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NCT Number: NCT07393269

Accuracy of Scannable Healing Abutments for Implant Impressions

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.

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Key information

Conditions

Partially Edentulous Maxilla, Mandible

Age range

40 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Faculty of Dentistry, Cairo University

Cairo, Egypt

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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)

Treatment and study plan

Digital implant impression using scannable healing abutments

Procedure

Digital acquisition of implant position using intraoral scanning of scannable healing abutments following second-stage surgery.

Open-tray implant impression

Procedure

Conventional open-tray implant-level impression using splinted impression copings and polyvinyl siloxane material.

Closed-tray implant impression

Procedure

Conventional closed-tray implant-level impression using transfer copings and polyvinyl siloxane material.

Primary outcomes

  1. 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.

Secondary outcomes

  1. 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

Sponsors and collaborators

Lead sponsor

Sherif Aly Sadek

Other

Registry information

Official study title

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

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Feb 6, 2026
Registry last updated
Feb 6, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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