Mechanical evaluation of four narrow-diameter implant systems

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dc.contributor.authorHirata, Ronaldo
dc.contributor.authorBonfante, Estevam A.
dc.contributor.authorMachado, Lucas S. [UNESP]
dc.contributor.authorTovar, Nick
dc.contributor.authorCoelho, Paulo G.
dc.contributor.institutionNew York University College of Dentistry
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionNew York University Abu Dhabi
dc.date.accessioned2022-04-28T19:00:18Z
dc.date.available2022-04-28T19:00:18Z
dc.date.issued2014-01-01
dc.description.abstractPurpose: This study aimed to evaluate the survival probability of four narrow-diameter implant systems when subjected to fatigue loading. Materials and Methods: Seventytwo narrow-diameter implants to be restored with single-unit crowns were divided into four groups (n = 18): Astra Tech (3.5-mm diameter), with a standard connection (ASC); BioHorizon (3.4-mm diameter), with a standard connection (BSC); Intra-Lock (3.4-mm diameter), with a standard multilobular connection (ISC); and Intra-Lock (3.4-diameter), with a modified square connection (IMC). The corresponding abutments were screwed onto the implants, and standardized metal crowns (maxillary central incisors) were cemented and subjected to step-stress accelerated life testing in water. Use-level probability Weibull curves and reliability for 100,000 cycles at 150 and 200 N (90% two-sided confidence intervals) were calculated. Polarized light and scanning electron microscopes were used to access the failure modes. Results: The calculated survival probability for 100,000 cycles at 150 N was approximately 93% in group ASC, 98% in group BSC, 94% in group ISC, and 99% in group IMC. At 200 N, the survival rate was estimated to be approximately < 0.1% for ASC, 77% for BSC, 34% for ISC, and 93% for IMC. Abutment screw fracture was the main failure mode for all groups. Conclusions: Although the probability of survival was not significantly different among systems at a load of 150 N, a significant decrease was observed at 200 N for all groups except IMC.en
dc.description.affiliationDepartment of Biomaterials and Biomimetics New York University College of Dentistry
dc.description.affiliationDepartment of Prosthodontics University of São Paulo Bauru College of Dentistry
dc.description.affiliationDepartment of Operative Dentistry São Paulo State University
dc.description.affiliationDirector of Material Analysis and Testing Laboratory New York University College of Dentistry
dc.description.affiliationDepartment of Periodontology and Implant Dentistry New York University College of Dentistry
dc.description.affiliationAffiliated Faculty Division of Engineering New York University Abu Dhabi
dc.description.affiliationUnespDepartment of Operative Dentistry São Paulo State University
dc.format.extent359-362
dc.identifierhttp://dx.doi.org/10.11607/ijp.3926
dc.identifier.citationInternational Journal of Prosthodontics, v. 27, n. 4, p. 359-362, 2014.
dc.identifier.doi10.11607/ijp.3926
dc.identifier.issn0893-2174
dc.identifier.scopus2-s2.0-84906549683
dc.identifier.urihttp://hdl.handle.net/11449/220207
dc.language.isoeng
dc.relation.ispartofInternational Journal of Prosthodontics
dc.sourceScopus
dc.titleMechanical evaluation of four narrow-diameter implant systemsen
dc.typeArtigo

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