Mechanical Reliability Evaluation of an Oral Implant-Abutment System According to UNI EN ISO 14801 Fatigue Test Protocol

Marchetti, Enrico; Ratta, Stefano; Mummolo, Stefano; Tecco, Simona; Pecci, Raffaella; Bedini, Rossella; Marzo, Giuseppe

doi:10.1097/id.0000000000000453

Cited by 20 publications

(16 citation statements)

References 13 publications

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“…In our study we set the test methods based on ISO14801 protocol. This International Standard is most useful for comparing endosseous dental implants of different designs or sizes 18 , 19 . Several previous studies compared different implant designs applying this protocol in terms of stress and strain distribution, 20 , 21 torque evaluation, 13 , 22 and bending moment 23, 24, 25.…”

Section: Discussionmentioning

confidence: 99%

The compressive strength of implant-abutment complex with different connection designs

Huang

Pan

2019

Journal of Dental Sciences

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Background/purposeImplant-abutment connection is the component responsible for the transmitting of occlusal force from the crown down to the implant fixture. Different connection geometric structure will lead to different mechanical performance. The purpose of this study was to compare the stability of internal hex Implant -abutment connection with internal hex with Morse taper implant-abutment connection by testing their compressive strength.Materials and methodsThis was an in vitro study. The test group and the control group had 8 specimens separately. The test group was internal hex combined with Morse taper implant connection design, and the control group was internal hex connection design. Static force was applied to the specimens at a 30° angle until failure. The testing protocol was designed according to ISO14801 regulations. We compared the compressive strength of both groups.ResultsThe control group showed significantly higher compressive strength than the test group (p < 0.0001).ConclusionsFor the compressive strength of implant abutment complex, incorporating Morse taper design into internal hex connection failed to enhance its mechanical performance. According to this study, internal hex connection has higher compressive strength than internal hex connection combined with Morse taper design.

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Section: Discussionmentioning

confidence: 99%

The compressive strength of implant-abutment complex with different connection designs

Huang

Pan

2019

Journal of Dental Sciences

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“…Because of the foregoing, it could be said that, in order to decrease this type of complication, the diameter of the implant that will be used should be increased as much as possible, and the design of the implant-abutment junction should have greater resistance to different loads [21][22][23]. However, there is currently no specific design with proven effectiveness when compared to the other connections; therefore, a large number of configurations can be found in the market, which becomes a subject of great debate [24].…”

Section: Discussionmentioning

confidence: 99%

External Connection versus Internal Connection in Dental Implantology. A Mechanical in vitro Study

Fernández-Asián

Martínez-González²,

Torrés-Lagares

et al. 2019

Metals

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(1) Background: In today's dentistry, implantology has become a therapeutic resource of choice in certain clinical situations. The design of implants has evolved in several aspects since their inception. Dental implants were initially designed with an external hex connection, although due to force transmission and security in the adjustment of the prosthesis, later implants featured an internal hex connection. This study aims to analyse the mechanical properties of two types of implants (an internal connection and an external connection) from the same manufacturer and their different prosthetic components (union screw between implant and prosthetic abutment, and the abutment itself) when subjected to different types of load. (2) Materials and methods: Intraosseous dental implants of similar shape, design and size, although different in type of connection (external vs. internal), were studied. The specifications of the UNI EN ISO 14801 test standard were used, with all determinations being carried out three times. Finally, the dimensional characterisation of the samples analysed after the dynamic load study was carried out, and the values of both study groups were compared by means of the non-parametric Mann–Whitney U test to find statistically significant differences (p < 0.05). (3) Results: For the static characterisation test, we found between 610.9 N and 986.1 N for the external connection and between 1263.6 N and 1324 N for the internal connection (p = 0.011). All of the dynamic load tests were positive and there was no failure in any of the components studied. (4) Conclusions: After the analysis of the samples studied in vitro, satisfactory results were obtained, demonstrating that both connections can support considerable mechanical loads according to international standards (UNI EN ISO 14801).

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“…Thus, an estimated one million cycles of chewing sequences would be equivalent to one year of masticatory function [15]. In dentistry, several studies use 5 million cycles (around 5 years of masticatory function) as a reference to obtain the fatigue limit [16][17][18][19][20]. Given the complex nature of the masticatory function, such a simplistic mathematical correlation does not accurately conform to reality, but at least the number of 5 million is set as a reference point, especially for comparison among different systems.…”

Section: General Considerations: Load Fatigue S-n Curvesmentioning

confidence: 99%

“…In short, while the current ISO 14,801 standard offers improvements in the dynamic loading testing for dental implants, it nonetheless continues to suffer serious limitations in its effective application in the fatigue limit determination. The fact that most of the dental studies in this field do not satisfy the high number of specimens demanded by the normative only serves to confirm these inherent flaws [20,[33][34][35][36][37][38].…”

Section: Previous and Current Iso Standard: Comparative Analysismentioning

confidence: 99%

Optimized Planning and Evaluation of Dental Implant Fatigue Testing: A Specific Software Application

García-González

Blasón-González

García

et al. 2020

Biology

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Mechanical complications in implant-supported fixed dental prostheses are often related to implant and prosthetic design. Although the current ISO 14801 provides a framework for the evaluation of dental implant mechanical reliability, strict adherence to it may be difficult to achieve due to the large number of test specimens which it requires as well as the fact that it does not offer any probabilistic reference for determining the endurance limit. In order to address these issues, a new software program called ProFatigue is presented as a potentially powerful tool to optimize fatigue testing of implant-supported prostheses. The present work provides a brief description of some concepts such as load, fatigue and stress-number of cycles to failure curves (S-N curves), before subsequently describing the current regulatory situation. After analyzing the two most recent versions of the ISO recommendation (from 2008 and 2016), some limitations inherent to the experimental methods which they propose are highlighted. Finally, the main advantages and instructions for the correct implementation of the ProFatigue free software are given. This software will contribute to improving the performance of fatigue testing in a more accurate and optimized way, helping researchers to gain a better understanding of the behavior of dental implants in this type of mechanical test.

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Mechanical Reliability Evaluation of an Oral Implant-Abutment System According to UNI EN ISO 14801 Fatigue Test Protocol

Cited by 20 publications

References 13 publications

The compressive strength of implant-abutment complex with different connection designs

The compressive strength of implant-abutment complex with different connection designs

External Connection versus Internal Connection in Dental Implantology. A Mechanical in vitro Study

Optimized Planning and Evaluation of Dental Implant Fatigue Testing: A Specific Software Application

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