Machined and plastic copings in three-element prostheses with different types of implant-abutment joints: a strain gauge comparative analysis.
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New glass polyalkenoate temporary cement for cement-retained implant restoration: evaluation of elevation and retentive strength.
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The purpose of this study was to evaluate four luting agents for cement-retained implant restorations in two aspects: post-cementation elevation of the superstructure and the retentive strength before and after thermocycling and mechanical cycling. The four evaluated luting agents were: new glass polyalkenoate hard-type (GH) and soft-type (GS) cements, polycarboxylate hard-type (HH) and soft-type (HS) cements. Elevation and retentive strength were measured using a CCD laser displacement sensor and a universal testing machine respectively. Elevation increased in this order: GH, GS, HH, and HS. Thermal and mechanical stresses significantly decreased retentive strength, and the mean values exhibited by GH were significantly higher than the other luting agents. The novel glass polyalkenoate cements (hard- and soft-type) experimentally prepared in the present study augured well as luting agents by virtue of their reduced film thickness and their excellent post-cementation retention and elevation. (+info)
Modified measuring compass as an intraoral paralleling device.
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Dental students' ability to evaluate themselves in fixed prosthodontics.
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Self-evaluation is an essential skill for dental professionals for lifelong learning and improvement through the course of their careers. Students taking a preclinical fixed prosthodontics course were studied. The students were asked to assign themselves a grade upon completion of their timed preparation examination (teeth preparations and provisional restorations), and these were compared with grades given by the faculty. The poorer performing students tended to be less critical with their examination and to overrate their performance whereas the higher performing students were more critical of themselves and underrated their performance. (+info)
The influence of coronoradicular amputation on the shape of the subsequent prosthetic restoration.
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The patient's desire to preserve their natural dentition is increasing constantly; therefore, nowadays dentists have to treat teeth that once would have been extracted. Using endodontics, periodontics and restorative dentistry techniques, we can maintain these teeth on the arches in whole or in part and they can be used as independent units of mastication or as abutments in simple fixed bridges. This article describes a procedure of modifying the form and shape of the prosthetic restoration of a maxillar molar after a crown and root amputation. (+info)
Needs and demands of prosthetic treatment among two groups of individuals.
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