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To Compare Cemented Versus Screw-retained Implant-supported Single Crowns With Customized Zirconia Abutments

NCT01644630 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 34

Last updated 2020-11-06

No results posted yet for this study

Summary

The aim of this study is to test whether or not the use of screw-retained implant crowns on customized zirconia abutments results in biological, technical and esthetic outcomes similar to those obtained with cemented all-ceramic crowns on customized zirconia abutments, both made with a computer-aided design and manufacturing procedure (CAD/CAM).

The null-hypotheses is that marginal bone level change is equal at screw-retained and cemented crowns

Conditions

  • Implant-supported Single Crowns

Interventions

PROCEDURE

Cemented crowns

The final lithium disilicate crowns will be cemented with an adhesive cement after tightening the abutments with the torque indicated by the manufacturer and closing the screw access hole with white guttapercha. The abutment will be cleaned with ethanol. A retraction cord will be placed for cementation if indicated. The crown will be etched with hydrofluoric acid and subsequently silanized. A sufficient amount of cement will be filled in the crown without creating major excesses. When the crown is seated correctly, the cement will be light-cured for a few seconds to facilitate the removal of the now hard excess cement. \- Excess cement will be meticulously removed with a carbon scaler. The removal of all excess cement will be checked with an X-ray and by visual and tactile inspection.

PROCEDURE

Screw-retained crowns

The screw-retained crowns will be inserted and tightened with the torque indicated by the manufacturer. The screw access hole will to be closed with white guttapercha and a composite filling (Filtek, 3M ESPE).

Sponsors & Collaborators

  • University of Zurich

    lead OTHER

Principal Investigators

  • Daniel Thoma, Prof. Dr. · Clinic of Reconstructive Dentistry

Study Design

Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2012-07-27
Primary Completion
2019-11-11
Completion
2019-11-11

Countries

  • Switzerland

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 NCT01644630 on ClinicalTrials.gov