RecruitingNot ApplicableNCT07522671

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

Clinical Performance of 3D-Printed Resin Versus Milled Monolithic Zirconia in Implant-Supported Single Crowns and Short-Span Fixed Partial Dentures: A Randomized Controlled Clinical Trial

Sponsor

Menoufia University

Enrollment

60 participants

Start Date

Apr 1, 2026

Study Type

INTERVENTIONAL

Conditions

Prosthesis User

Summary

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

Min Age: 18 YearsMax Age: 60 Years

Inclusion Criteria8

Participants must meet all of the following:
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.
Require either:
A single implant-supported crown, or
A short-span (maximum 3-unit) implant-supported fixed partial denture (FPD) supported by two implants in the mandibular anterior region.

Exclusion Criteria5

Participants are excluded if they have any of the following:
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.

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Interventions

DEVICE3D-Printed Resin Restoration (CROWNTEC)

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