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

A Randomized Controlled Clinical Trial Comparing Cemented Versus Screw-retained Implant-supported Single Crowns With Customized Zirconia Abutments

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

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

Exclusion Criteria:

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