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.
 

Effect of a screw-access channel on the fracture resistance of monolithic zirconia crowns

Loading...
Thumbnail Image

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Effect of a screw-access channel on the fracture resistance of monolithic zirconia crowns

Published Date

2019-06

Publisher

Type

Thesis or Dissertation

Abstract

Purpose This in-vitro study was designed from a clinical case and investigated the effect of the presence of a screw assess channel, created either during the milling phase or following cementation, on the fracture strength of a monolithic zirconia cement-retained implant-supported fixed prosthesis (ISFP). Material & Methods A definitive cast from a clinical case restoring a mandibular right first molar implant was utilized to fabricate three different styles of monolithic zirconia cement-retained ISFP. Group 1 had no screw-access channel (CR), Group 2 had a screw-access channel milled in the green phase (MA), and Group 3 had a screw-access channel created by hand preparation after cementation (HA). With 3 groups and 5 samples in each group, there were a total of 15 monolithic zirconia crowns fabricated on custom abutments in preparation for testing. The maximum force required for crown fracture was measured using a universal testing machine. Results The mean loads to fracture from highest to lowest were: the milled screw-access channel group (MA), followed by the hand-made screw-access channel group (HA), and lastly by the cement-retained group without a screw-access channel (CR). One-way ANOVA analysis indicated the fracture strength of the MA was statistically significantly different than the cement-retained samples (P<0.05). No statistically significant differences were found between the milled screw-access channel and the access channel created by hand. Conclusion The presence of a screw-access channel, whether milled or prepared by hand, does not negatively affect the fracture strength of a monolithic zirconia ISFP.

Description

University of Minnesota M.S. thesis. 2019. Major: Dentistry. Advisor: Heather Conrad. 1 computer file (PDF); 53 pages.

Related to

Replaces

License

Series/Report Number

Funding information

Isbn identifier

Doi identifier

Previously Published Citation

Other identifiers

Suggested citation

Loeb, Mitchell. (2019). Effect of a screw-access channel on the fracture resistance of monolithic zirconia crowns. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/206155.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.