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TitleFatigue and microgap behaviour of a three-unit implant-fixed dental prosthesis combining conventional and dynamic abutments
Author(s)Ferreira, José Rocha
Song, Nannan
Machado, Margarida
Machado, Luís Meira
Correia, André
Reis, Ana
KeywordsDynamic abutments
Fatigue test
Issue date2018
PublisherInforma Healthcare
JournalJournal of Medical Engineering and Technology
CitationJosé Rocha Ferreira, Nannan Song, Margarida Machado, Luís Machado, André Correia & Ana Reis (2018) Fatigue and microgap behaviour of a three-unit implant-fixed dental prosthesis combining conventional and dynamic abutments, Journal of Medical Engineering & Technology, 42:5, 397-405, DOI: 10.1080/03091902.2018.1520312
Abstract(s)This is an in vitro study composed by a fatigue test followed by an optical microscopy analysis. Dynamic abutments concept, recently introduced on screw-retained implant dental prosthesis, consists on the screw channel customisation according to the individual needs of each rehabilitation. Geometry and tightening torque differences advise the assessment of their mechanical performance. Clarify whether the combination of dynamic and conventional abutments in a three-unit implant-fixed prosthesis has detrimental effects either on the mechanical performance under cyclic loading or on the implant-abutment microgap dimensions. The fatigue test was performed in agreement with the ISO standard 14801. Then on the samples that resisted 5 million cycles, the implant-abutment microgap was measured on dynamic and conventional abutments using optical microscopy. Two unloaded samples were used as control group. The samples supported a load of 1050 N. The implant-abutment microgap measurement did not show statistically significant differences (p=.086) between loaded and unloaded groups, but the loaded conventional abutments showed a significant lower implant-abutment microgap (p=.05) than the loaded dynamic abutments. The combination of conventional and dynamic abutments do not seem to produce a decrease in fatigue resistance to a level below the mastication forces or an increase in the joint dimensions.
Publisher version
AccessOpen access
Appears in Collections:CMAT - Artigos em revistas com arbitragem / Papers in peer review journals

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