Functional Load Capacity of Teeth with Reduced Periodontal Support: A Finite Element Analysis

Area of Science:

• Biomechanical Engineering
• Dental Mechanics
• Periodontology

Background:

• The periodontal ligament (PDL) is crucial for tooth stability and function.
• Understanding PDL load capacity is vital for diagnosing and treating periodontal diseases.
• Numerical simulations offer a powerful tool to analyze complex biomechanical behaviors.

Purpose of the Study:

• To investigate the functional load capacity of the periodontal ligament (PDL) in a full arch maxilla and mandible model.
• To determine the functional load pattern in teeth with varying periodontal support.
• To analyze the impact of bone loss on PDL stress distribution.

Main Methods:

• Creation of 3D maxilla and mandible models from CBCT data.
• Segmentation of individual teeth and assignment of biomechanical properties.
• Finite Element Analysis (FEA) to simulate forces and analyze PDL stress under varying bone levels.

Main Results:

• Molars exhibited the highest load capacities (0.4-0.6 MPa), followed by premolars (0.4-0.5 MPa) and canines (0.3-0.4 MPa).
• Highest stress concentrations in the PDL were observed in cervical and apical areas of single-rooted teeth and molars, and furcation areas of molars.
• Progressive bone loss led to increased mechanical load on the remaining PDL structures.

Conclusions:

• Molars possess the greatest functional load capacity within the PDL.
• Cervical, apical, and furcation areas are critical zones for functional stress in the PDL.
• Bone loss significantly elevates mechanical stress on residual periodontal support, highlighting the importance of preserving bone levels.