Chewing stress developed in upper anterior teeth with root end resection. a finite element analysis study

Area of Science:

• Dental biomechanics
• Endodontics
• Materials science

Background:

• Pulpless teeth are susceptible to vertical root fracture.
• Root end resection is a common endodontic procedure.
• Understanding the mechanical impact of root end resection is crucial for treatment planning.

Purpose of the Study:

• To investigate the effect of root end resection on the mechanical resistance of pulpless teeth.
• To evaluate stress and deformation under varying loads using finite element analysis.

Main Methods:

• Finite element analysis (FEA) was employed.
• Simulated loading at 100N and 300N was applied to upper anterior teeth models.
• Stress and deformation patterns were analyzed.

Main Results:

• A 100N load caused a mild increase in dentin stress, affecting the entire tooth-bone structure.
• A 300N load resulted in significant vertical and mesiodistal deformations.
• The highest stress occurred vertically on the labial surface, approaching dentin's Young's modulus.

Conclusions:

• Root end resection mildly decreases mechanical resistance at 100N.
• A 300N load induces risky stress and deformation, primarily at the cervical area.
• Alveolar bone stress remained below the risk threshold.