Comparative evaluation of ten different condylar base fracture osteosynthesis techniques

Area of Science:

• Oral and Maxillofacial Surgery
• Biomechanical Engineering
• Orthopedic Research

Background:

• Mandibular condyle fractures are common.
• Optimal osteosynthesis methods require biomechanical validation.

Purpose of the Study:

• To compare the biomechanical stability of ten different osteosynthesis systems for mandibular condyle base fractures.
• To evaluate fixation stability under various force directions.

Main Methods:

• 164 minipig mandible fractures were fixed using ten distinct osteosynthesis systems.
• A two-point bending test was performed in four force directions (lateral-medial, anterior-distal, distal-anterior, medial-lateral).
• A universal testing machine measured forces until osteosynthesis failure.

Main Results:

• The Eckelt lag screw showed mechanical load capacity advantages when force was applied medial to lateral.
• Fixation with a single resorbable miniplate was not functionally stable.
• Two miniplates demonstrated the highest stability irrespective of force direction.

Conclusions:

• The choice of osteosynthesis technique significantly impacts biomechanical stability in mandibular condyle fractures.
• Single resorbable miniplates are not recommended for functional stability.
• Dual miniplate fixation provides superior stability for these fractures.