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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
Evaluation of an endosseous oral implant system according to UNI EN ISO 14801 fatigue test protocol
Enrico Marchetti1, Stefano Ratta, Stefano Mummolo
1*Assistant Professor, Department of MeSVA, University of L'Aquila, L'Aquila, Italy. †Assistant Professor, Department of MeSVA, University of L'Aquila, L'Aquila, Italy. ‡Assistant Professor, Department of MeSVA, University of L'Aquila, L'Aquila, Italy. §Researcher, University Vita-Salute San Raffaele, Milano, Italy. ‖Researcher, Technologies and Health Department, Italian National Institute of Health, Rome, Italy. ¶First Researcher, Technologies and Health Department, Italian National Institute of Health, Rome, Italy. #Professor, Department of MeSVA, University of L'Aquila, L'Aquila, Italy.
Purpose:
The aim of this in vitro study was to evaluate the maximum fracture load and the mechanical performance to cyclic fatigue stress of a dental implant system.
Methods:
An experimental study according to the international standards (UNI EN ISO 14801: 2008) was carried out using 15 implants (3.80 mm of diameter and 13 mm of length) with applied straight titanium abutment tightened to 30 N. Five samples were subjected to compression stress at break. Based on the mean fracture load value obtained in this test, the levels of dynamic loading range were set that were carried on at a frequency of 15 Hz for 5 × 10 cycles.
Results:
The compression stress at break mean value of the tested implants was 499.40 N (SD ±50.1 N). In the mechanical fatigue stress test, the fatigue limit for 5 × 10 load cycles for all tested samples was 250 N.
Conclusions:
The evaluated implant system proved to withstand considerable mechanical loads under the "worst-case" loading situation performed according to UNI EN ISO 14801 standard. The reliability of this test protocol makes it suitable to be accomplished for understanding and comparing mechanical properties of other implant systems.
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