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Sponsor: Mansoura University
Conditions: Dental Implants, Edentulous Jaw, Passive Fit
Interventions: IO-Connect Digital Impression, Reverse Scan Body Digital Impression, Conventional Splinted Impression
Countries: Egypt
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.
Sex: ALL
Age: 35 Years to 70 Years
Healthy volunteers: No
Study type: INTERVENTIONAL
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
- Al Mansurah, Dakahlia Governorate, Egypt