Comparison of Non-Calibrated Splinting Bodies and T-Marker for Complete-Arch Implant Scanning
Accuracy of Complete-Arch Implant Scans Obtained Using Non-Calibrated Splinting Bodies and a Mobile Phone-Based Photogrammetry System (T-Marker): A Randomized Crossover Clinical Trial
Menoufia University
40 participants
Apr 1, 2026
INTERVENTIONAL
Conditions
Summary
This randomized crossover clinical trial aims to compare the accuracy and scanning efficiency of two digital techniques for recording implant positions in completely edentulous patients receiving implant-supported full-arch prostheses. Each participant will undergo digital impressions using both a non-calibrated splinting scan body system (IoConnect) with an intraoral scanner and a mobile phone-based photogrammetry system (T-Marker). The order of the two scanning methods will be randomized. The primary outcome is the accuracy (trueness) of implant position recording, assessed by comparing each digital impression with a verified reference model. Secondary outcomes include the time required to complete each digital impression. The findings of this study may help determine whether these digital workflows provide accurate and efficient alternatives for complete-arch implant impressions, thereby supporting clinical decision-making in implant prosthodontics.
Eligibility
Inclusion Criteria5
- Adults aged 18 years or older.
- Completely edentulous maxilla rehabilitated with four well-integrated implants connected to multiunit abutments.
- Patients presenting with a screw-retained interim implant-supported prosthesis or requiring a definitive implant-supported prosthesis.
- Adequate implant osseointegration with no clinical signs of implant failure.
- Ability to understand the study procedures and provide written informed consent.
Exclusion Criteria6
- Fewer than four implants supporting the maxillary prosthesis.
- Implants located outside the maxillary arch.
- Failed implants or implants exhibiting mobility.
- Active peri-implant infection or suppuration.
- Inability to tolerate intraoral scanning or comply with study procedures.
- Refusal or inability to provide written informed consent.
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Interventions
A non-calibrated splinting scan body system used with an intraoral scanner to record complete-arch implant positions. The workflow uses splinted scan bodies that are digitally merged with the soft-tissue scan to generate the definitive implant impression.
A smartphone-based photogrammetry system used to capture complete-arch implant positions through optical markers attached to multiunit abutments. The system generates a digital implant position dataset for prosthetic workflow and accuracy assessment.
Locations(1)
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NCT07723404