Efficient 3D finite element analysis of dental restorative procedures using micro-CT data

Area of Science:

• Biomechanical Engineering
• Dental Materials Science
• Computational Modeling

Background:

• Finite element analysis (FEA) is crucial for understanding dental biomechanics.
• Accurate modeling of complex dental structures and restorations presents challenges.
• Rapid and validated FEA model generation is needed for efficient research.

Purpose of the Study:

• To describe a novel, rapid method for generating validated 3D finite element models of dental structures.
• To simulate various cavity preparations and restorative materials within a mandibular molar model.
• To demonstrate the model's utility in analyzing cuspal deformation under occlusal loading.

Main Methods:

• Micro-CT scanning of a mandibular molar followed by interactive segmentation.
• Stereolithography (STL) file remeshing and Boolean operations for mesh congruence.
• Creation of 3D solid models in FEA software, validated via nonlinear contact analysis and experimental data.

Main Results:

• Validated FEA models were generated for unrestored and restored teeth (MO, MOD, endodontic access).
• Cuspal widening under 100 N load varied significantly with cavity preparation and restoration type.
• Porcelain inlays achieved 100% cuspal stiffness recovery, while composite resin achieved partial recovery.

Conclusions:

• The developed method rapidly generates detailed, valid 3D FEA models of molars with various restorations.
• The models accurately predict cuspal deformation, correlating well with experimental data.
• This efficient methodology is applicable to diverse dental and medical modeling applications.