A comparison of mandibular angle fracture plating techniques

Area of Science:

• Oral and Maxillofacial Surgery
• Biomechanical Engineering
• Orthopedic Research

Background:

• Mandibular angle fractures are common facial injuries.
• Effective fixation techniques are crucial for restoring function.
• Conventional plating methods require biomechanical evaluation against novel approaches.

Purpose of the Study:

• To compare the biomechanical stability of conventional mandibular angle fracture plating with two alternative techniques.
• To assess the resistance to vertical loads simulating masticatory forces.
• To determine the influence of plate thickness and configuration on fracture repair stability.

Main Methods:

• Three groups of synthetic hemimandibles underwent simulated fracture repair using different plating configurations.
• Testing involved applying vertical loads to assess resistance to deformation.
• A cantilever beam design and mechanical testing device were utilized.
• Statistical analysis employed a two-way analysis of variance.

Main Results:

• No statistically significant difference in vertical load resistance was observed between the conventional, nontraditional, and two-miniplate groups.
• The forces resisted were comparable across all tested configurations.
• All observed failures occurred at the superior border tension band fixation with monocortical screws.

Conclusions:

• Plate thickness and configuration did not significantly impact the biomechanical resistance to vertical loads in this in vitro study.
• The primary mode of failure involved monocortical screw fixation in the superior border tension band.
• Further investigation into superior border fixation methods may be warranted.