Accuracy of Standard and Geometric Pattern-Assisted Digital Scanning for Full-Arch Implant Prosthesis Frameworks

Recruiting now · Not applicable

Conditions studied: Edentulous Jaw, Dental Prosthesis, Implant-Supported, Prosthodontics, Dental Implantation, Endosseous

In brief

This clinical trial aims to compare three different impression techniques used to fabricate full-arch implant-supported dental prostheses. Accurate impressions are essential to ensure a passive and precise fit of the final prosthetic framework, which contributes to long-term implant success and patient comfort. In this crossover study, participants with four osseointegrated dental implants in the lower jaw will undergo three types of impressions: Conventional splinted impression using polyvinyl siloxane (PVS) material. Standard digital impression using an intraoral scanner. Geometric pattern-assisted digital impression, which incorporates a visual reference pattern to improve scan alignment and accuracy. Each participant will receive all three impression techniques in a randomized sequence, at different time points. The accuracy of each method will be assessed by evaluating the passivity of the resulting prosthetic frameworks using two methods: (1) digital superimposition analysis to measure three-dimensional (3D) spatial deviation, and (2) the clinical "one-screw test" to detect misfit. The study seeks to determine whether digital scanning, particularly with geometric pattern assistance, can provide accuracy comparable to or better than conventional methods. Findings may guide improvements in digital prosthodontic workflows and support more efficient, predictable treatment outcomes.

Key facts

Study ID

NCT07065487

Run by

Mirna ashraf anis heneen

People needed

4

Starts

2025-09-30

Expected to finish

2026-09-15

Last updated by the study team

2025-07-15

Who can join

Age: 30 and older, up to 70. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Adults aged 30 to 70 years
• Completely edentulous mandible
• Presence of four osseointegrated implants in the lower jaw
• Good oral and general health
• Willingness to participate and provide written informed consent
• Availability for all study appointments

You may not qualify if…

• Systemic diseases or conditions that affect bone healing or implant integration
• Presence of oral inflammation, infection, or soft tissue abnormalities at implant sites
• History of bruxism or parafunctional habits
• Inability to understand or comply with study procedures

Where it is running

• Mansoura University — Al Mansurah, Dakahlia Governorate, Egypt (enrolling)

Full record on ClinicalTrials.gov

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