Resorptive potential of impacted mandibular third molars: 3D simulation by finite element analysis

Objectives Previous studies have suggested a relationship between resorption in second molars and pressure from the eruptive force of the third molar. The aim of this study was to simulate functional forces in a mandible model by means of finite element analysis and then assess the biomechanical res...

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Bibliographic Details
Published in:Clinical oral investigations 2018-12, Vol.22 (9), p.3195-3203
Main Authors: Oenning, Anne Caroline, Freire, Alexandre Rodrigues, Rossi, Ana Cláudia, Prado, Felippe Bevilacqua, Caria, Paulo Henrique Ferreira, Correr-Sobrinho, Lourenço, Haiter-Neto, Francisco
Format: Article
Language:English
Subjects:
Biting
Compression
Computed tomography
Computer applications
Computer programs
Computer Simulation
Cone-Beam Computed Tomography
Dental roots
Dental Stress Analysis
Dentistry
Finite Element Analysis
Finite element method
Humans
Imaging, Three-Dimensional
Mandible
Mathematical models
Mechanical properties
Medicine
Molar, Third - diagnostic imaging
Molars
Original Article
Root resorption
Software
Teeth
Tooth Resorption - diagnostic imaging
Tooth, Impacted - diagnostic imaging
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Summary:Objectives Previous studies have suggested a relationship between resorption in second molars and pressure from the eruptive force of the third molar. The aim of this study was to simulate functional forces in a mandible model by means of finite element analysis and then assess the biomechanical response produced by impacted third molars on the roots of the second molar. Materials and methods A cone beam computed tomography scan presenting an impacted mandibular third molar was segmented (Mimics V17 software). The modeling process was performed using the reverse engineering technique provided by the Rhinoceros 3D 5.0 software. The third molar position was changed in order to produce different inclinations of the impacted tooth. Bite forces were simulated to evaluate total deformation, the equivalent von Mises stress, minimum principal stress on hard tissue, and equivalent elastic strain on soft tissue. Results Areas of high energy dissipation and compression stress were detected in the second molar root, independently of the inclination of the impacted third molar. In general, the horizontal position was the situation in which major stress and the amount of deformation occurred in the second and third molar regions. Conclusion Impacted third molars in close proximity with the adjacent tooth can generate areas of compression concentrated at the site of contact, which suggests an involvement of mechanical factors in the triggering of resorption lesions. Clinical relevance The results of these computational experiments contribute to the understanding of the triggering and progression of resorptive lesions in the adjacent second molar.
ISSN:1432-6981
1436-3771
DOI:10.1007/s00784-018-2403-4