Passive Fit of Implant-Supported Frameworks: Digital vs Conventional Impressions

Sex: All

Ages: 35 Years – 70 Years

Healthy volunteers: No

Phase: NA

Enrollment: 8

Sponsor: Mansoura University

Location: Faculty of Dentistry, Mansoura University Al Mansurah Dakahlia Governorate

Summary

This randomized crossover clinical trial compares the passivity of fit of complete-arch mandibular implant-supported frameworks fabricated using three impression techniques: a non-calibrated splinted digital scan body system (IO-Connect), a Reverse Scan Body (RSB) digital impression technique, and a conventional splinted open-tray impression technique. Eight completely edentulous patients each receiving four mandibular implants will be included. Passivity of fit will be evaluated clinically using the Sheffield one-screw test and radiographically using intraoral periapical radiographs obtained with the parallel technique.

Eligibility 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

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View on ClinicalTrials.gov

Source: ClinicalTrials.gov (NCT07778199). StuddyBuddy aggregates publicly available trial information.