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

Not Applicable

Completed

• Conditions: Implant-supported Single Crowns
• Interventions: Procedure: Screw-retained crowns; Procedure: Cemented crowns

• Registration Number: NCT01644630
• Lead Sponsor: University of Zurich

Brief 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

Detailed Description

Not available

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study First Submitted: 2012-07-09
• Study First Submitted QC: 2012-07-16
• Study First Posted: 2012-07-19
• Study Start: 2012-07-27
• Primary Completion: 2019-11-11
• Study Completion: 2019-11-11
• Status Verified: 2020-11
• Last Update Submitted: 2020-11-04
• Last Update Posted: 2020-11-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 34

Inclusion Criteria

• Single-tooth Straumann Bone Level in the anterior maxilla or mandible
• At least one adjacent natural tooth present
• Implant position enabling both screw-retained and cemented crown
• Informed consent signed

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Exclusion Criteria

• Smoking more than 15 cigarettes a day
• Poor oral hygiene (Plaque index over 30%)
• Pregnancy at the date of inclusion

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Screw-retained single crown	Screw-retained crowns	Screw-retained single crown: zirconia abutment (Straumann Cares abutment), directly veneered with veneering ceramic
Cemented single crowns	Cemented crowns	Cemented single crown: zirconia abutment (Straumann Cares abutment) with an all-ceramic lithium disilicate crown

Primary Outcome Measures

Name	Time	Method
Marginal bone level	5 years	The bone level represents an indicator of the osseointegration and biological success of the implant.

Secondary Outcome Measures

Name	Time	Method
Biological, technical and esthetic outcome	up to 5 years	rate of technical complications after 1, 3 and 5 years

Trial Locations

Locations (1)

Clinic of Reconstructive Dentistry; 🇨🇭 Zurich, Switzerland