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Clinical Performance of 3-Unit FPDs

NCT00223431 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2005-09-22

No results posted yet for this study

Summary

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.

Conditions

  • Partial Edentulism

Interventions

DEVICE

all-ceramic fixed partial denture

Sponsors & Collaborators

  • Ivoclar Vivadent AG

    collaborator INDUSTRY

  • The University of Texas Health Science Center at San Antonio

    lead OTHER

Principal Investigators

  • Kenneth J Anusavice, PhD, DMD · University of Florida

Study Design

Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

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

Timeline & Regulatory

Start
1998-02-28
Completion
2004-05-31

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 NCT00223431 on ClinicalTrials.gov