Compressive stress in periodontal ligament under orthodontic movements during periodontal breakdown.

Introduction: This analysis aimed to assess quantitatively and qualitatively the compressive stress (S3) in periodontal ligament in a gradual periodontal breakdown (0-8 mm) under orthodontic movements. Correlations between the applied forces, the level of bone resorption, the decrease of force magnitude, and S3 increase were also conducted.

Methods: On the basis of cone-beam computed tomography examinations (voxel size, 0.

Finite element analysis of the dental pulp under orthodontic forces.

Introduction: To evaluate the stress at the apical third of the pulp and neurovascular bundle (NVB) during 5 types of orthodontic movement at different levels of bone loss. Furthermore, correlations among bone loss, orthodontic appliances, and stress increase were assessed.

Methods: Based on cone-beam computed tomography datasets, 10 models of the mandibular second premolar were created.