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Analysis of Enamel Wear Against Ceramic Restorations

NCT00223405 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 36

Last updated 2016-11-22

No results posted yet for this study

Summary

1. To characterize the microstructure (fracture toughness, particle size of ceramic, and inter-particle spacing) of three ceramic materials
2. To test the hypothesis that lower fracture toughness of glass and/or crystal phase in ceramics reduce wear damage of enamel.
3. To test the hypothesis that smaller sized crystals reduce wear damage of enamel.
4. To test the hypothesis that larger inter-particle spacing reduces wear damage of enamel.
5. To test the hypothesis that equivalent wear patterns exist in all directions between enamel versus enamel and ceramic versus enamel.
6. To test the hypothesis that bite force does not correlate with wear rates.
7. To test the hypothesis that salivary flow does not correlate with wear rates.
8. To test the hypothesis that a greater amount of wear is not associated with a loss in vertical dimension of occlusion.
9. To test the hypothesis that a greater amount of wear does not correlate with secondary cementum deposition as part of the passive eruption process.
10. To test the hypothesis that maximum wear occurs early and wear rates level off within the first two years.
11. To test the hypothesis that in vitro wear analysis does not correlate with in vivo wear measurements

Conditions

  • Tooth Wear

Interventions

DEVICE

crown placement

Sponsors & Collaborators

  • Ivoclar Vivadent AG

    collaborator INDUSTRY

  • University of Florida

    collaborator OTHER

  • The University of Texas Health Science Center at San Antonio

    lead OTHER

Principal Investigators

  • Josephine Esquivel-Upshaw, D.M.D.,M.S. · The University of Texas Health Science Center at San Antonio

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2003-04-30
Primary Completion
2009-01-31
Completion
2009-01-31

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00223405 on ClinicalTrials.gov