Abstract

The principal objective of this research program is to develop optimized framework and marginal designs of porcelain-fused-to-metal (PFM) restorations which will demonstrate improved resistance to high temperature distortion (creep) and a reduction in transient and residual stress states due to thermal contraction incompatibility effect.
The specific aims of the project are to: 1. Calculate transient and residual stress distributions in simulated PFM restorations using finite element stress analysis. 2. Evaluate the high temperature creep resistance of PFM alloys. 3. Conduct thermal shock screening tests on PFM systems as an indicator of potential thermal contraction incompatibility problems. 4. Measure the marginal distortion of PFM crowns as a function of porcelain-metal system design and thermal history. 5. Examine and characterize PFM specimen fracture surfaces. 6. Determine the fracture resistance of PFM specimens with different coping and framework designs. Interfacial and fracture surface examination will employ SEM methods, energy dispersive x-ray analysis, electron diffraction techniques, and Auger, ESCA, and infrared spectroscopy analysis.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Project (R01)
Project #
5R01DE006672-03
Application #
3220187
Study Section
Oral Biology and Medicine Study Section (OBM)
Project Start
1983-03-01
Project End
1986-02-28
Budget Start
1985-03-01
Budget End
1986-02-28
Support Year
3
Fiscal Year
1985
Total Cost
Indirect Cost

  Institution

Name
University of Florida
Department
Type
Schools of Dentistry/Oral Hygn
DUNS #
073130411
City
Gainesville
State
FL
Country
United States
Zip Code
32611

  Publications

Esquivel-Upshaw, Josephine; Mehler, Alex; Clark, Arthur et al. (2015) Peri-implant complications for posterior endosteal implants. Clin Oral Implants Res 26:1390-6
Motta, Andréa Barreira; Pereira, Luiz Carlos; Duda, Fernando Pereira et al. (2014) Influence of substructure design and occlusal reduction on the stress distribution in metal ceramic complete crowns: 3D finite element analysis. J Prosthodont 23:381-9
Esquivel-Upshaw, Josephine F; Clark, Arthur E; Shuster, Jonathan J et al. (2014) Randomized clinical trial of implant-supported ceramic-ceramic and metal-ceramic fixed dental prostheses: preliminary results. J Prosthodont 23:73-82
Esquivel-Upshaw, Josephine F; Mehler, Alex; Clark, Arthur E et al. (2014) Fracture analysis of randomized implant-supported fixed dental prostheses. J Dent 42:1335-42
Anusavice, Kenneth J; Jadaan, Osama M; Esquivel-Upshaw, Josephine F (2013) Time-dependent fracture probability of bilayer, lithium-disilicate-based, glass-ceramic, molar crowns as a function of core/veneer thickness ratio and load orientation. Dent Mater 29:1132-8
Esquivel-Upshaw, Josephine; Rose, William; Oliveira, Erica et al. (2013) Randomized, controlled clinical trial of bilayer ceramic and metal-ceramic crown performance. J Prosthodont 22:166-73
Esquivel-Upshaw, J F; Dieng, F Y; Clark, A E et al. (2013) Surface degradation of dental ceramics as a function of environmental pH. J Dent Res 92:467-71
Anusavice, Kenneth J (2012) Standardizing failure, success, and survival decisions in clinical studies of ceramic and metal-ceramic fixed dental prostheses. Dent Mater 28:102-11
Esquivel-Upshaw, Josephine F; Rose Jr, William F; Barrett, Allyson A et al. (2012) Three years in vivo wear: core-ceramic, veneers, and enamel antagonists. Dent Mater 28:615-21
Anunmana, Chuchai; Anusavice, Kenneth J; Mecholsky Jr, John J (2010) Interfacial toughness of bilayer dental ceramics based on a short-bar, chevron-notch test. Dent Mater 26:111-7

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