Stress distribution changes after root canal therapy in canine model: a finite element study

Area of Science:

• Biomaterials Science
• Dental Biomechanics
• Endodontics

Background:

• The fracture strength of endodontically treated teeth versus vital teeth remains controversial.
• The impact of root canal therapy on tooth stress distribution is not fully understood.

Purpose of the Study:

• To evaluate changes in stress distribution in a human maxillary canine after root canal therapy using finite element analysis (FEM).

Main Methods:

• Two 3D FEM models of a maxillary canine were created: one virgin, one endodontically treated.
• A 14.1 N force was applied to the palatal surface at a 45-degree angle.
• Stress distribution was analyzed in both models.

Main Results:

• Von Mises stress analysis showed a decrease after root canal therapy.
• The cementoenamel junction (CEJ) region exhibited the highest displacement.
• Endodontically treated teeth showed greater deflection than vital teeth.

Conclusions:

• Maximum stress and displacement consistently occurred in the cervical area.
• Reinforcement of the cervical region in endodontically treated teeth is recommended.