—that may not yet cause symptoms but could affect implant longevity or stability. Early imaging also helps identify malposition that could lead to dislocation or abnormal wear, allowing timely intervention if needed. Radiographs are routinely used in the immediate postoperative period for safety and planning, even when the patient has no pain. They are not a tool for measuring bone density—that task relies on other imaging modalities like DEXA or CT. In essence, the radiograph serves as the reference snapshot of the reconstruction, guiding future comparisons and early management decisions.