Biologic response to orthopedic sutures: a histologic study in a rabbit model

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Histopathology

Background:

• Biologic reactivity to suture materials is a critical factor influencing patient outcomes in orthopedic procedures.
• Understanding the inflammatory response to different suture types is essential for optimizing surgical success.

Purpose of the Study:

• To histologically evaluate the biologic reactivity of eight commonly used orthopedic sutures in a rabbit model.
• To compare the inflammatory response, giant cell presence, and capsular thickness associated with each suture material.

Main Methods:

• A rabbit model was used to assess the tissue response to Ethibond, Ticron, HiFi, Ultrabraid, MaxBraid, Orthocord, MagnumWire, and FiberWire sutures.
• Histologic evaluation included measurements of fibrous capsule thickness, giant cell counts, and inflammatory grading at 30, 60, and 120 days post-implantation.

Main Results:

• MagnumWire and Ticron sutures induced a more pronounced initial inflammatory reaction compared to other tested sutures.
• By 120 days, MagnumWire and Ticron exhibited fewer giant cells at the tissue-suture interface and within the capsule.
• These two suture types also demonstrated the greatest fibrous capsular thickness at 120 days.

Conclusions:

• Significant differences in biologic reactivity exist among commonly used orthopedic sutures, likely due to variations in material composition and braid characteristics.
• MagnumWire and Ticron sutures stimulate a more intense foreign body inflammatory response compared to other high-strength suture materials.