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Article

Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis

  • Authors:
    • Xu Yan
    • Xinwen Zhang
    • Weichao Chi
    • Hongjun Ai
    • Lin Wu
  • View Affiliations / Copyright

    Affiliations: Department of Prosthodontics, School of Stomatology, China Medical University, Shenyang, Liaoning 110001, P.R. China, Center of Implant Dentistry, School of Stomatology, China Medical University, Shenyang, Liaoning 110001, P.R. China, School of Astronautics, Harbin Institute of Technology, Harbin, Heilongjiang 150001, P.R. China
  • Pages: 868-876
    |
    Published online on: January 22, 2015
       https://doi.org/10.3892/etm.2015.2205
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Abstract

The aim of the present study was to evaluate the effect of the association between the implant apex and the sinus floor in posterior maxilla dental implantation by means of three‑dimensional (3D) finite element (FE) analysis. Ten 3D FE models of a posterior maxillary region with a sinus membrane and different heights of alveolar ridge with different thicknesses of sinus floor cortical bone were constructed according to anatomical data of the sinus area. Six models were constructed with the same thickness of crestal cortical bone and a 1‑mm thick sinus floor cortical bone, but differing heights of alveolar ridge (between 10 and 14 mm). The four models of the second group were similar (11‑mm‑high alveolar ridge and 1‑mm‑thick crestal cortical bone) but with a changing thickness of sinus floor cortical bone (between 0.5 and 2.0 mm). The standard implant model based on the Nobel Biocare® implant system was created by computer‑aided design (CAD) software and assembled into the models. The materials were assumed to be isotropic and linearly elastic. An inclined force of 129 N was applied. The maximum von Mises stress, stress distribution, implant displacement and resonance frequencies were calculated using CAD software. The von Mises stress was concentrated on the surface of the crestal cortical bone around the implant neck with the exception of that for the bicortical implantation. For immediate loading, when the implant apex broke into or through the sinus cortical bone, the maximum displacements of the implant, particularly at the implant apex, were smaller than those in the other groups. With increasing depth of the implant apex in the sinus floor cortical bone, the maximum displacements decreased and the implant axial resonance frequencies presented a linear upward tendency, but buccolingual resonance frequencies were hardly affected. This FE study on the association between implant apex and sinus floor showed that having the implant apex in contact with, piercing or breaking through the sinus floor cortical bone benefited the implant stability, particularly for immediate loading.
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Copy and paste a formatted citation
Spandidos Publications style
Yan X, Zhang X, Chi W, Ai H and Wu L: Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis. Exp Ther Med 9: 868-876, 2015.
APA
Yan, X., Zhang, X., Chi, W., Ai, H., & Wu, L. (2015). Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis. Experimental and Therapeutic Medicine, 9, 868-876. https://doi.org/10.3892/etm.2015.2205
MLA
Yan, X., Zhang, X., Chi, W., Ai, H., Wu, L."Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis". Experimental and Therapeutic Medicine 9.3 (2015): 868-876.
Chicago
Yan, X., Zhang, X., Chi, W., Ai, H., Wu, L."Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis". Experimental and Therapeutic Medicine 9, no. 3 (2015): 868-876. https://doi.org/10.3892/etm.2015.2205
Copy and paste a formatted citation
x
Spandidos Publications style
Yan X, Zhang X, Chi W, Ai H and Wu L: Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis. Exp Ther Med 9: 868-876, 2015.
APA
Yan, X., Zhang, X., Chi, W., Ai, H., & Wu, L. (2015). Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis. Experimental and Therapeutic Medicine, 9, 868-876. https://doi.org/10.3892/etm.2015.2205
MLA
Yan, X., Zhang, X., Chi, W., Ai, H., Wu, L."Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis". Experimental and Therapeutic Medicine 9.3 (2015): 868-876.
Chicago
Yan, X., Zhang, X., Chi, W., Ai, H., Wu, L."Association between implant apex and sinus floor in posterior maxilla dental implantation: A three-dimensional finite element analysis". Experimental and Therapeutic Medicine 9, no. 3 (2015): 868-876. https://doi.org/10.3892/etm.2015.2205
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