Intraoral vs Extraoral Cementation of Zirconia Bridges on Ti-Bases: Microstrain Evaluation

This study will evaluate whether the cementation approach of zirconia restorations onto Ti-bases influences peri-implant strain. Two clinical workflows are compared: (1) extraoral cementation of the zirconia restoration to Ti-bases on the working model prior to delivery, and (2) intraoral chairside cementation of an equivalent restoration to Ti-bases using the same intended clinical seating conditions. For each enrolled case, two restorations with the same design will be fabricated so that both cementation approaches can be assessed within the same case. After cementation, restorations will be evaluated using a standardized strain-gauge measurement setup on a model reproducing the clinical implant relationship, applying the same torque and recording procedure for both techniques. All clinical procedures will be performed at the UIC Dental Clinic, and strain-gauge recordings will be performed at the collaborating center (Universidad Europea Miguel de Cervantes, UEMC) following a consistent protocol. Data will be handled using study codes, and only study-coded technical files will be shared with the collaborating center.