Between Dec 19, 2024 and Jan 2, 2025, datasets can be submitted to DRUM but will not be processed until after the break. Staff will not be available to answer email during this period, and will not be able to provide DOIs until after Jan 2. If you are in need of a DOI during this period, consider Dryad or OpenICPSR. Submission responses to the UDC may also be delayed during this time.

Browsing by Subject "Designs"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    The Influence of Cutback Design on the Fracture Strength of Zirconia Crowns with Minimal Porcelain Veneering
    (2022-12) Rainville, Louis
    The purpose of this study is to compare designs of partially veneered 3Y-TZP zirconia crowns, quantify the fracture and ultimate compressive loads and define the failure patterns. A premolar was prepared with a 1mm reduction. The die was duplicated, 30 specimens were fabricated and divided in 3 groups (n=10): Group A – Control (PFZ), Group B – Experimental #1 (Veneer) and Group C – Experimental #2 (Window). Zirconia copings were fabricated with manually layered porcelain. The crowns were cemented onto the dies using resin cement and the specimens were tested under axial loading. The mean FL were 1538.40N (A), 2025.33N (B) and 2266.03N (C), and the mean UCL were 1554.42N (A), 2032.85N (B) and 2279.39N (C). 26/29 specimens underwent core fracture, and 3/29 specimens experienced adhesive veneer fracture. In conclusion, there were statistical differences between the control and the experimental groups, but not between the experimental groups.
  • Thumbnail Image
    Item
    Minutes: Senate Committee on Educational Policy: Classroom Advisory Subcommittee: March 9, 2004
    (University of Minnesota, 2004-03-09) University of Minnesota: Classroom Advisory Subcommittee