Accuracy of Scannable Healing Abutments for Implant Impressions

January 31, 2026 updated by: Sherif Aly Sadek

Accuracy of Implant Impression Techniques Using Scannable Healing Abutments Versus Conventional Methods. A Controlled Clinical Trial

This prospective controlled clinical trial evaluates the three-dimensional positional accuracy of implant-level impressions obtained using scannable healing abutments compared with conventional open-tray and closed-tray impression techniques in partially edentulous patients with unilateral free-end saddle situations.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Accurate transfer of implant position is critical for achieving passive fit of implant-supported prostheses. This study compares the trueness of implant impressions obtained using a digital workflow based on scannable healing abutments with conventional open-tray and closed-tray impression techniques. Twenty-two partially edentulous patients with unilateral distal extension ridges will undergo all three impression techniques. Three-dimensional deviations will be quantified using best-fit superimposition and root mean square analysis, with the open-tray technique serving as the reference standard.

Study Type

Interventional

Enrollment (Actual)

22

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
      • Cairo, Egypt
        • Faculty of Dentistry, Cairo University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Partially edentulous patients with unilateral free-end saddle (Kennedy Class II)
  • Adequate bone for two implants
  • Good systemic health
  • Ability to provide informed consent

Exclusion Criteria:

  • Active periodontal disease
  • Poor oral hygiene
  • Parafunctional habits
  • Temporomandibular disorders
  • Heavy smoking (>10 cigarettes/day)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: Non-Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Scannable Healing Abutment Digital Impression
Intraoral digital impression using scannable healing abutments and an intraoral scanner.
Procedure: Digital implant impression using scannable healing abutments
Digital acquisition of implant position using intraoral scanning of scannable healing abutments following second-stage surgery.
Active Comparator: Open-Tray Conventional Impression
Conventional splinted open-tray implant impression using polyvinyl siloxane.
Procedure: Open-tray implant impression
Conventional open-tray implant-level impression using splinted impression copings and polyvinyl siloxane material.
Active Comparator: Closed-Tray Conventional Impression
Conventional closed-tray implant impression using polyvinyl siloxane.
Procedure: Closed-tray implant impression
Conventional closed-tray implant-level impression using transfer copings and polyvinyl siloxane material.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Three-dimensional implant positional accuracy (RMS deviation)
Time Frame: Periprocedural (single assessment, 1 week after second-stage implant surgery)
Root mean square (RMS) deviation (µm) between test impressions and the open-tray reference model using 3D metrology software.
Periprocedural (single assessment, 1 week after second-stage implant surgery)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Comparison of implant positional accuracy between impression techniques
Time Frame: Periprocedural (single assessment, 1 week after second-stage implant surgery)
Pairwise comparison of RMS deviation values among scannable healing abutment, open-tray, and closed-tray impression techniques
Periprocedural (single assessment, 1 week after second-stage implant surgery)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sherif Aly Sadek

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 2, 2025

Primary Completion (Actual)

October 20, 2025

Study Completion (Actual)

November 10, 2025

Study Registration Dates

First Submitted

January 24, 2026

First Submitted That Met QC Criteria

January 31, 2026

First Posted (Actual)

February 6, 2026

Study Record Updates

Last Update Posted (Actual)

February 6, 2026

Last Update Submitted That Met QC Criteria

January 31, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 33-6-25

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data will not be shared. The data generated in this study include identifiable clinical and radiographic measurements that are specific to the study protocol and participants. De-identified aggregate data are reported in the published manuscript.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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