Influence of ridge type on mandibular distal extension removable partial denture.

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPellizzer, Eduardo Piza
dc.creatorFerraço, Renato
dc.creatorTonella, Bianca Piccolotto
dc.creatorOliveira, Bruno J de Cazaes
dc.creatorSouza, Fabiano Lopes
dc.creatorFalcón-Antenucci, Rosse M
dc.date2014-05-27T11:24:47Z
dc.date2016-10-25T18:29:04Z
dc.date2014-05-27T11:24:47Z
dc.date2016-10-25T18:29:04Z
dc.date2010-09-07
dc.date.accessioned2017-04-06T01:42:53Z
dc.date.available2017-04-06T01:42:53Z
dc.identifierActa odontológica latinoamericana : AOL, v. 23, n. 1, p. 68-73, 2010.
dc.identifier0326-4815
dc.identifierhttp://hdl.handle.net/11449/71870
dc.identifierhttp://acervodigital.unesp.br/handle/11449/71870
dc.identifier2-s2.0-77956192974
dc.identifierhttp://www.actaodontologicalat.com/archivo/v23n1/fulltext/articulo13.pdf
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/892797
dc.descriptionThe aim of this study was to use photoelastic models to analyze the distribution of stress caused by the incidence of loads on a mandibular distal extension removable partial denture, both on the abutment teeth and on differently shaped residual ridges: distal ascending, descending-ascending, horizontal and distal descending. The best type of retainer and location of the rest on the last abutment tooth were determined for the different types of ridge. Four models were made from photoelastic resin (PL-1 for the teeth and PL-2 for the alveolar ridge), one for each kind of ridge. For each model, 4 removable partial dentures (RPD) were made (16 RPD altogether): T-bar retainer and distal rest, T-bar retainer and mesial rest, circumferential retainer and distal rest, and circumferential retainer and mesial rest. The models were placed on a circular polariscope and a 100 N axial load (point load) was applied to premolars and molars of the RPD. The formation of photoelastic bands was photographed for qualitative analysis. Results showed that the horizontal ridge had better distribution of stress, while the distal descending ridge had greater concentration of stress. The circumferential retainer had greater areas of stress for all types of ridges except the horizontal ridge, where there was no influence related to retainer type. The distribution of stress was similar among the different types of ridges when the rest was mesial or distal to the last abutment tooth, except for the distal descending ridge, where there was greater concentration of stress when the rest was located distally to the last abutment tooth. Thus, it may be concluded that (1) the situation was least favorable for the distal descending ridge and most favorable for the horizontal ridge, (2) the T-bar retainer had more favorable stress distribution, except when the ridge was horizontal, in which case there was no influence in relation to the type of retainer, (3) the location of the rest showed similar behavior in all except the distal descending ridge.
dc.languageeng
dc.relationActa Odontológica Latinoamericana (AOL)
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectdenture
dc.subjectjaw
dc.subjectmandible
dc.subjectmechanical stress
dc.subjectprosthesis
dc.subjectAlveolar Process
dc.subjectDenture, Partial, Removable
dc.subjectMandible
dc.subjectProsthesis Design
dc.subjectStress, Mechanical
dc.titleInfluence of ridge type on mandibular distal extension removable partial denture.
dc.typeOtro


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