title: Evaluation of an endosseous oral implant system according to UNI EN ISO 14801 fatigue test protocol.
abstract: OBJECTIVE
  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.
authors.affiliation: *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.
authors.forename: Enrico
authors.initials: E
authors.lastname: Marchetti
authors.forename: Stefano
authors.initials: S
authors.lastname: Ratta
authors.forename: Stefano
authors.initials: S
authors.lastname: Mummolo
authors.forename: Simona
authors.initials: S
authors.lastname: Tecco
authors.forename: Raffaella
authors.initials: R
authors.lastname: Pecci
authors.forename: Rossella
authors.initials: R
authors.lastname: Bedini
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Marzo
mesh_terms: D059605:Dental Implant-Abutment Design; D015921:Dental Implants / Q000592:standards*; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000592:standards*; D019544:Equipment Failure Analysis; D006801:Humans; D066298:In Vitro Techniques; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D014025:Titanium; D019415:Torque
chemical_list: D015921:Dental Implants; D014025:Titanium