NCT04713800

Two-unit Cantilever Implant Prostheses Made of Monolithic Zirconia or PFM

Randomized Controlled Clinical Trial of Two-unit Cantilever Implant Prostheses Made of Monolithic Zirconia on Titanium Base Abutments or Porcelain-fused to Metal on Gold Abutments

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 38 (estimated)
• Sponsor: University of Geneva, Switzerland · Academic / Other
• Sex: All
• Age: 22 Years
• Healthy volunteers: Accepted

Summary

The aim of is to compare the survival rate and technical outcomes of cantilever implant-supported fixed denture prosthetics (cFDPs) made either out of monolithic zirconia bonded to a titanium base in a digital workflow, or porcelain fused-to metal using a gold abutment in a conventional workflow. In addition, biological outcomes, wear patterns, PROMs and time efficiency will be recorded. The null hypothesis is: the reconstruction type does not influence the survival rate and technical outcomes of 2-unit implant-supported cFDP.

Conditions

• Jaw, Edentulous, Partially
• Missing Teeth

Interventions

Type	Name	Description
DEVICE	Monolithic zirconia screw retained implant-supported cantilever reconstruction supported by titanium base abutments, in a full digital workflow (ZR-TiB)	In group ZR-TiB the implant impressions will be taken using an intra-oral scanner and the respective scanbody. The restorations will be manufactured by means of CAD/CAM procedures using monolithic zirconia. For sufficient aesthetics, the zirconia restorations can be manually veneered with veneering ceramic only at the buccal surface, while the occlusal surface will remain monolithic and will be high-gloss polished. The zirconia restorations will be extra-orally cemented onto titanium base abutments (Straumann® Variobase® for crown, Straumann AG), correctly polished and delivered to the patient, by screw-retention onto the implant.
DEVICE	porcelain fused-to metal screw retained implant-supported cantilever reconstruction supported by a gold-abutment, in a conventional workflow (PFM-GA)	In group PFM-GA implant impression will be taken using a polyvinyl siloxane or polyether impression material in a conventional manner with the use of stock trays and corresponding impression copings. The framework will be manufactured by the lost wax-technique using a gold-abutment (Straumann® Gold abutment for crown, Straumann AG) and a gold-alloy. All metal frameworks will be manually veneered with veneering ceramic, polished and glazed, and delivered to the patient, by screw-retention onto the implant.

Timeline

• Start date: 2021-07-28
• Primary completion: 2027-07-01
• Completion: 2027-07-01
• First posted: 2021-01-19
• Last updated: 2022-11-23

Locations

1 site across 1 country: Switzerland