Comparison of Non-Calibrated Splinting Scan Bodies and a T-Marker for Full-Arch Implant Scanning

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This randomized crossover study compares a non-calibrated splinting scan body system (IoConnect) used with an intraoral scanner to a mobile phone-based photogrammetry system (T-Marker) for capturing implant positions in four-implant, full-arch cases. Each participant will undergo both scanning methods in random order, with accuracy (trueness) measured against a verified reference model and secondary timing outcomes recorded. The trial aims to determine whether these digital workflows can provide reliable and efficient alternatives for complete-arch implant impressions. Twenty-four adults with complete maxillary edentulism and four well-integrated implants will be enrolled, with strict inclusion/exclusion criteria to ensure suitability for both techniques. The study will help inform clinical decisions in implant prosthodontics regarding feasible, patient-friendly digital impression options.

Why it matters

Who can join: the full rules

Inclusion Criteria

* 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 Criteria

* 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.

Where it's running

• Mohammed Elsawy
  Shibīn al Kawm, Shibin Alkom, Egypt Recruiting

Study contacts

• Principal investigator: Mohammed Elsawy, PhD — Menoufia University
• Study coordinator: Mohammed A. Elsawy, PhD
• Email: mohamed.elsawy@dent.menofia.edu.eg
• Phone: 00201061314522

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.