Two-unit Cantilever Implant Prostheses Made of Monolithic Zirconia or PFM
NCT ID: NCT04713800
Last Updated: 2022-11-23
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
38 participants
INTERVENTIONAL
2021-07-28
2027-07-31
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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ZR-TiB
Monolithic zirconia screw retained implant-supported cantilever reconstruction supported by titanium base abutments, in a full digital workflow (ZR)
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.
PFM-GA
Porcelain fused-to metal screw retained implant-supported cantilever reconstruction supported by a gold-abutment, in a conventional workflow (PFM)
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.
Interventions
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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.
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.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* No general medical condition which represents a contraindication to implant treatment
* Good oral hygiene (PII ≤ 20%), and healthy periodontal tissues (BOP≤ 20%)
* Two adjacent-teeth gap in posterior maxilla or mandible arch (first premolar, second premolar, first molar, second molar) with an osseointegrated regular or wide-diameter bone-level implant in a prosthetically correct position to allow occlusal screw-retention. Free-end edentulous gaps can also be included
* Presence of antagonist occlusal units
Exclusion Criteria
* Patients with inadequate oral hygiene or persistent intraoral infection
* Women who are pregnant or breast feeding at the day of inclusion
* Smokers exceeding 15 cigarettes / day, or equivalent; patients chewing tobacco
* Unable or unwilling to cooperate for the trial period
* Estimated cantilever crown mesial-distal length \> 10 mm
* Estimated implant crown height (from implant platform to occlusal contact points) \> 15 mm
22 Years
ALL
Yes
Sponsors
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ITI Foundation
INDUSTRY
University of Geneva, Switzerland
OTHER
Responsible Party
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João Pitta
Principal Investigator, Research and Teaching Fellow
Principal Investigators
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João Pitta, Dr
Role: PRINCIPAL_INVESTIGATOR
University of Geneva
Irena Sailer, Prof
Role: STUDY_CHAIR
University of Geneva
Locations
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University of Geneva
Geneva, , Switzerland
Countries
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Central Contacts
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Facility Contacts
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João Pitta, Dr
Role: primary
Other Identifiers
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Cantilver study
Identifier Type: -
Identifier Source: org_study_id
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