Customized mandibular reconstruction plates improve mechanical performance in a mandibular reconstruction model.

Area of Science:

• Biomedical Engineering
• Materials Science
• Orthopedic Surgery

Background:

• Mandibular reconstruction requires implants with high biomechanical stability.
• Standard reconstruction plates may not always meet the demands of complex cases.
• Optimizing implant design is crucial for successful patient outcomes.

Purpose of the Study:

• To analyze the biomechanical performance of customized mandibular reconstruction plates.
• To determine optimal locations for increasing bar widths to enhance plate strength.
• To compare the mechanical performance of customized versus standard plates.

Main Methods:

• Sensitivity analysis was used to identify optimal locations for increased bar widths.
• Standard and customized plates were mounted on physical mandible models.
• Mechanical testing was performed to evaluate stress reduction and fatigue performance.

Main Results:

• Increasing bar widths reduced maximum stress in the plate by 31% (from 573 to 393 MPa).
• Customized plates exhibited a significantly greater median fatigue limit (650 ± 27 N) compared to standard plates (475 ± 27 N).
• Optimized bar widths at case-specific locations effectively improved plate fatigue performance.

Conclusions:

• Customized mandibular reconstruction plates with optimized bar widths offer superior biomechanical performance.
• Design modifications, such as increased bar widths, are effective strategies for enhancing implant durability.
• This approach holds promise for improving the success rates of mandibular reconstructions.