[Intramedullary nailing of the distal tibia. Does angular stable locking make a difference?].

Area of Science:

• Orthopedic surgery
• Biomechanical engineering
• Traumatology

Context:

• Distal tibia fractures present challenges for stable osteosynthesis.
• Modern intramedullary nails offer diverse locking screw options to address these challenges.
• Expanding indications for intramedullary nailing necessitate understanding distal fixation techniques.

Purpose:

• To evaluate the mechanical stability of distal tibia fractures treated with intramedullary nailing.
• To determine the optimal configuration and features of locking screws for enhanced fixation.
• To assess the impact of interfragmentary compression and angular stability on osteosynthesis outcomes.

Summary:

• Optimal fixation of distal tibia fractures is achieved with at least two locking screws, ideally in a crossed configuration and widely spaced.
• Free-hand insertion techniques provide inherent angular stability through screw-nail and screw-bone jamming.
• Angular stable locking features integrated into the nail do not significantly enhance mechanical stability or fracture healing.

Impact:

• Provides evidence-based recommendations for optimizing intramedullary nailing in distal tibia fractures.
• Informs the design and application of intramedullary implants for improved patient outcomes.
• Highlights the importance of screw placement and configuration over specialized angular stable features for robust fixation.