Biomechanical behavior of extra-narrow implants after fatigue and pull-out tests

Autor: Karla Zancopé, Taís Alves dos Reis, Frederick Khalil Karam, Flávio Domingues das Neves
Rok vydání: 2019
Předmět:
Zdroj: The Journal of Prosthetic Dentistry. 122:54.e1-54.e6
ISSN: 0022-3913
DOI: 10.1016/j.prosdent.2019.04.005
Popis: Statement of problem Narrow implants have limited indications, and implant fracture may occur when these indications are not followed. Purpose The purpose of this in vitro study was to investigate the mechanical behavior of a 2.9-mm–diameter implant using a fatigue limit test and to investigate the Morse effect of 2 different Morse taper systems, 2.9-mm–diameter (FAC group) and 3.75-mm–diameter (CM group) implants, using a pull-out test. The null hypothesis was that the tensile strengths of the components for both systems would be similar. Material and methods The fatigue properties of 13 specimens under 6 loads were determined. The test was performed at 15 Hz and for 5×106 cycles. In the pull-out test, the specimens were divided into 2 groups (n=8), the FAC group (2.9-mm–diameter) and the CM group (3.75-mm–diameter). Statistical analysis for the pull-out test was performed with the Student t test (α=.05). Results Thirteen specimens underwent the fatigue test. Only 5 did not fail when subjected to the frequency and number of cycles examined. Three of the specimens did not fail under a load of 130 N. The pull-out test showed a significant difference between the FAC and CM groups (P Conclusions According to the fatigue test, the extra-narrow implant (Facility; Neodent) was compatible with the low masticatory effort regions, as indicated by the manufacturer. The better performance of the FAC group in the pull-out test may be due to its design, which promotes the pure Morse effect in the implant-abutment interface, and the angulation of its internal conical portion.
Databáze: OpenAIRE
Externí odkaz: