Clinical Performance of 3D-Printed Resin and Zirconia Implant Restorations

ConditionProsthesis User

Trial statusRecruiting

Trial phaseNot applicable

Trial typeInterventional

Biological sexAll

Age18-60

SponsorMenoufia University

About this trial

This randomized controlled clinical trial evaluates the clinical performance of 3D-printed resin restorations compared with milled monolithic zirconia in implant-supported single crowns and short-span fixed partial dentures (FPDs). A total of patients requiring one or two implant-supported restorations in the mandibular anterior region were randomly allocated to receive either 3D-printed permanent resin restorations (CROWNTEC) or conventionally milled zirconia prostheses.

All restorations were fabricated using a standardized digital workflow and assessed over a 12-month follow-up period. The primary outcome was restoration survival rate, while secondary outcomes included technical complications, peri-implant biological parameters, marginal bone level changes, and patient-reported satisfaction.

This study aims to provide clinical evidence regarding the viability of 3D-printed definitive resin materials as an alternative to zirconia in implant prosthodontics.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Age ≥18 years.

Have one or two osseointegrated dental implants requiring prosthetic restoration.

Demonstrate stable peri-implant tissues with no signs of inflammation or implant mobility.

Maintain good oral hygiene and controlled periodontal status.

Disqualifiers

Severe parafunctional habits (e.g., bruxism).

Uncontrolled systemic diseases affecting bone metabolism or healing.

Peri-implantitis or compromised implant stability.

Requirement for cantilever prostheses or long-span restorations, or FPDs in areas other than the mandibular anterior region.

Trial design

Design model

Parallel

Treatments tested in this trial

3D-Printed Resin Restoration (CROWNTEC)
Device
Implant-supported single crowns or short-span fixed partial dentures fabricated using 3D-printed permanent resin (CROWNTEC). Restorations are produced using a standardized digital workflow, including intraoral scanning, CAD design, 3D printing at 50 µm layer thickness, post-processing (isopropyl alcohol cleaning, post-curing), finishing, and polishing. Restorations are delivered as screw- or cement-retained prostheses. In addition, Other participants will receive implant-supported single crowns or short-span fixed partial dentures fabricated from monolithic zirconia using CAD-CAM milling. Restorations undergo sintering, finishing, and polishing, and are delive

Treatment groups

60 Participants

are divided into 2 treatment groups

Group A: 3D-Printed Resin RestorationExperimental treatment 1 intervention

Group B: Milled Zirconia RestorationsActive comparator 1 intervention

Trial outcomes

Primary outcomes

Restoration Survival Rate

The proportion of implant-supported single crowns and short-span fixed partial dentures that remain functional without fracture, loss, or need for replacement over the follow-up period. Survival is defined as the restoration remaining in situ, fully functional, and free of catastrophic failure requiring intervention.

Time frame

12 months

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Menoufia University

Lead sponsor

Source ClinicalTrials.gov

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