Bone injury caused by curing bone cement. A vital microscopic study in the rabbit tibia

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Surgical Research

Background:

• Bone cement is widely used in orthopedic surgery.
• Monomer leakage from curing bone cement can cause local tissue damage.
• Understanding the extent and nature of this trauma is crucial for patient outcomes.

Purpose of the Study:

• To investigate the tissue trauma caused by monomer leakage from curing bone cement.
• To characterize the immediate and long-term vascular and cellular responses to monomer exposure.
• To determine if tissue type influences the severity of monomer-induced damage.

Main Methods:

• Utilized a chamber method for intravital microscopy in rabbit bone models.
• Observed tissue response from cement application up to 350 days post-application.
• Correlated vascular disturbances with specific tissue types (fatty marrow, bone, fibrous tissue).

Main Results:

• Immediate effects included vascular disturbances such as blood flow disturbances, standstill, and intravascular hemolysis.
• The extent of vascular disturbance was significantly greater in fatty marrow compared to bone or fibrous tissue.
• Marked resorption of marrow fat cells occurred within weeks, while bone resorption was minimal.

Conclusions:

• Monomer leakage from bone cement induces significant vascular trauma, with effects dependent on tissue lipid content.
• Fatty marrow is particularly susceptible to monomer-induced vascular damage.
• The study highlights differential tissue responses to bone cement monomer, with implications for surgical procedures and biomaterial development.