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dc.contributor.advisorWaddell, Neil
dc.contributor.authorAlrashed, Mohammed Hussin
dc.date.available2014-12-08T20:45:12Z
dc.date.copyright2014
dc.identifier.citationAlrashed, M. H. (2014). The influence of single and double implants on the strain distribution of mandibular metal-reinforced overdentures (Thesis, Master of Dental Technology). University of Otago. Retrieved from http://hdl.handle.net/10523/5366en
dc.identifier.urihttp://hdl.handle.net/10523/5366
dc.description.abstractObjective: To evaluate the influence of single and double implants on strain distribution of mandibular metal-reinforced overdentures and compare this to a mandibular metal-reinforced complete denture. Materials and Methods: Three different scenarios of the same case of an edentulous mandibular model were fabricated: one for a complete denture (CD), one for a single-implant overdenture (1-OD), and one for a two-implant overdenture (2-OD). Ball attachment implants were used for the models 1-OD and 2-OD. A 2-3 mm layer of silicone was created to simulate the mucosa on each model. Linear metal frameworks, following the curve of the arch, were cast in chrome-cobalt alloy from a round-hole chain-shaped preformed wax pattern strip connected to larger holes encompassing each implant matrix site. To measure strain distribution, strain gauges were attached to each denture on the buccal and lingual surfaces of the denture flanges and loaded using five loading scenarios in a universal testing machine. Results: Strain evaluation in the single-implant overdenture (1-OD) showed that when the molar teeth were vertically loaded, strain concentration occurred in the premolar area of the same quadrant. This concentration moved towards the midline area as the load moved towards the mesial passing through the premolars to the central incisors. In contrast, the strain evaluation in the two-implant overdenture (2-OD) showed that when the molar teeth were vertically loaded, strain concentration occurred in the midline area. This concentration partially disappeared as the load moved towards the mesial passing through the premolars to the central incisors. Conclusion: The current study supports the use of a metal framework as a reinforcement within a two-implant overdenture, but not in a single-implant overdenture. Further experimental investigations are needed to evaluate metal reinforcement within a single-implant overdenture with comparison between reinforced and non-reinforced models.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Otago
dc.rightsAll items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectOverdenture
dc.subjectimplants
dc.subjectstrain
dc.subjectdistribution
dc.titleThe influence of single and double implants on the strain distribution of mandibular metal-reinforced overdentures
dc.typeThesis
dc.date.updated2014-12-08T20:31:26Z
dc.language.rfc3066en
thesis.degree.disciplineOral Rehabilitation
thesis.degree.nameMaster of Dental Technology
thesis.degree.grantorUniversity of Otago
thesis.degree.levelMasters
otago.openaccessOpen
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