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. 2021 Dec 1;13(12):e1167-e1173.
doi: 10.4317/jced.58930. eCollection 2021 Dec.

Implant insertion angle and depth: Peri-implant bone stress analysis by the finite element method

Fabiano Rito-Macedo  1 , Millena Barroso-Oliveira  2 , Luiz-Renato Paranhos  3 , Joelson Rodrigues-Brum  4 , Igor-Felipe Pereira-Lima  5 , Fabiana-Mantovani Gomes-França  6 , Rui-Barbosa de Brito-Junior  6
Affiliations

Implant insertion angle and depth: Peri-implant bone stress analysis by the finite element method

Fabiano Rito-Macedo et al. J Clin Exp Dent. .

Abstract

Background: The study aimed to assess the influence of different implant insertion angles and depths on the stresses produced on the surface of peri-implant bone tissue under axial and oblique loading.

Material and methods: The entire study followed the recommendations of the Checklist for Reporting In-vitro Studies (CRIS). The implant was placed in the region of element 36, according to the following models: M1 (0 mm / 0°); M2 (0 mm / 17°); M3 (0 mm / 30°); M4 (2 mm / 0°); M5 (2 mm / 17°); M6 (2 mm / 30°). The models were subjected to loading, with intensity of 100 N. The stress assessment followed the Mohr-Coulomb criterion and qualitative and quantitative analyses were performed.

Results: Angled implants and installed below the bone crest produced the highest stresses on the cortical bone, and the axial load presented the highest stress peaks on the buccal side of implants perpendicular to the bone crest. Regardless of the type of load (axial or oblique), inclined implants presented the highest stress peaks on the lingual side of the cortical bone.

Conclusions: Implants installed perpendicular to and with a prosthetic platform at bone crest height provided the lowest stresses to peri-implant bone tissue under both axial and oblique loading. Key words:Finite element analysis, dental implants, axial loading, biomechanical phenomena.

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Conflict of interest statement

Conflicts of interest None.

Figures

Figure 1
Figure 1
Models analyzed. Buccal (B), buccal semitransparent (BS), mesial (M), and mesial sectional (MS) views.
Figure 2
Figure 2
Examples of meshes created. Mandible (A), crown (B), bone structure (C), implant and abutment (D), and all structures in a sectional mesial view (E).
Figure 3
Figure 3
Formula.
Figure 4
Figure 4
External and sectional view of results on the peri-implant bone under axial loading. BO: buccal occlusal, LO: lingual occlusal, and DS: distal in sectional view. Because it is a sectional view, the distal view shows the mesial portion.
Figure 5
Figure 5
External and sectional view of results on the peri-implant bone under oblique loading. BO: buccal occlusal, LO: lingual occlusal, and DS: distal in sectional view. Because it is a sectional view, the distal view shows the mesial portion.
See this image and copyright information in PMC

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