LagLoc-a new surgical technique for locking plate systems

Area of Science:

• Orthopaedic Surgery
• Biomechanical Engineering
• Trauma Management

Background:

• Oblique and spiral fractures present significant treatment challenges.
• Achieving interfragmentary compression is crucial for optimal fracture healing.
• Existing locked plating techniques may not consistently provide adequate compression.

Purpose of the Study:

• To introduce and evaluate the efficacy of the novel LagLoc technique for locked plating.
• To assess the ability of the LagLoc technique to generate interfragmentary compression.
• To compare the biomechanical performance of the LagLoc technique against conventional methods.

Main Methods:

• Simulated oblique diaphyseal fractures in artificial bones were plated using a seven-hole locking compression plate.
• Three groups were established: Group I (all locking screws), Group II (lag screw and locking screws), and Group III (LagLoc technique).
• Interfragmentary compression was measured using pressure sensors, with all screws tightened to 4 Nm.

Main Results:

• Group I exhibited significantly lower interfragmentary compression (167 N) compared to Groups II (431 N) and III (379 N).
• No significant difference in compression was observed between the lag screw (Group II) and LagLoc (Group III) techniques.
• The LagLoc technique successfully generated substantial interfragmentary compression.

Conclusions:

• The LagLoc technique provides an effective method for achieving interfragmentary compression in locked plating.
• This technique merges the biomechanical benefits of lag screw and locking screw fixation.
• LagLoc presents a valuable alternative for surgeons treating complex fractures requiring compression.