Retention strength of cobalt-chromium vs nickel-chromium titanium vs Cp titanium in a cast framework association of removable partial overdenture

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dc.contributor.authorSouza, José Everaldo de Aquino
dc.contributor.authorda Silva, Nelson Renato França Alves
dc.contributor.authorCoelho, Paulo Guilherme
dc.contributor.authorZavanelli, Adriana Cristina [UNESP]
dc.contributor.authorFerracioli, Renata Cristina Silveira Rodrigues
dc.contributor.authorZavanelli, Ricardo Alexandre
dc.contributor.institutionFO-UFG
dc.contributor.institutionNYUCD
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-27T11:25:52Z
dc.date.available2014-05-27T11:25:52Z
dc.date.issued2011-05-01
dc.description.abstractAim: There is little information considering the framework association between cast clasps and attachments. The aim of this study was to evaluate the retention strength of frameworks match circumferential clasps and extra resilient attachment cast in three different alloys (cobalt-chromium, nickel-chromium titanium and commercially pure titanium), using two undercut (0.25 and 0.75 mm) and considering different period of time (0, 1/2, 1, 2, 3, 4 and 5 years). Methods: Using two metallic matrices, representing a partially edentulous mandibular right hemiarch with the first molar crown, canine root and without premolars, 60 frameworks were fabricated. Three groups (n = 20) of each metal were cast and each group was divided into two subgroups (n = 10), corresponding the molar undercut of 0.25 mm and 0.75 mm. The nylon male was positioned at the matrix and attached to the acrylic resin of the prosthetic base. The samples were subjected to an insertion and removal test under artificial saliva environment. Results: The data were analyzed and compared with ANOVAs and Tukey's test at 95% of probability. The groups cast in cobaltchromium and nickel-chromium-titanium had the highest mean retention strength (5.58 N and 6.36 N respectively) without significant difference between them, but statistically different from the group cast in commercially pure titanium, which had the lowest mean retention strength in all the periods (3.46 N). The association frameworks using nickel-chromium-titanium and cobalt-chromium could be used with 0.25 mm and 0.75 mm of undercut, but the titanium samples seems to decrease the retention strength, mainly in the 0.75 mm undercut. The circumferential clasps cast in commercially pure titanium used in 0.75 mm undercuts have a potential risk of fractures, especially after the 2nd year of use. Conclusion: This in vitro study showed that the framework association between cast clasp and an extra resilient attachment are suitable to the three metals evaluated, but strongly suggest extra care with commercially pure titanium in undercut of 0.75 mm. Clinical significance: Frameworks fabricated in Cp Ti tend to decrease in retentive strength over time and have a potential risk of fracture in less than 0.75 mm of undercut.en
dc.description.affiliationDepartment of Prevention and Oral Rehabilitation FO-UFG, Goiás
dc.description.affiliationDepartment of Prosthodontics NYUCD, New York
dc.description.affiliationDepartment of Biomaterial and Biomimetics NYUCD, New York
dc.description.affiliationDepartment of Dental Materials and Prosthodontics FOA-UNESP, São Paulo
dc.description.affiliationDepartment of Dental Materials and Prosthodontics FORP-USP, São Paulo
dc.description.affiliationUnespDepartment of Dental Materials and Prosthodontics FOA-UNESP, São Paulo
dc.format.extent179-186
dc.identifierhttp://dx.doi.org/10.5005/jp-journals-10024-1031
dc.identifier.citationJournal of Contemporary Dental Practice, v. 12, n. 3, p. 179-186, 2011.
dc.identifier.doi10.5005/jp-journals-10024-1031
dc.identifier.file2-s2.0-84856147754.pdf
dc.identifier.issn1526-3711
dc.identifier.lattes8942804819076392
dc.identifier.orcid8942804819076392
dc.identifier.scopus2-s2.0-84856147754
dc.identifier.urihttp://hdl.handle.net/11449/72414
dc.language.isoeng
dc.relation.ispartofJournal of Contemporary Dental Practice
dc.relation.ispartofsjr0,263
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDental clasps
dc.subjectDenture precision attachment
dc.subjectRemovable partial denture
dc.subjectchromium derivative
dc.subjectcobalt
dc.subjectdental alloy
dc.subjecttitanium
dc.subjectanalysis of variance
dc.subjectcomparative study
dc.subjectdental procedure
dc.subjectdental surgery
dc.subjectdenture
dc.subjectinstrumentation
dc.subjectmaterials testing
dc.subjectnonparametric test
dc.subjectYoung modulus
dc.subjectAnalysis of Variance
dc.subjectChromium Alloys
dc.subjectCobalt
dc.subjectDental Alloys
dc.subjectDental Casting Technique
dc.subjectDental Clasps
dc.subjectDental Stress Analysis
dc.subjectDenture Design
dc.subjectDenture Precision Attachment
dc.subjectDenture Retention
dc.subjectDenture, Overlay
dc.subjectDenture, Partial, Removable
dc.subjectElastic Modulus
dc.subjectMaterials Testing
dc.subjectStatistics, Nonparametric
dc.subjectTitanium
dc.subjectTooth Preparation, Prosthodontic
dc.titleRetention strength of cobalt-chromium vs nickel-chromium titanium vs Cp titanium in a cast framework association of removable partial overdentureen
dc.typeArtigo
dcterms.licensehttp://www.thejcdp.com/pdfs/copyright_transfer_form.pdf
unesp.author.lattes8942804819076392[4]
unesp.author.orcid8942804819076392[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

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