Partial Edentulism Clinical Trial
Official title:
Clinical Performance of Three-Unit Fixed Partial Dentures (FPDs) Made From a Hot-Pressed Ceramic (Five-Year Study)
Objectives: The purpose of this research was to determine the clinical success rate of a
lithia-disilicate-based core ceramic (Ivoclar, Vivadent Corp.) for use in posterior fixed
partial dentures (FPDs) as a function of bite force, cement type, connector height, and
connector width.
Methods: Thirty ceramic FPD core frameworks were prepared using a hot-pressing technique and
a lithia-disilicate-based core ceramic. The maximum clenching force was measured for each
patient prior to tooth preparation. Connector heights and widths were measured for each FPD.
Patients were recalled yearly after cementation for two years and evaluated using eleven
clinical criteria. All FPDs were examined by two independent clinicians and rankings for
each criterion were made from 1 to 4 with 4 = excellent and 1 = unacceptable.
The aims of this research were:
1. To test the hypotheses that three-unit fixed partial dentures (FPDs) of a high-strength
core ceramic will exhibit good-to-excellent clinical performance (based on 11
evaluative criteria) and that they will adequately resist fracture in posterior
situations (excluding third molars) if fabricated with the minimal connector size (4 mm
x 4 mm).
2. To test the hypothesis that a reinforced glass ionomer cement (ProTec CEM, Ivoclar,
Vivadent), when used to cement core ceramic crowns in posterior FPDs, will be
associated with significantly less marginal quality, but similar fracture resistance of
the ceramic crowns compared with the marginal quality associated with a dual cure resin
cement (Variolink® II, Ivoclar Vivadent AG, Schaan, Liechtenstein).
3. To test the hypothesis that there is no significant difference in tooth sensitivity
associated with FPDs cemented with the glass ionomer cement and dual-cure resin cement.
Status | Completed |
Enrollment | 30 |
Est. completion date | May 2004 |
Est. primary completion date | |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 18 Years to 65 Years |
Eligibility |
Inclusion Criteria: - missing posterior tooth in a quadrant (first premolars through second molars) that could be restored with a 3-unit FPD - periodontal pockets of less than 4 mm for each abutment with no periodontal disease - vital abutment teeth - crown root ratio of at least 1:1. Exclusion Criteria: - individuals with medical contraindications to dental treatment - parafunctional habits - inability to ensure residence in the area for the next five years |
Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
United States | University of Florida College of Dentistry | Gainesville | Florida |
Lead Sponsor | Collaborator |
---|---|
The University of Texas Health Science Center at San Antonio | Ivoclar Vivadent AG |
United States,
Esquivel-Upshaw JF, Anusavice KJ, Young H, Jones J, Gibbs C. Clinical performance of a lithia disilicate-based core ceramic for three-unit posterior FPDs. Int J Prosthodont. 2004 Jul-Aug;17(4):469-75. — View Citation
Gibbs CH, Anusavice KJ, Young HM, Jones JS, Esquivel-Upshaw JF. Maximum clenching force of patients with moderate loss of posterior tooth support: a pilot study. J Prosthet Dent. 2002 Nov;88(5):498-502. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | clinical performance | |||
Primary | improved esthetics | |||
Primary | improved occlusal function of a lithia disilicate based core ceramic. Performance was measured yearly for 4 years. | |||
Secondary | wear of opposing enamel |
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