Implant Retained CAD-CAM Ceramic Crowns

Summary

Newly available ceramic CAD-CAM blocs containing a screw channel for chairside-made crowns to be adhesively cemented to a TiBase abutment and screw-retained to an implant are appealing to the clinician, considering the time efficiency (one appointment) and overall lower costs as no dental laboratory is involved. The hypotheses are that the biological (BOP, PD, PCR, implant bone level) and mechanical outcomes (fracture, loss of retention, wear) are equivalent to implant screw-retained Porcelain-Fused-to-Metal (PFM) crowns over a 5 year observation time.This RCT will provide key information as to the cost/benefit, suitability and/or limitations of these chair-side hybrid-abutment crowns in the posterior region.

Conditions

• Prosthesis Survival

Interventions

DEVICE

PFM Crowns on gold coping cast-on

Classic impressions are taken by the operators and sent to one and same laboratory who will deliver all the screw-retained PFM restorations. The crowns will be made using a gold coping cast-on synOcta gold abutment (Ceramicor) for wide (WN) or regular (RN) neck

DEVICE

hybrid abutment lithium disilicate crown

Intraoral digital impression with respective scanbodies (Sirona) for Cerec OmniCam or Cerec Bluecam over the chosen TiBase. Cerec CAD designing (operator) and CAM milling (Cerec MCXL) of single crowns with perforated blocs (e.max CAD). crystallization/ characterization/ glaze firing for the e.max CAD crown using an oven with specific firing programmes for e.max CAD. Adhesive cementation steps of the ceramic crown onto the TiBase

DEVICE

hybrid abutment ceramic polymer infiltrated crown

Intraoral digital impression with respective scanbodies (Sirona) for Cerec OmniCam or Cerec Bluecam over the chosen TiBase. Cerec CAD designing (operator) and CAM milling (Cerec MCXL) of single crowns with perforated blocs (Enamic). Surface polishing with rubber polishers. Adhesive cementation steps of the ceramic crown onto the TiBase

Sponsors & Collaborators

• ITI Foundation

  collaborator INDUSTRY

• Susanne Scherrer

  lead OTHER

Principal Investigators

• Susanne S Scherrer, Prof, Dr · University of Geneva

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

25 Years

Max Age

70 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2015-01-01

Primary Completion

2023-12-08

Completion

2023-12-08

Countries

• Switzerland

Study Locations