Fatigue and microgap behaviour of a three-unit implant-fixed dental prosthesis combining conventional and dynamic abutments

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Rocha Ferreira, J (Author) Other; Song, N (Author) Other; Machado, M (Author) Other; Machado, L (Author) Other; A Correia (Author) Other; Ana Reis (Author) FEUP

Journal

Title: Journal of Medical Engineering and Technology

Vol. 42

Pages: 397-405

ISSN: 0309-1902

Publisher: Taylor & Francis

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-00P-YJ0

DOI: 10.1080/03091902.2018.1520312

Abstract (EN): 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. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

Language: English

Type (Professor's evaluation): Scientific