Deep periprosthetic joint infection following knee replacement is a serious complication feared by surgeons. Our aim was to investigate if seasonality of deep infection incidence exists in a national registry of knee replacement patients. We extracted data from over 100 000 procedures, investigating if patients operated on during the summer had increased risk of re-operation due to infection. We found no signal of periodicity, meaning the summer season is not a risk factor for deep infection.

Bacterial biofilm infections of artificial knees are treated by mixing antibiotics into bone cement and calcium sulfate beads. We designed a knee size model to show that cement alone killed biofilms on orthopedic materials and prevented their spread close to the cement, but adding beads significantly killed biofilms further away. The model is useful in helping show how both the spread and the amount of antibiotic carrier can kill biofilms that might be in different places in the joint.

In order to monitor pin site infections, facilitate communication between team members, and assist treatment decision-making, we aimed to develop a registration tool. The present pilot study evaluates the feasibility of a prospective registration procedure for reporting, evaluating, and monitoring of pin site infections in 39 trauma, limb deformity, and bone infection patients with external ring fixation.

We report the treatment of bone infection in a patient with a rare disease which causes overgrowth of the limb. Careful assessment of the scans showed that the infection was in some new bone which had formed in the soft tissues after a minor injury to the leg and not in one of the major bones. This made treatment much easier with a successful outcome.

Antibiotics are frequently used in bone cement during joint replacements or treatment of bone and joint infections. Amikacin is rarely used in bone cement, particularly the liquid formulation. We describe a series of patients in which liquid amikacin was incorporated into bone cement. We did not observe the occurrence of adverse drug reactions definitively attributed to its use. All patients had favorable outcomes.