Abstract
Abfractions are wedge-shaped cervical lesions which appear due to flexure of enamel and/or dentin at some location distant from the actual point of loading. The tensions may reach the fatigue limit and lead to rupture of the amelar and dentinal materials. We used the finite element method (FEM) to investigate the effect of high occlusal forces on the dental and restorative materials placed in the cervical buccal region. We developed two 3D models of maxillary premolars in order to compare the stress profiles in the buccal cervical regions under functional (20 N) and parafunctional (800 N) occlusal loads. The discretization of the tooth morphology resulted in 18889 elements and 31425 nodes. The models was subjected to occlusal analysis. The equivalent tensions (Pa) found in the buccal cervical region of the premolars at the application of parafunctional occlusal loads (800 N) are high enough to induce the breakdown of dentinal and compomer materials (over 2.41E+08 Pa). Cervical stresses induced by masticatory forces (20 N) have much lower values, which are not harmful for the dental materials. In conclusion, occlusal overload can cause damage to both the dentinal and compomer restorative materials placed in the cervical buccal region of teeth.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.