Accuracy of Intraoral Photogrammetry vs Optical Scanners for Immediate Full-Arch Implant Loading

Can Intraoral Photogrammetry Overcome Surgical Field Challenges? An In-Vivo Accuracy Study in Immediate Full-Arch Loading

This prospective in vivo clinical trial evaluates and compares the accuracy (trueness) and scanning time of intraoral photogrammetry scanners (IPS) versus conventional intraoral optical scanners (IOS) for immediate full-arch implant impressions. The reference standard will be a verified conventional splinted open-tray impression taken at the uncovering stage. Sixty edentulous arches receiving 4-6 implants will be included. Linear, angular, and 3D Euclidean deviations will be calculated to assess accuracy.

Study Overview

• Status: Active, not recruiting
• Conditions: Edentulism; Implant-supported Full-arch Prosthesis; Digital Impression Accuracy; Photogrammetry in Dentistry
• Intervention / Treatment: Device: Intraoral Optical Scanner; Device: Intraoral Photogrammetry Scanner Elite (Shining3D)

Detailed Description

Digital impression systems are widely used for implant dentistry, but complete-arch implant scans remain challenging due to lack of stable landmarks and intraoral movement. Photogrammetry technology captures implant coordinates with high trueness by eliminating stitching errors and excluding unstable soft tissue. A newly introduced intraoral photogrammetry scanner (IPS) integrates photogrammetry and intraoral imaging in a single device.

This study is the first in-vivo prospective clinical trial comparing IOS and IPS accuracy in immediate complete-arch implant loading. Patients receiving 4-6 implants in one arch will undergo two digital impressions immediately after surgery: one using IOS (AoralScan 3) and one using IPS (Elite). A conventional splinted open-tray impression at second-stage surgery will be used as the reference model. Digital files will be superimposed to calculate linear, angular, and 3D (Euclidean) deviations. Scanning time and effect of arch type will also be evaluated.

• Study Type: Interventional
• Enrollment (Estimated): 4
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Egypt
  • Asyut Governorate
    • Asyut, Asyut Governorate, Egypt, 71111
      • Assiut University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

Completely edentulous arch to receive 4-6 implants. Candidate for immediate loading with a one-piece fixed prosthesis. ASA I or II medically healthy patients. Patient able to attend follow-up visits and sign informed consent.

Exclusion Criteria:

Medically compromised patients (ASA III or higher). Poor oral hygiene or heavy smokers. Insufficient bone volume for implant placement. Uncooperative patients or those refusing participation.

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Intraoral Optical Scanner (IOS); Participants will undergo a digital implant impression using a conventional intraoral optical scanner immediately after implant placement to capture implant positions for immediate full-arch loading.	Device: Intraoral Optical Scanner; Digital intraoral scanning of implant positions using standard scan bodies for complete-arch implant impressions.
Experimental: Intraoral Photogrammetry Scanner (IPS); Participants will undergo a digital implant impression using an intraoral photogrammetry scanner immediately after implant placement to capture implant coordinates using photogrammetric scan flags combined with intraoral soft tissue scanning.	Device: Intraoral Photogrammetry Scanner Elite (Shining3D); Intraoral photogrammetric capture of implant coordinates using scan flags, combined with soft tissue scanning, without stitching.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Trueness of Implant Position (3D Euclidean Deviation)	The primary outcome is to evaluate the clinical performance of conventional intraoral scanners (IOS) and intraoral photogrammetry scanners (IPS) in immediate complete arch implant loading for each patient enrolled in the study, with a paired comparison of the deviation differences (Degree of Trueness).	3 Months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Effect of Arch Type on Digital Impression Trueness	The secondary outcome is to analyze the potential effect (correlation) of the type of arch (maxilla vs. mandible) on the degree of trueness. Also, the scanning time of the 2 techniques will be compared.	3 Months

Collaborators and Investigators

• Sponsor: Abdelrahman Khalaf Eldabe

Study record dates

Study Major Dates

• Study Start (Actual): December 7, 2025
• Primary Completion (Estimated): May 1, 2026
• Study Completion (Estimated): May 1, 2026

Study Registration Dates

• First Submitted: December 21, 2025
• First Submitted That Met QC Criteria: December 21, 2025
• First Posted (Actual): January 6, 2026

Study Record Updates

• Last Update Posted (Actual): January 6, 2026
• Last Update Submitted That Met QC Criteria: December 21, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Other Study ID Numbers: 17-2025-00027

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No