All ETDs from UAB

Advisory Committee Chair

Daniel A Givan

Advisory Committee Members

Amjad Javed

Keith Kinderknecht

Nathaniel Lawson

Wen-Chou Wu

Document Type

Thesis

Date of Award

2021

Degree Name by School

Master of Science (MS) School of Dentistry

Abstract

Statement of Problem: When a situation of full-arch edentulism is observed, CAD-CAM designed prosthesis have improved properties in comparison to conventional fixed dentures. Long term longevity of the prosthesis includes not only strength of the framework, but also enhanced bonding strength between the framework and implant coping. Purpose: To investigate the bonding strength between different polymer materials used for a monolithic metal-free fixed hybrid denture luted to Ti-Base using the push-out strength test. Materials and Methods: The experimental design consists of 20 specimens for each group, with a total of 7 groups (total = 140). The materials used in the study include Poly(methylmethacrylate) (PMMA), Polyetheretherketone material (PEEK), Trilor epoxy resin, Polyetherketoneketone (PEKKTON) and Printable acrylic resin material – DENTCA. The cements used in the study include MDP adhesive monomer cement (Panavia V5 Dual Cure Kuraray) and self-adhesive resin cement (RelyX Unicem-2 self-adhesive 3M). In the experimental model proposed, the coping is represented by a Multi-Unit Titanium Coping (PXMUTC, Biohorizons), which is screwed to an abutment analog (Multi-unit Abutment Replica (PXMUAR, Biohorizons). Each of the samples are fabricated with the exact dimensions and will be luted using the above cements to the iv coping. After specimen fabrication is completed, each of the groups underwent thermocycling test, followed by the push out strength test and tested independently. Results: A one-way Analysis of Variance (ANOVA) was employed to determine if statistical differences existed in the data. Furthermore, the seven groups were directly compared to each other with post hoc testing to reveal individual statistical differences. Significant differences in bonding strength were observed among the groups. Conclusion: Within the limited scope of this in vitro study, potentially different clinical performance could result when bonding titanium copings into low modulus non-metal framework materials. Clinical implications:. It is important to not just test the strength of the materials, but also their bond strength with the luting cement. This criterion helps evaluate the long-term use and predictability of the prosthesis for clinical use.

Available for download on Friday, January 12, 2024

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