Structural optimization of dental restorations using the principle of adaptive growth - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Dental Materials Année : 2006

Structural optimization of dental restorations using the principle of adaptive growth

Résumé

Objectives. In a restored tooth, the stresses that occur at the tooth–restoration interface during loading could become large enough to fracture the toothand/or restoration and it has been estimated that 92% of fractured teeth have beenpreviously restored. The tooth preparation process for a dental restoration is aclassical optimization problem: tooth reduction must be minimized to preserve toothtissue whilst stress levels must be kept low to avoid fracture of the restored unit. Theobjective of the present study was to derive alternative optimized designs for asecond upper premolar cavity preparation by means of structural shape optimizationbased on the finite element method and biological adaptive growth.Methods. Three models of cavity preparations were investigated: an inlay design forpreparation of a premolar tooth, an undercut cavity design and an onlay preparation.Three restorative materials and several tooth/restoration contact conditions wereutilized to replicate the in vitro situation as closely as possible. The optimizationprocess was run for each cavity geometry.Results. Mathematical shape optimization based on biological adaptive growthprocess was successfully applied to tooth preparations for dental restorations.Significant reduction in stress levels at the tooth–restoration interface where bondingis imperfect was achieved using optimized cavity or restoration shapes. In the bestcase, the maximum stress value was reduced by more than 50%.Significance. Shape optimization techniques can provide an efficient and effectivemeans of reducing the stresses in restored teeth and hence has the potential ofprolonging their service lives. The technique can easily be adopted for optimizingother dental restorations.

Dates et versions

hal-02328745 , version 1 (23-10-2019)

Identifiants

Citer

Guillaume Couégnat, Siu L Fok, Jonathan E Cooper, Alison J.E. Qualtrough. Structural optimization of dental restorations using the principle of adaptive growth. Dental Materials, 2006, 22 (1), pp.3-12. ⟨10.1016/j.dental.2005.04.003⟩. ⟨hal-02328745⟩
32 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More