Passive Fit of Implant-Supported Frameworks Using Digital vs Conventional Impressions
Official title: Passive Fit Evaluation of Full-Arch Implant-supported Frameworks Using Digital and Conventional Impression Techniques: Crossover Study
Run by Mansoura University · NCT07778199 · Data updated 2026-11-12
This study tests whether three impression methods can produce a passively fitting full-arch mandibular implant framework for edentulous patients.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 35 Years to 70 Years |
| Sex | All |
| Enrollment | 8 (estimated) |
| Sponsor | Mansoura University Academic / other |
| Locations | 1 site (Al Mansurah, Dakahlia Governorate) |
| Status | Recruiting |
| Started | January 25, 2026 |
| Main results expected | October 25, 2026 |
| Study ends | January 25, 2027 |
| Registry record updated | August 21, 2026 |
| Trial ID | NCT07778199 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 35-70 who are fully edentulous and require a four-implant-supported mandibular fixed prosthesis, with adequate bone and ability to participate in all three Impression workflows.
✕Probably not a fit
Patients with systemic conditions affecting healing, active oral infection, severe bruxism, or inability to complete all three impression procedures may not benefit from the study outcomes.
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 trial compares the passive fit of complete-arch mandibular implant-supported frameworks fabricated from three impression techniques: IO-Connect non-calibrated digital splinted scan bodies, a Reverse Scan Body digital method, and conventional splinted open-tray impressions. Eight completely edentulous participants with at least four mandibular implants will receive four implants and undergo all three impression workflows in a randomized sequence. The fit will be assessed clinically with the Sheffield one-screw test and radiographically with parallel periapical radiographs to detect microgaps at the implant-framework interface. The study addresses whether digital workflows can achieve equivalent passive fit to conventional methods in full-arch prostheses.
Why it matters
Potential benefit: If successful, digital impression techniques may simplify workflows and reduce chair time while maintaining a passive fit for full-arch implant prostheses.
How similar studies have gone: Prior studies have explored digital vs conventional impressions for implant prostheses, but direct, multi-technique, crossover comparisons for complete-arch frameworks are limited and this design adds novel assessment of IO-Connect and Reverse Scan Body methods.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Completely edentulous patients requiring full-arch implant-supported fixed prosthesis * Age 35-70 years * Adequate mandibular bone to place at least four implants without major grafting * Ability to undergo digital scanning and radiographic evaluation * Signed informed consent Exclusion Criteria: * Systemic conditions affecting healing (uncontrolled diabetes, immunosuppression) * History of head/neck radiotherapy or bisphosphonate therapy * Active oral infection or severe bruxism * Strong gag reflex preventing accurate scanning * Poor compliance or unwillingness to attend follow-up visits
Where it's running
-
Faculty of Dentistry, Mansoura University
Al Mansurah, Dakahlia Governorate, Egypt Recruiting
Study contacts
- Study coordinator: Ahmed H Hazem Elsayed Helmi Atwa, BDS
- Email: ahmedhazem@mans.edu.eg
- Phone: +20 1092758696
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.