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

Abdelrahman Khalaf Eldabe

Status: Active, not recruiting

Conditions: Implant-supported Full-arch Prosthesis; Photogrammetry in Dentistry; Digital Impression Accuracy; Edentulism

Treatments: Device: Intraoral Optical Scanner; Device: Intraoral Photogrammetry Scanner Elite (Shining3D)

Study type: Interventional

Funder types: Other

Identifiers

NCT07320729

17-2025-00027

Details and patient eligibility

About

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.

Full 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.

Enrollment: 4 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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4 participants in 2 patient groups

Intraoral Optical Scanner (IOS)

Experimental group

Description:

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.

Treatment:

Device: Intraoral Optical Scanner

Intraoral Photogrammetry Scanner (IPS)

Experimental group

Description:

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.

Treatment:

Device: Intraoral Photogrammetry Scanner Elite (Shining3D)