Status:
COMPLETED
Analysis of Enamel Wear Against Ceramic Restorations
Lead Sponsor:
The University of Texas Health Science Center at San Antonio
Collaborating Sponsors:
Ivoclar Vivadent AG
University of Florida
Conditions:
Tooth Wear
Eligibility:
All Genders
18-65 years
Brief 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 g...
Detailed Description
A total of 36 teeth (1 crown per patient) needing crowns will be selected with the following acceptance criteria: 1. Subjects must be over 18 years of age with good overall health. No contraindicatio...
Eligibility Criteria
Inclusion
- Subjects needing a crown on a posterior tooth that is opposed by a natural tooth.
Exclusion
- Subjects must be over 18 years of age with good overall health. No contraindications to dental treatment must be present.
- Subjects must have overall good dental health with no active tooth decay (caries) present and no periodontal disease. Pocket depth on all remaining teeth must not be more than 4 mm.
- Subjects must have no existing temporomandibular disorder, (e.g. clicking, popping, pain on opening) or parafunctional habits (e.g. bruxism, clenching)
- Subjects must need a crown on either a second premolar, first molar or second molar on any arch. Abutment teeth must be restorable and have a crown root ratio of at least 1:1. Abutment teeth must have a complement of opposing non-restored or minimally restored natural teeth. Minimally restored means nothing beyond a Class II amalgam restoration. Opposing arch cannot be a full coverage restoration or a partial denture. Contralateral tooth must be preferably present.
- Subjects must exhibit good oral hygiene and compliance.
- Subjects must not have any existing condition that could limit the flow of saliva; e.g. saliva flow must be of normal quantity.
Key Trial Info
Start Date :
April 1 2003
Trial Type :
OBSERVATIONAL
Allocation :
ACTUAL
End Date :
January 1 2009
Estimated Enrollment :
36 Patients enrolled
Trial Details
Trial ID
NCT00223405
Start Date
April 1 2003
End Date
January 1 2009
Last Update
November 22 2016
Active Locations (1)
Enter a location and click search to find clinical trials sorted by distance.
1
University of Texas Health Science Center at San Antonio
San Antonio, Texas, United States, 78229-3900