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NCT Number: NCT07821905

Accuracy of Complete-arch Implant Scans Obtained Using T-Marker

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.

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This study is active but is not currently recruiting participants.

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Key information

Conditions

Edentulous Jaw Jaw Diseases Jaw, Edentulous Mouth Diseases Mouth, Edentulous Musculoskeletal Diseases Stomatognathic Diseases Tooth Diseases

Age range

40 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Mohammed Elsawy

Shibīn al Kawm, Menoufia, 2266166, Egypt

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

  • Inclusion Criteria:
  • Adults aged 40-60
  • Completely edentulous maxillary arch.
  • Four well-integrated dental implants connected to multiunit abutments.
  • Implants positioned in the right and left canine and molar regions.
  • Presence of a screw-retained interim implant-supported prosthesis or need for definitive implant-supported prosthetic rehabilitation.
  • Willingness to provide written informed consent.

Exclusion criteria

  • Fewer than four implants.
  • Implants placed in the mandibular arch.
  • Failed implants.
  • Active peri-implant infection or suppuration

Treatment and study plan

smartphone

Device

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.

Other names: T-Marker Photogrammetry With Smartphone

Tablet

Device

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.

Primary outcomes

  1. Angular deviation of complete-arch implant scans

    Time frame: Immediately after each digital impression procedure

    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.

Secondary outcomes

  1. Linear deviation of complete-arch implant scans

    Time frame: Immediately after each digital impression procedure

    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.

Interested in participating?

Active, not recruiting

This study is active but is not currently recruiting participants.

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Sponsors and collaborators

Lead sponsor

Menoufia University

Other

Registry information

Official study title

Accuracy of Complete-arch Implant Scans Obtained Using (TruAbutment,Marker)T-Marker Obtained With a Mobile Phone and Tablet: A Randomized Crossover Clinical Study

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Sep 16, 2026
Registry last updated
Sep 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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