Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Dec 2;17(23):8988.
doi: 10.3390/ijerph17238988.

Influence of Connection Type and Platform Diameter on Titanium Dental Implants Fatigue: Non-Axial Loading Cyclic Test Analysis

Ana I Nicolas-Silvente  1 , Eugenio Velasco-Ortega  2 , Ivan Ortiz-Garcia  2 , Alvaro Jimenez-Guerra  2 , Loreto Monsalve-Guil  2 , Raul Ayuso-Montero  3 , Javier Gil  4 , Jose Lopez-Lopez  5
Affiliations

Influence of Connection Type and Platform Diameter on Titanium Dental Implants Fatigue: Non-Axial Loading Cyclic Test Analysis

Ana I Nicolas-Silvente et al. Int J Environ Res Public Health. .

Abstract

Two-pieces dental implants must provide stability of the implant-abutment-interface. The connection type and platform diameter could influence the biomechanical resistance and stress distribution. This study aims to evaluate the fatigue for different types of connections, external and internal, and different platform diameters. Three implant designs with the same length were used: (a) external hexagon/narrow platform; (b) internal double hexagon/narrow platform; (c) internal octagon/regular platform. A fatigue test was developed to establish the number of cycles needed before fracture. A 30º oblique load with a sinusoidal function of fatigue at a frequency of 15 Hz and 10% stress variation was applied to each system. The fatigue load limit (FLL) for design (a) was 190N, being the nominal-curvature-moment (NCM) = 1.045; FLL = 150 N, with a NCM = 0.825 for (b), and FLL = 325 N, with a NCM = 1.788 for (c). The platform diameter affects the FLL, obtaining lower FLL on a narrow platform. The connection type interferes with the implant walls' width, especially in narrow implants, making internal connections more unstable at this level. Long-term clinical studies to assess the restoration's success rate and survival are mandatory.

Keywords: connection type; dental implants; design; fatigue test; platform diameter.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Implant design of each experimental group.
Figure 2
Figure 2
Spherical member of the load application design details.
Figure 3
Figure 3
Load cell over the sample in the testing machine.
Figure 4
Figure 4
Cyclic load diagram for hexagon external connection obtained from the results of the test showed in Table 2.
Figure 5
Figure 5
Cyclic load diagram for double hexagon internal connection group obtained from the results of the test.
Figure 6
Figure 6
Cyclic load diagram for the octagonal internal connection group obtained from the results of the test.
Figure 7
Figure 7
SEM images at a magnification of ×500 and ×1500 showing the striations from the fractography.
See this image and copyright information in PMC

References

    1. Lin M.I., Shen Y.W., Huang H.L., Hsu J.T., Fuh L.J. A retrospective study of implant-abutment connections on crestal bone level. J. Dent. Res. 2013;92:202S–207S. doi: 10.1177/0022034513510322. - DOI - PMC - PubMed
    1. Yanase R.T., Preston J.D. Considerations for screw/cylinder prosthetic components. In: Fonseca R., Davis W.H., editors. Reconstructive and Preprosthetic Oral and Maxillofacial Surgery. 2nd ed. WB Saunders Co.; Philadelphia, PA, USA: 1995. p. 251.
    1. Pietrabissa R., Gionso L., Quaglini V., Di Martino E., Simion M. An in vitro study on compensation of mismatch of screw versus cement-retained implant supported fixed prostheses. Clin. Oral Implant. Res. 2000;11:448–457. doi: 10.1034/j.1600-0501.2000.011005448.x. - DOI - PubMed
    1. The Academy of Prosthodontics. The Academy of Prosthodontics Foundation . The Glossary of Prosthodontic Terms. 9th ed. Elsevier; St. Louis, MO, USA: 2017.
    1. Machado L.S., Bonfante E.A., Anchieta R.B., Yamaguchi S., Coelho P.G. Implant-abutment connection designs for anterior crowns: Reliability and failure modes. Implant Dent. 2013;22:540–545. doi: 10.1097/ID.0b013e31829f1f2d. - DOI - PubMed

Publication types