Introduction. Dental intrusion in patients whose support periodontium is deficient is a real and viable means for improving implantation, as the results of previous research are promising. Materials and methods. Catia V5R16 software and the attached Abaqus analysis software was used for investigating the behaviour of periodontal structures affected, to various extents, by periodontal disease. The mathematical models underwent repeated testings, using optimal (0.25 N) and super-optimal (1N, 2N, 3N and 5N) orthodontics forces, for assessing the response of the periodontal structures. Results and discussion. The values of σ ech show an exponential increase, as well as the magnitude of the applied force, irrespective of the presence of the periodontal disease (Fig. 8). The values of σ ech are the same for each level of applied force, whether the maxillary lateral incisor was affected or not. The values of the displacement recorded as a result of the application of intrusive forces on the maxillary lateral incisor, in cases when the periodontium was not affected or when it was affected to an extent of 33% by the periodontal disease, maintain a linear growth, along with the increase of the applied force, without any statistically significant differences as to the extent to which the periodontium was affected. Conclusions. The magnitude of the intrusive forces in the maxillary lateral incisor influences primarily the values of equivalent tensions, then those of orthodontic tooth movement, and lastly those of tensions in the direction of the applied force.
Keywords:- FEM
- intrusion
- maxillary lateral incisor
- PERIODONTAL DISEASE