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. 2020 Oct-Dec;11(4):336-341.
doi: 10.4103/ccd.ccd_366_19. Epub 2020 Dec 20.

Influence of Implant Dimensions in the Resorbed and Bone Augmented Mandible: A Finite Element Study

Doriana Agop Forna  1 , Norina Consuela Forna  2 , Sînziana Anca Butnaru Moldoveanu  3
Affiliations

Influence of Implant Dimensions in the Resorbed and Bone Augmented Mandible: A Finite Element Study

Doriana Agop Forna et al. Contemp Clin Dent. 2020 Oct-Dec.

Abstract

Aims: The scope of this study was to analyze the influence of clinically feasible implant diameter and length on the stress transmitted to the peri-implant bone in the case of a resorbed and bone augmented mandible through finite element analysis.

Settings and design: The study was carried out in silico.

Subjects and methods: Resorbed and bone-augmented 3D models were derived from in vivo cone-beam computed tomography scans of the same patient. Corresponding implant systems were modeled with the diameter ranging from 3.3 to 6 mm and length ranging from 5 to 13 mm, and masticatory loads were applied on the abutment surface.

Statistical analysis used: None.

Results: In the bone augmented ridge, maximum stress values in the peri-implant region drastically decreased only when using implants of a diameter of 5 mm and 6 mm. Implants up to 4 mm in diameter led to comparable stress values with the ones obtained in the resorbed ridge, when using the larger implants. The increase of length reduced stress in the resorbed mandible, whereas in the bone augmented model, it led to small variations only in implants up to 4 mm in diameter.

Conclusions: It was concluded that bone augmentation provides the optimal framework for clinicians to use larger implants, which, in turn, reduces stress in the peri-implant region. Diameter and length play an equally important role in decreasing stress. Implant dimensions should be carefully considered with ridge geometry.

Keywords: Bone augmentation; bone resorption; finite element analysis; implant dimensions; peri-implant stress.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
(a) Image depicts a cone-beam computed tomography scan image made before the bone augmentation and revealed the initial measurements of the mandibular bone. (b) The image depicts a second cone-beam computed tomography scan image made after the bone augmentation which revealed the obtained measurements of mandibular bone
Figure 2
Figure 2
Modeled 3D FE of the resorbed mandibular section (a) and bone augmented mandibular section (b)
Figure 3
Figure 3
3D model of the mandibular bone section with loads applied
Figure 4
Figure 4
von Mises stress in resorbed and bone augmented mandible bone when using various implant dimensions
Figure 5
Figure 5
Stress distribution at crestal bone level in the resorbed and bone augmented mandible models when using various implant dimensions
See this image and copyright information in PMC

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