Comparing intraoral scanning and intraoral photogrammetry for full‑arch screw‑retained titanium frameworks with zirconia overlays.

Scan Time and Prosthetic Complications of Intraoral Scanning Versus Intraoral Photogrammetry for Full-Arch Titanium Framework With Zirconia Overlay Implant Screw-Retained Prostheses: A Randomized Clinical Trial

This will test whether intraoral scanning or intraoral photogrammetry gives faster scans and fewer prosthetic problems for people getting full‑arch implant‑supported titanium frameworks with zirconia overlays.

Quick facts

• Phase: Not applicable
• Study type: Interventional
• Enrollment: 11 (estimated)
• Sex: All
• Sponsor: Cairo University (Academic / other)
• Locations: 1 site (Cairo)
• Trial ID: NCT07446790 on ClinicalTrials.gov

What this trial studies

The trial enrolls completely edentulous patients receiving maxillary and/or mandibular full‑arch screw‑retained implant‑supported prostheses on 4–6 implants per arch. Participants will receive a full‑arch titanium framework with zirconia overlay and be assigned to image capture with either intraoral scanning (IOS) or intraoral photogrammetry (IOP), with scan time recorded for each procedure. Clinicians will record prosthetic complications such as screw loosening, framework fracture, and zirconia chipping, manage complications when they occur, and follow patients at 3 and 6 months after delivery. The study compares scan efficiency and short‑term prosthetic outcomes between the two digital capture methods.

Who should consider this trial

Good fit: Ideal candidates are completely edentulous patients needing maxillary and/or mandibular full‑arch fixed screw‑retained prostheses supported by 4–6 implants per arch with 9–15 mm crown height space, at least 2 mm keratinized mucosa, good oral hygiene, and controlled systemic conditions.

Not a fit: Patients with insufficient inter‑arch space (<9 mm), inadequate keratinized mucosa (<2 mm), poor oral hygiene, uncontrolled systemic disease, or who are uncooperative are unlikely to benefit or meet eligibility.

Why it matters

Potential benefit: If successful, the findings could shorten chair time and reduce short‑term prosthetic complications like screw loosening, framework fracture, or zirconia chipping.

How similar studies have performed: Previous work shows intraoral scanning often provides accurate, time‑saving digital impressions and photogrammetry has been promising for implant position capture, but photogrammetry has been less extensively tested specifically for full‑arch zirconia‑overlaid frameworks.

Eligibility criteria

Inclusion Criteria:

* Patients requiring maxillary and/or mandibular full arch screw-retained implant-supported prosthesis.
* Number of implants placed per arch ranging from 4-6 implants per arch.
* Completely edentulous patients with sufficient inter-arch space to receive fixed prosthesis (Crown height space 9-15 mm per arch).
* Adequate zone of keratinized mucosa (\> 2mm width).
* Both genders.
* Acceptable oral hygiene.
* Cooperative patients.
* Controlled systemic diseases (Diabetes, hypertension).

Exclusion Criteria:

* Completely edentulous patients with insufficient inter-arch space to receive fixed prosthesis (Crown height space lesser than 9mm per arch).
* Completely edentulous patients with in-adequate zone of keratinized mucosa (\< 2mm).
* Un cooperative patients.
* Poor oral hygiene.
* Uncontrolled systemic diseases (Diabetes, hypertension).

Where this trial is running

Cairo

• Cairo University — Cairo, Egypt (Recruiting)

Study contacts

• Study coordinator: Nour El Hoda M El Tarabishi

Conditions Scan Time