Accuracy of Scannable Healing Abutments for Implant Impressions

Sherif Aly Sadek22 enrolled

Overview

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.

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

Allocation

NON_RANDOMIZED

Purpose

DIAGNOSTIC

Masking

NONE

Enrollment

Conditions

Partially Edentulous Maxilla, Mandible

Interventions

Digital implant impression using scannable healing abutmentsPROCEDURE

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

Open-tray implant impressionPROCEDURE

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

Closed-tray implant impressionPROCEDURE

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

Eligibility

Sex: ALLMin age: 40 YearsMax age: 70 Years

Medical Language ↔ Plain English

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)

Locations (1)

Faculty of Dentistry, Cairo University

Cairo, Egypt

Outcomes

Primary Outcomes

Three-dimensional implant positional accuracy (RMS deviation)

Root mean square (RMS) deviation (µm) between test impressions and the open-tray reference model using 3D metrology software.

Time frame: Periprocedural (single assessment, 1 week after second-stage implant surgery)

Secondary Outcomes

Comparison of implant positional accuracy between impression techniques

Pairwise comparison of RMS deviation values among scannable healing abutment, open-tray, and closed-tray impression techniques

Time frame: Periprocedural (single assessment, 1 week after second-stage implant surgery)

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.