An interventional study of Smartphone and Tablet in Edentulous Jaw, sponsored by Menoufia University. Active, not recruiting at 1 site in Egypt. Open to participants aged 40 Years to 60 Years. Per ClinicalTrials.gov, last updated 2026-09-16.
Sponsored by Menoufia University · Not applicable, Interventional, and Other
Among 25 studies in Jaw, Edentulous with a site in Egypt — 3 open to participants now, 7 under way, none of them phase 3. Jaw, Edentulous · Egypt.
Among the 25 studies in Jaw, Edentulous with a site in Egypt, this one is the 8th largest by planned enrollment of the 23 interventional ones that give a count, is one of 3 that started in 2026, is one of 23 with no phase, and was the 25th registered.
122 studies on the registry are indexed under Jaw, Edentulous; 20 are open to participants now.
Browse Jaw, Edentulous studies →3 of the 25 studies in Jaw, Edentulous with a site in Egypt are open now. Recruiting first, the newest first:
Mansoura University · Sites in Egypt
Ages 35–70
Cairo University · Sites in Egypt
Ages 40+ · Healthy volunteers
Al-Azhar University · Sites in Egypt
Ages 50–65 · Healthy volunteers
A study can be open while its sites in Egypt have not opened yet or have stopped. Only those recruiting at a site in Egypt →
Of the 9 Jaw, Edentulous studies recruiting now, 4 set no upper age limit and 4 stop at 75 or younger; 1 takes children under 18; 5 take healthy volunteers.
This study: 40 Years to 60 Years · all sexes · no healthy volunteers.
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25 studies; the count open now beside each. This study's row is marked.
First in 2018; this study’s year is marked. 3 started in 2026.
This study's planned enrollment of 24 is close to the median of 24 across 99 interventional studies indexed under Jaw, Edentulous.
Median enrollment 20 across the 23 interventional studies, 27 across the 2 observational. Of the 17 that completed or were terminated, 0 (0%) have results posted.
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None of the 25 has an industry lead sponsor. The 10 most frequent:
Menoufia University is the lead sponsor of 199 studies on the registry; 54 are open to participants now.
Menoufia University has 3 studies filed under Jaw, Edentulous — fewer than ten, so there is no comparison to draw.
1 of the studies in Jaw, Edentulous with a site in Egypt that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT07821905Menoufia UniversityAccuracy of Complete-arch Implant Scans Obtained Using T-Marker | 2027-02-01 |
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Among the 25 studies in Jaw, Edentulous with a site in Egypt, from their registry updates:
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This randomized crossover clinical study will evaluate and compare the accuracy and effective scanning time of complete-arch implant scans obtained using the (TruAbutment,Marker) T-Marker photogrammetry application operated on a smartphone and a tablet. Twenty-four patients with completely edentulous arches rehabilitated with four well-integrated implants connected to multiunit abutments will undergo both digital impression protocols in a randomized sequence. A verified conventional implant cast will serve as the reference standard. Linear and angular deviations between the implant positions obtained using each digital protocol and the reference model will be evaluated using three-dimensional analysis software. Effective scanning time required for implant coordinate acquisition and registration will also be recorded. The study will determine whether the use of T-Marker with a smartphone provides accuracy and scanning efficiency comparable to its use with a tablet.
Complete-arch implant scanning is challenging because of the large interimplant distances and the limited availability of stable anatomical landmarks, which may result in cumulative image-stitching errors. Photogrammetry-based workflows have been introduced to improve the accuracy of implant position recording. T-Marker is a photogrammetry application that uses external optical markers and image-acquisition protocols to determine implant positions.
This randomized crossover clinical study will compare two T-Marker acquisition devices: a smartphone and a tablet. Each participant will undergo both digital impression protocols, with the order of the protocols randomized to minimize potential order and operator-learning effects.
A verified conventional splinted implant impression will be used to fabricate a master cast, which will be digitized using a calibrated laboratory scanner to generate the reference dataset. T-Marker optical markers will then be attached to the multiunit abutments, and complete-arch implant position data will be acquired using either an iPhone 15 Pro Max or a tablet. The resulting digital datasets will be compared with the reference dataset using three-dimensional analysis software.
Linear and angular deviations will be evaluated to determine the trueness of the implant position measurements. Effective scanning time, defined as the time required to acquire and register all implant positions using the photogrammetric acquisition mode, will also be recorded. Surface and soft-tissue scanning, STL export, and data-merging procedures will not be included in the scanning-time measurement.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants undergo complete-arch implant scanning using T-Marker optical markers attached to the multiunit abutments and a smartphone-based photogrammetry workflow.
Device: Smartphone · Device: Tablet
Participants undergo complete-arch implant scanning using T-Marker optical markers attached to the multiunit abutments and a Tablet-based photogrammetry workflow.
Device: Smartphone · Device: Tablet
Complete-arch implant positions are captured using T-Marker optical markers attached to the multiunit abutments and a smartphone-based photogrammetry workflow. An iPhone 15 Pro Max running the T-Marker application is used to acquire and register the implant positions.
Also known as: T-Marker Photogrammetry With Smartphone
Complete-arch implant positions are captured using T-Marker optical markers attached to the multiunit abutments and a tablet running the T-Marker application. The system captures and registers the three-dimensional positions of the four implants.
Angular deviation of complete-arch implant scans
Angular deviation of the implant positions obtained using T-Marker photogrammetry with a smartphone or tablet, compared with the reference implant positions obtained from the verified conventional splinted impression. Angular deviation will be measured in degrees using three-dimensional inspection software.
Time frame: Immediately after each digital impression procedure
Linear deviation of complete-arch implant scans
Linear deviation of the implant positions obtained using T-Marker photogrammetry with a smartphone or tablet, compared with the reference implant positions obtained from the verified conventional splinted impression. Linear deviation will be measured in micrometers using three-dimensional inspection software.
Time frame: Immediately after each digital impression procedure
Plan to share: No — Up on reasonable request from the corresponding author.
No publications or documents are linked to this record.
Started Aug 2026 (actual). Primary completion is estimated for Feb 2027, 6 months after the start.
Of 58 non-industry interventional studies with no phase under Jaw, Edentulous, half reached primary completion within 17 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 30. This study's planned 6 months is below that.
Counting every sponsor, half of 66 studies reached it within 20 months; a quarter within 12 and three quarters within 38.
How these figures are worked out, and which studies are left out of them.
This study is active, not recruiting, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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