Mechanical responses to orthodontic loading: A 3-dimensional finite element multi-tooth model

Three-dimensional FEM analysis of stress distribution in dynamic maxillary canine movement

“…In translation movement, on the other hand, the stress distributed more even throughout the PDL and the root (Figure 3). These results are in agreement with the studies by Rudolph et al [9], and Field et al [23]. Chan et al [17] and Darendeliler et al [36] demonstrated that root resorption might occurs more frequently in high-pressure zones after 28 days of force application.…”

“…An optimal orthodontic force, which is decided by the pattern of stress distribution in periodontal tissue, can make the tooth movement process smoothly with minor irreversible tissue damage. On the contrary, not only will the tooth stop moving normally, but also negative consequences will occur if the orthodontist knows little about the mechanical responses for different types of tooth movement [23]. These always lead to decreased tooth function and disappointing esthetic outcome.…”

Truth or consequences: the potential implications of short-term cosmetic orthodontics for general dental practitioners

“…17 That tipping tooth movements predominate in short-term orthodontics is acknowledged 1 and this type of tooth movement results in maximum stresses and strains in the periodontal ligament (PDL) at the root apex and the alveolar crest of the teeth; so much so that in some instances the hydrostatic stresses exceed the body's systolic pressure, which can lead to the induction of PDL necrosis and a reactionary osteoclastic response. 18 When orthodontic forces applied to teeth are not evenly spread over the root surface (as in the case of tipping), the forces can be focal and greater around certain regions. 16 As such, orthodontic tooth movement has been highlighted as a possible factor in the development of external cervical resorption (ECR), where excessive forces in the cervical region (as may occur inadvertently in inexperienced hands) may induce necrosis and inflammation adjacent to dentine, stimulating odontoclastic differentiation followed by resorption.…”

Finite element analysis of newly introduced plates for mandibular condyle neck fracture treatment by open reduction and rigid fixation

“…8,11,[13][14][15] Cancellous bone Youngs modulus was used as 1.4 GPa. The width of the fracture line after open reduction was established at 0.32 mm.…”