Digital Impression Accuracy, Edentulism, Implant-supported Full-arch Prosthesis, Photogrammetry in Dentistry
Conditions
Brief summary
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.
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.
Interventions
DEVICEIntraoral Optical Scanner
Digital intraoral scanning of implant positions using standard scan bodies for complete-arch implant impressions.
DEVICEIntraoral Photogrammetry Scanner Elite (Shining3D)
Intraoral photogrammetric capture of implant coordinates using scan flags, combined with soft tissue scanning, without stitching.
Sponsors
Abdelrahman Khalaf Eldabe
Study design
Allocation
NON_RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Trueness of Implant Position (3D Euclidean Deviation) | 3 Months | 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). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Effect of Arch Type on Digital Impression Trueness | 3 Months | 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. |
Countries
Egypt
Outcome results
None listed