This randomized trial compares computer-guided versus free-hand zygomatic implant placement in patients with atrophic maxillae or maxillary defects. Participants receive either 3D-navigated implants (using stereolithographic guides) or conventional free-hand placement. Primary outcomes measure accuracy through apical angular deviation (°), apical/coronal linear deviations (mm) relative to MSP/FHP/CP planes (CT-based), while secondary outcomes assess implant stability (ISQ) and complications (sinusitis/infection) over 6 months. The study evaluates whether guided surgery improves precision in complex maxillary rehabilitation.
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Angular deviation of zygomatic implants
Timeframe: Measured immediately post-operatively (Day 0)
Apical linear deviation of zygomatic implants
Timeframe: Measured immediately post-operatively (Day 0)
Coronal linear deviation of zygomatic implants
Timeframe: Measured immediately post-operatively (Day 0)