Stress Distribution of Periodontal Ligament in Mandibular Second Molar with Different Distal Alveolar Bone Losses

To explore the effect of occlusal adjustment in mandibular second molar with different distal alveolar bone losses on the stress distribution of periodontal ligament, a left mandibular second molar was modelled using finite element analysis based on X-ray CBCT scanned images with different distal alveolar bone losses and different occlusal effects. The equivalent stress of periodontal ligament was analyzed to study the biomechanical properties of periodontal ligament in mandibular second molars with different occlusal areas and different distal alveolar bone losses. Results demonstrate that periodontal tissue plays an important role in supporting teeth, and the residual periodontal tissue is suggested to be retained as much as possible in clinical treatment.