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

Author(s)

Oenning, Anne Caroline ^[1] ; Freire, Alexandre Rodrigues ^[2] ; Rossi, Ana Claudia ^[2] ; Prado, Felippe Bevilacqua ^[2] ; Ferreira Caria, Paulo Henrique ^[2] ; Correr-Sobrinho, Lourenco ^[3] ; Haiter-Neto, Francisco ^[1]

Affiliation

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, Div Oral Radiol, Dept Oral Diag, Piracicaba - Brazil

^[2] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Morphol, Div Anat, Piracicaba - Brazil

^[3] Univ Estadual Campinas, Piracicaba Dent Sch, Div Dent Mat, Dept Restorat Dent, Piracicaba - Brazil

• Document type: Journal article
• Source: CLINICAL ORAL INVESTIGATIONS; v. 22, n. 9, p. 3195-3203, DEC 2018.
• Web of Science Citations: 1

Abstract

ObjectivesPrevious 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 methodsA 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.ResultsAreas 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.ConclusionImpacted 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 relevanceThe results of these computational experiments contribute to the understanding of the triggering and progression of resorptive lesions in the adjacent second molar. (AU)

• FAPESP's process: 13/12762-2 - ASSESSMENT OF DENTAL RESORPTION OF THE SECOND MOLARS ASSOCIATED WITH THIRD MOLAR IMPACTION USING FINITE ELEMENT ANALYSIS
• Grantee: Anne Caroline Costa Oenning
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/14409-0 - Bone remodeling and biomechanical analysis of maxillary alveolar bone in rats with masticatory overload
• Grantee: Ana Cláudia Rossi
• Support type: Regular Research Grants